CN113267848A - Multi-wavelength dispersion compensation device, related product and optical signal processing method - Google Patents

Abstract

The application discloses a multi-wavelength dispersion compensation device, a related product and an optical signal processing method. The multi-wavelength dispersion compensation device includes a plurality of optical transmission components cascaded, wherein free spectral regions of periodic transmission lines of at least two of the optical transmission components are different. The coupling part of the optical transmission component is covered with a first electrode, and the coupling coefficient of the optical transmission component can be adjusted; the uncoupled part of the optical transmission component is covered with a second electrode, and the phase of light passing through the optical transmission component can be adjusted. The multi-wavelength dispersion compensation device can differentially construct dispersion compensation values aiming at different working wavelengths, so that differential dispersion compensation is realized for light with different working wavelengths, the dispersion compensation effect is improved, and the optical communication quality is improved.

Description

Multi-wavelength dispersion compensation device, related product and optical signal processing method

Technical Field

The present application relates to the field of optical device technologies, and in particular, to a multi-wavelength dispersion compensation device, a related product, and an optical signal processing method.

Background

Light waves transmitted in optical fibers have a certain spectral width, i.e. light waves comprise many different frequency components. Different frequency components of the light wave propagate in the optical fiber at different speeds, and signal distortion occurs after the light wave reaches a certain distance, and the physical phenomenon in the optical fiber is called dispersion or dispersion. In an optical fiber, the dispersion values of light waves of different wavelengths are different.

The dispersion causes the problems of signal error rate increase, signal to noise ratio reduction and the like, and the optical communication quality is seriously influenced. Therefore, it is necessary to compensate the dispersion of the optical fiber. The existing dispersion compensation technology can only carry out dispersion compensation to a plurality of wavelengths to the same extent and can not meet the actual requirement.

Disclosure of Invention

The application provides a multi-wavelength dispersion compensation device, a related product and an optical signal processing method, which are used for realizing differential dispersion compensation for light with different working wavelengths.

In a first aspect of the present application, there is provided a multi-wavelength dispersion compensation device, including: a plurality of optical transmission components in cascade; wherein the free spectral regions of the periodic transmission spectral lines of the at least two light transmission components are different; the optical transmission component comprises a coupling part and a non-coupling part; the coupling part comprises a first electrode which is used for adjusting the coupling coefficient of the optical transmission component; the uncoupled section includes a second electrode for adjusting the phase of light passing through the light delivery assembly.

In the multi-wavelength dispersion compensation device, since the free spectral regions of the periodic transmission lines of at least two optical transmission components are different, the transmission line envelopes formed at different operating wavelengths have different forms. Different dispersion compensation values can be constructed for different working wavelengths by utilizing the device, so that the differential dispersion compensation of different working wavelengths is realized. The specific form of the transmission line envelope is also related to the amplitude and the position of the resonance peak, and the amplitude and the position of the resonance peak can be respectively adjusted by utilizing the first electrode and the second electrode, so that the device can realize dispersion compensation with higher precision and accuracy.

In a first possible implementation manner of the first aspect of the present application, an optical transmission component includes: the micro-ring resonant cavity is coupled with the bus waveguide, and the position on the micro-ring resonant cavity, which is not coupled with the bus waveguide, is a non-coupled position; the perimeters of the micro-ring resonators of the at least two optical transmission assemblies are different. In this implementation, the perimeters of the micro-ring resonators are different, and the perimeters of the micro-ring resonators are related to the free spectral region. Thus, the free spectral regions of the periodically transmitted spectral lines of at least two light transmission components are different.

In a second possible implementation manner of the first aspect of the present application, an optical transmission component includes: a micro-ring resonant cavity and a bus waveguide; the micro-ring resonator comprises: a first transmission section and a second transmission section; the first transmission section is coupled with the bus waveguide, and the first transmission section and the bus waveguide are respectively used as two arms of a Mach-Zehnder interferometer MZI; the position on the bus waveguide, which is coupled with the first transmission section, is a coupling position, and the non-coupling position is positioned on the second transmission section; the perimeters of the micro-ring resonators of the at least two optical transmission assemblies are different. In this implementation, the perimeters of the micro-ring resonators are different, and the perimeters of the micro-ring resonators are related to the free spectral region. Thus, the free spectral regions of the periodically transmitted spectral lines of at least two light transmission components are different. In addition, MZI is used as an auxiliary structure in the optical transmission assembly, so that the difficulty of adjusting the coupling coefficient can be reduced.

With reference to the first or second possible implementation manner of the first aspect of the present disclosure, the bus waveguide is a single bus waveguide, and a through end of the single bus waveguide is an output end of the optical transmission component; or the bus waveguide is a dual-bus waveguide, and the download end of the dual-bus waveguide is the output end of the optical transmission component.

In the first and second implementation manners of the first aspect of the present application, the volume of the optical transmission component included in the multi-wavelength dispersion compensation device is small, and the overall volume of the multi-wavelength dispersion compensation device is small, which is beneficial to integrated application.

In a third possible implementation manner of the first aspect of the present application, the optical transmission module includes: a Mach-Zehnder interferometer MZI; the coupling position of two arms of the MZI is a coupling position, and the position on any one arm of the two arms, which is not coupled with the other arm, is a non-coupling position; the MZIs of the at least two optical transmission components differ in arm length. In this implementation, the arm length differences of the MZIs are different, and the arm length differences of the MZIs are related to the free spectral region. Thus, the free spectral regions of the periodically transmitted spectral lines of at least two light transmission components are different.

With reference to the first aspect of the present application, or the first, second, or third possible implementation manner of the first aspect, the first electrode is a hot-light electrode or an electro-light electrode; the second electrode is a hot or electro-optic electrode.

With reference to the first aspect of the present application, or the first, second, or third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect of the present application, the multi-wavelength dispersion compensation device further includes: the first electrode and the second electrode are respectively and electrically connected with the controller; the controller is used for providing a first control signal to the first electrode so that the first electrode adjusts the coupling coefficient of the optical transmission component according to the first control signal; the controller is further configured to provide a second control signal to the second electrode to cause the second electrode to adjust the phase of light passing through the optical transmission component according to the second control signal.

It should be noted that the controller connected to the first electrode and the second electrode may be located in the multi-wavelength dispersion compensation device or may be located outside the multi-wavelength dispersion compensation device.

With reference to the fourth possible implementation manner of the first aspect of the present application, the controller is specifically configured to provide a first control signal and a second control signal according to the target dispersion compensation information and the mapping relation table; the mapping relation table comprises: a mapping of the dispersion compensation information to the voltage that should be applied across the first and second electrodes.

With reference to the fourth possible implementation manner of the first aspect of the present application, the controller is specifically configured to obtain real-time dispersion compensation information, and provide the first and second control signals according to a difference between the real-time dispersion compensation information and target dispersion compensation information.

In a second aspect of the present application, there is provided a light emitting apparatus comprising: the multi-wavelength dispersion compensation device, the first optical transmission device, the second optical transmission device, and the combiner provided in the first aspect or any specific implementation manner thereof. Wherein the first light emitting device and the second light emitting device emit light waves of different operating wavelengths; the output end of the first light emitting device and the output end of the second light emitting device are respectively connected with the input end of the wave combiner in an optical mode; the output end of the wave combiner is optically connected with the input end of the multi-wavelength dispersion compensation device, and the output end of the multi-wavelength dispersion compensation device is used for outputting the optical waves after dispersion compensation.

In a third aspect of the present application, there is provided a light receiving device including: the first aspect provides the multi-wavelength dispersion compensation device and the light receiving device in any specific implementation manner thereof. The input end of the multi-wavelength dispersion compensation device is used for receiving optical waves with various working wavelengths to be subjected to dispersion compensation, the output end of the multi-wavelength dispersion compensation device is optically connected with the input end of the light receiving device, and the light receiving device is used for performing photoelectric conversion on the optical waves subjected to dispersion compensation.

In the apparatus provided in the second aspect and the third aspect, the multi-wavelength dispersion compensation device provided in the first aspect is integrated, so that the apparatus can realize differential dispersion compensation of optical waves with multiple operating wavelengths, so that the dispersion compensation has stronger purpose and adaptability, the dispersion compensation effect is improved, and further, the optical communication quality is enhanced. In addition, the multi-wavelength dispersion compensation device is integrated in an integrated product, coupling insertion loss is reduced, and function expansion of the integrated product is realized.

In a fourth aspect of the present application, an optical signal processing method is provided. The method comprises the following steps:

receiving an optical signal to be dispersion compensated; the optical signal to be subjected to dispersion compensation comprises a first optical wave and a second optical wave with different working wavelengths;

constructing a first dispersion compensation value corresponding to the first optical wave and a second dispersion compensation value corresponding to the second optical wave by using the multi-wavelength dispersion compensation device provided by the first aspect;

carrying out dispersion compensation on the first optical wave by using the first dispersion compensation value to obtain a first processed optical wave; and performing dispersion compensation on the second optical wave by using the second dispersion compensation value to obtain a second processed optical wave.

Since the multi-wavelength dispersion compensation device provided in the first aspect or any specific implementation manner thereof can respectively construct dispersion compensation values for different operating wavelengths, differential dispersion compensation is achieved. In addition, the dispersion compensation value constructed by the device has higher precision and accuracy, so the method can realize the dispersion compensation with higher precision and accuracy, improve the dispersion compensation effect and further improve the optical communication quality.

According to the technical scheme, the embodiment of the application has the following advantages: by cascading a plurality of optical transmission components having different free spectral regions, dispersion compensation for differences in different wavelengths is achieved.

Drawings

Fig. 1a is a schematic structural diagram of a multi-wavelength dispersion compensation device according to an embodiment of the present disclosure;

fig. 1b is a schematic structural diagram of another multi-wavelength dispersion compensation device provided in the embodiment of the present application;

fig. 2a is a schematic structural diagram of a pass-through multi-wavelength dispersion compensation device according to an embodiment of the present disclosure;

FIG. 2b is a schematic diagram of the optical wave flow direction and port in the optical transmission module of the multi-wavelength dispersion compensation device shown in FIG. 2 a;

FIG. 3a is a schematic diagram showing the relationship between the group velocity delay and the wavelength corresponding to the straight-through type iso-resonant cavity perimeter dispersion compensation device;

FIG. 3b is a schematic diagram illustrating the relationship between the group velocity delay and the wavelength of the multi-wavelength dispersion compensation device shown in FIG. 2 a;

fig. 4 is a schematic structural diagram of a download-type multi-wavelength dispersion compensation device according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of the optical wave flow direction and ports in the optical transmission module of the multi-wavelength dispersion compensation device shown in FIG. 4;

fig. 6 is a schematic structural diagram of another through-type multi-wavelength dispersion compensation device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another download-type multi-wavelength dispersion compensation device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another multi-wavelength dispersion compensation device provided in the embodiment of the present application;

fig. 9 is a schematic structural diagram of a light emitting device according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a light receiving device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of another light receiving device provided in an embodiment of the present application;

fig. 12 is a flowchart of an optical signal processing method according to an embodiment of the present application.

Detailed Description

The dispersion of the light wave transmitted in the optical fiber is easy to cause poor signal quality, and the dispersion compensation can be adopted to improve the signal quality. When optical waves with various operating wavelengths are transmitted in an optical fiber, the dispersion problem is more complicated due to the difference of dispersion zero points. It is found through research that if the same dispersion compensation value is used to uniformly perform the same degree of dispersion compensation on the optical waves with different operating wavelengths, the compensation effect is not good.

Therefore, the embodiment of the application provides a multi-wavelength dispersion compensation device, a related product and an optical signal processing method, which are used for realizing differential dispersion compensation on optical waves with different working wavelengths.

Fig. 1a is a schematic structural diagram of a multi-wavelength dispersion compensation device 10-a according to an embodiment of the present application. The device comprises n cascaded optical transmission components: optical transmission component 101, optical transmission components 102, …, optical transmission component 10 n. Wherein n is a positive integer greater than 1. The light transmission assemblies 101-10 n can form periodic transmission lines.

The Free Spectral Range (FSR) of an optical transmission module refers to the difference between the wavelengths corresponding to two adjacent resonance peaks on the periodic transmission spectrum line formed by the optical transmission module. For a dispersion compensating device, if the FSRs of the periodic transmission lines of all the optical transmission components it contains are equal, different dispersion compensation values cannot be constructed for different operating wavelengths.

In order to construct different dispersion compensation values at different operating wavelengths, in the multi-wavelength dispersion compensation device 10-a provided in this embodiment, the FSRs of the periodic transmission lines of at least two optical transmission components 101 to 10n are different. Suppose the two optical transmission components are 101 and 102, respectively, where the FSR of the optical transmission component 101 is FSR1, the FSR of the optical transmission component 102 is FSR2, and FSR1 ≠ FSR 2.

Each of the optical transmission units 101 to 10n includes a coupling device. The different optical transmission components may be of the same type or of different types. In one specific implementation, the optical transmission component is a resonant cavity + a bus waveguide, and the resonant cavity is coupled at a tangent of the bus waveguide. In another specific implementation, the optical transmission component is a resonant cavity + a bus waveguide, and a section of the resonant cavity and the bus waveguide are each coupled as two arms of a Mach-Zehnder Interferometer (MZI). In yet another specific implementation, the optical transmission component is a MZI.

In the embodiment of the application, the coupling coefficient of each optical transmission component in the optical transmission components 101-10 n and the phase of light passing through the optical transmission component are adjustable, so that transmission line envelopes corresponding to different working wavelengths are formed conveniently, and a dispersion compensation value meeting the actual dispersion compensation requirement is constructed.

In order to adjust the coupling coefficient of the optical transmission member, a first electrode is covered at the coupling place of the optical transmission member. The first electrode may be a thermo-optic electrode or an electro-optic electrode. The principle of action of the thermo-optic electrode is based on the thermo-optic effect. The thermo-optic electrode is arranged at the coupling position, electricity is applied to the thermo-optic electrode to generate heat, the heat is conducted to the waveguide material at the coupling position, the refractive index of the waveguide material at the coupling position can be changed, and therefore the coupling coefficient of the optical transmission component is changed. The electro-optical electrode is used for pre-doping ions in the waveguide material at the coupling position based on the electro-optical effect, the electro-optical electrode is arranged at the coupling position, the ion distribution at the coupling position is changed by electrifying the electro-optical electrode, the refractive index of the waveguide material at the coupling position can be changed, and therefore the coupling coefficient of the optical transmission assembly is changed. The coupling coefficient of the optical transmission component is represented as: a resonant peak amplitude of a periodic transmission line of the optical transmission component. That is, the larger the coupling coefficient, the larger the amplitude of the resonance peak; the smaller the coupling coefficient, the smaller the amplitude of the resonance peak.

To adjust the phase of the light passing through the light transmitting member, a second electrode is covered at the uncoupled portion of the light transmitting member. Similarly, the second electrode may be a thermo-optic electrode or an electro-optic electrode. The second electrode is energized to change the refractive index of the waveguide at the uncoupled position, thereby causing a change in the phase of light passing through the optical transmission component. The phase of the light passing through the optical transmission component is represented as: a resonant peak position of a periodic transmission line of the optical transmission component. That is, the position of the resonance peak can be changed using the second electrode.

By adopting at least two optical transmission assemblies with different FSRs of the periodic transmission spectral lines, the multi-wavelength dispersion compensation device in the embodiment can construct different dispersion compensation values for different working wavelengths, so that the compensation effect on light is improved, and the optical communication quality is further improved. By arranging the first electrode and the second electrode, the construction of the dispersion compensation value has higher controllability, and the dispersion compensation precision and accuracy are improved.

In practical applications, the first electrode and the second electrode of each optical transmission component in the multi-wavelength dispersion compensation device can be connected with a controller outside the dispersion compensation device, and the adjustment is controlled by the external controller. Further, a controller having this function may be provided in the multi-wavelength dispersion compensation device. Referring to the example of fig. 1b, a controller (MCU) may also be provided inside the multi-wavelength dispersion compensation device 10-b. The first and second electrodes (not shown in FIG. 1 b) in the optical transmission components 101-10 n are connected to the MCU, respectively. The first electrode responds to the control of the MCU and adjusts the coupling coefficient of the optical transmission component where the first electrode is located. The second electrode adjusts the phase of light passing through the light transmission component in which it is located in response to the control of the MCU. In this embodiment, for the convenience of distinction, the control signals sent by the MCU to the first electrode and the second electrode are referred to as a first control signal and a second control signal, respectively. It should be noted that, based on the actual requirement for constructing the dispersion compensation value for different operating wavelengths, the voltages of the first control signal sent by the MCU to each first electrode and the second control signal sent by the MCU to each second electrode may be the same or different.

The MCU may provide the first control signal and the second control signal in a number of possible ways.

In a first possible implementation manner, before performing dispersion compensation on multiple operating wavelengths respectively, a mapping relation table is established in advance by means of calibration and the like. The mapping table includes at least a mapping of the dispersion compensation information and a voltage to be applied to the first electrode and the second electrode. It should be noted that the structure of the optical transmission component is known before the mapping relationship is calibrated and the mapping relationship table is established. The FSR of the periodic transmission lines of the individual light transmission components is also known.

The dispersion compensation information may include a dispersion value or a dispersion compensation value. Wherein, the dispersion compensation value is the dispersion compensation required to be provided for the dispersion value. The dispersion value is usually expressed as a positive number, and the dispersion compensation value and the dispersion value are opposite numbers. For example, the dispersion value reaches 720ps/nm, and the compensation value is-720 ps/nm. Optionally, the dispersion compensation information may also include fiber length, operating wavelength and spectral range of the light source, and the like. The present application is not limited thereto.

Taking table 1 below as an example, after voltages are applied to the first electrode and the second electrode respectively according to table 1, the corresponding dispersion compensation information is satisfied. For example, by applying voltages of X1mV and Y1mV to the first electrode E1 and the second electrode E2 of the optical transmission module 101, respectively, applying voltages of Z1mV and L1mV, … to the first electrode E1 and the second electrode E2 of the optical transmission module 102, respectively, and applying voltages of M1mV and N1mV to the first electrode E1 and the second electrode E2 of the optical transmission module 10N, respectively, the multi-wavelength dispersion compensation device can realize dispersion compensation of-720 ps/nm and dispersion compensation of-640 ps/nm for two different operating wavelengths λ 1 and λ 2, respectively.

TABLE 1 mapping relationship table of dispersion compensation information and voltage

When dispersion compensation needs to be performed on the optical waves with various working wavelengths, the MCU firstly determines target dispersion compensation information. The target dispersion compensation information includes dispersion compensation information respectively expected for a plurality of operating wavelengths. The MCU determines the voltages to be applied to each first electrode and each second electrode from the established mapping relation table by taking the target dispersion compensation information as an index condition, and provides corresponding first control signals for each first electrode and corresponding second control signals for each second electrode according to the voltage values.

In a second possible implementation manner, the MCU is configured to obtain real-time dispersion compensation information, and provide the first control signal and the second control signal according to a difference between the real-time dispersion compensation information and target dispersion compensation information. The real-time dispersion compensation information is real-time feedback for performing dispersion compensation on optical waves with various working wavelengths. As an example, the real-time dispersion compensation information includes a real-time dispersion compensation value, and the target dispersion compensation information includes a target dispersion compensation value. The real-time dispersion compensation value is compared with the target dispersion compensation value, and the voltage applied to the first electrode and the second electrode can be increased or decreased according to the relative magnitude of the comparison result, so that the finally measured real-time dispersion compensation value is consistent with the target dispersion compensation value. That is, after obtaining the real-time dispersion compensation information, the MCU may generate the first control information to be sent to the first electrode and the second control signal to be sent to the second electrode according to the magnitude of the voltage applied to the first electrode and the second electrode as required.

In the foregoing embodiments, it is described that the multiple optical transmission components in the multi-wavelength dispersion compensation device are in cascade connection. The implementation of the multi-wavelength dispersion compensation device is mainly reflected in the implementation of the optical transmission component. Various specific implementations of the multi-wavelength dispersion compensation device are described below with reference to the drawings.

In the present embodiment, each optical transmission component in the multi-wavelength dispersion compensation device includes a micro-ring resonator and a bus waveguide. The coupling position of the micro-ring resonant cavity and the bus waveguide is a coupling position, and the position on the micro-ring resonant cavity, which is not coupled with the bus waveguide, is the non-coupling position.

In this embodiment, the perimeters of the micro-ring resonators included in at least two of the optical transmission elements are different. Because the FSR is in negative correlation with the perimeter of the micro-ring resonant cavity, the larger the perimeter of the micro-ring resonant cavity is, the smaller the FSR of the optical transmission assembly is; the smaller the perimeter of the micro-ring resonator, the larger the FSR of the optical transmission assembly. Therefore, the different circumferences of the micro-ring resonant cavities of the at least two optical transmission assemblies can ensure that the FSRs of the periodic transmission lines of the at least two optical transmission assemblies in the device are different.

The bus waveguide coupled to the micro-ring resonator may be a single bus waveguide. The through end of the single bus waveguide serves as the output end of the optical transmission component. Fig. 2a is a schematic structural diagram of a straight-through multi-wavelength dispersion compensation device according to this embodiment.

The multi-wavelength dispersion compensation device in fig. 2a comprises three cascaded optical transmission components. The three optical transmission components respectively include a micro-ring resonator 201a, a micro-ring resonator 202a, and a micro-ring resonator 203 a. The perimeter of the cavity increases in turn. It should be noted that fig. 2a only illustrates micro-ring resonators with successively increasing circumferences. In practical applications, the change of the resonant cavity perimeter may also be sequentially reduced, increased and then reduced, or reduced and then increased. That is, the perimeters of the micro-ring resonators 201a, 202a, and 203a may be different. This application is not limited thereto. In addition, fig. 2a only illustrates a circular micro-ring resonator. In practical application, the micro-ring resonant cavity can also be in a track shape, an oval shape and other shapes.

The multi-wavelength dispersion compensation device in fig. 2a includes a bus waveguide L02, and the micro-ring resonator 201a, the micro-ring resonator 202a and the micro-ring resonator 203a are respectively coupled to the bus waveguide L02. It is understood that the micro-ring resonator 201a, the micro-ring resonator 202a and the micro-ring resonator 203a are coupled to three end-to-end sections of the bus waveguide L02, respectively. A first electrode E1 is included at the coupling of each light transport component and a second electrode E2 is included at the non-coupling of each light transport component. The operation principle and function of the first electrode E1 and the second electrode E2 are described in the foregoing embodiments, and are not described herein again.

Fig. 2b is a schematic diagram of the optical wave flow direction and port in an optical transmission module of the multi-wavelength dispersion compensation device shown in fig. 2 a. The single bus waveguide 201b has an input terminal and a through terminal. For the optical transmission assembly shown in this figure, the light wave enters from the input terminal. After the optical wave enters the optical transmission component, a part of the optical wave enters the micro-ring resonator 201a at the coupling position, and is transmitted in the micro-ring resonator in the counterclockwise direction, and finally the optical wave is output from the through end of the single bus waveguide 201b of the optical transmission component. When the optical transmission assemblies are mutually cascaded, the through end of the single-bus waveguide of the previous optical transmission assembly is connected with the input end of the single-bus waveguide of the next optical transmission assembly.

With the multi-wavelength dispersion compensation device provided by the present embodiment (as shown in fig. 2a), corresponding dispersion compensation values can be respectively constructed for different operating wavelengths. This is explained below in connection with further figures. Fig. 3a is a schematic diagram showing the relationship between the group velocity delay and the wavelength corresponding to the straight-through type iso-resonant cavity perimeter dispersion compensation device. Fig. 3b is a schematic diagram of the relationship between the group velocity delay and the wavelength corresponding to the multi-wavelength dispersion compensation device shown in fig. 2 a. In fig. 3a and 3b, the transverse direction represents the wavelength and the longitudinal direction represents the group velocity delay of the optical transmission component.

As shown in fig. 3a, transmission line s301, transmission line s302 and transmission line s303 are periodic; there are a plurality of resonance peaks in each wavelength dimension. Each transmission line in fig. 3a illustrates only three resonance peaks as an example. The transmission lines s301, s302 and s303 respectively correspond to different optical transmission assemblies, and the perimeters of the micro-ring resonant cavities in the three optical transmission assemblies are equal. In fig. 3a, the distance of adjacent resonance peaks (i.e. FSR) is the same for transmission lines s301, s302 and s 303. The transmission lines s301, s302, and s303 form a transmission line envelope s300 in one cycle, and the FSRs of the transmission lines s301, s302, and s303 are uniform. Therefore, the shape of the transmission line envelope s300 formed in each period is uniform.

In practical application, the derivative of the wavelength is taken for the group velocity delay, and the obtained result is a dispersion compensation value. The slope of the tangent to each transmission line envelope in fig. 3a is known as the dispersion compensation value. The transmission line envelope s300 formed within each period is uniform in morphology. Thus, the dispersion compensation values at the three different operating wavelengths are all Ds 3. Therefore, for the straight-through type dispersion compensation device, the circumferences of the cascaded micro-ring resonators are equal, so that only the same dispersion compensation value can be constructed for different working wavelengths, the dispersion compensation effect is poor, and the optical communication quality is affected.

As can be seen from fig. 3b, the transmission lines k301, k302 and k303 are periodic, with a plurality of resonance peaks in the wavelength dimension. Each transmission line in fig. 3b illustrates only three resonance peaks as an example. For transmission lines k301, k302 and k303, these correspond to the three light transmission components from left to right in fig. 2 a. In fig. 2a, the perimeters of the micro-ring resonators increase sequentially from left to right. As shown in fig. 3b, the FSR of transmission lines k301, k302 and k303 decreases in sequence. Therefore, the form of the transmission line envelope k300 formed at each period is different. Further, different dispersion compensation values Dk31, Dk32 and Dk33 may be constructed for different operating wavelengths. Wherein Dk31, Dk32 and Dk33 are all negative numbers, and | Dk31| > | Dk32| > | Dk33 |.

As can be seen from a comprehensive comparison between fig. 3a and fig. 3b, the dispersion compensation device shown in fig. 2a can respectively construct dispersion compensation values for different operating wavelengths, so as to implement differential dispersion compensation for optical waves with different operating wavelengths.

In the optical transmission assembly, the bus waveguide coupled to the micro-ring resonator may be a dual bus waveguide. And the download end of the double-bus waveguide is used as the output end of the optical transmission component. Fig. 4 is a schematic structural diagram of a download-type multi-wavelength dispersion compensation device provided in this embodiment. The multi-wavelength dispersion compensation device illustrated in fig. 4 includes three cascaded optical transmission components. The three optical transmission components respectively comprise a micro-ring resonant cavity 401a, a micro-ring resonant cavity 402a and a micro-ring resonant cavity 403a, and the perimeters of the resonant cavities are sequentially increased. In this embodiment, the variation manner of the perimeter of each micro-ring resonator in the multi-wavelength dispersion compensation device is not limited, and the shape of the micro-ring resonator is also not limited.

As shown in fig. 4, the micro-ring resonator 401a is coupled to the dual bus waveguide 401b, the micro-ring resonator 402a is coupled to the dual bus waveguide 402b, and the micro-ring resonator 403a is coupled to the dual bus waveguide 403 b. Each optical transmission member includes two coupling sites where the first electrodes E1 are respectively covered. The second electrode E2 is disposed at a position on the micro-ring resonator where the micro-ring resonator is not coupled to the dual bus waveguide, i.e., where the micro-ring resonator is not coupled to the dual bus waveguide. The operation principle and function of the first electrode E1 and the second electrode E2 are described in the foregoing embodiments, and are not described herein again.

Fig. 5 is a schematic diagram of the optical wave flow direction and port in an optical transmission module of the multi-wavelength dispersion compensation device shown in fig. 4. The dual bus waveguide 401b has an input terminal, a through terminal, a drop terminal and an upload terminal. As shown in fig. 5, after the light wave enters the optical transmission component from the input end, a part of the light wave enters the micro-ring resonator 401a at the coupling position at the lower part, is transmitted in the micro-ring resonator in the counterclockwise direction, and after 0.5 × W turns (where W is an odd number) are transmitted in the micro-ring resonator 401a, the light wave enters the dual bus waveguide 401b again through the coupling position at the upper part, and finally the light wave is output from the drop end. When the optical transmission components are mutually cascaded, the drop end of the double-bus waveguide of the previous optical transmission component is connected with the input end of the double-bus waveguide of the next optical transmission component.

The relationship of group velocity delay to wavelength for a download-type iso-resonator perimeter dispersion compensator is similar to the example shown in fig. 3 a. That is, the shape of the transmission line envelope formed in each period is uniform. The only difference is that: in fig. 3a, the transmission line envelope appears concave once per period, while the transmission line envelope of the download-type iso-cavity perimeter dispersion compensator appears convex once per period. Similarly, the download-type dispersion compensation device can only perform dispersion compensation to the same extent on different operating wavelengths because the circumferences of a plurality of cascaded micro-ring resonators included in the download-type dispersion compensation device are equal, the dispersion compensation effect is poor, and the optical communication quality is affected.

The schematic diagram of the relationship between the group velocity delay and the wavelength corresponding to the multi-wavelength dispersion compensation device shown in fig. 4 is similar to that shown in fig. 3 b. The micro-ring resonant cavities in the optical transmission assembly have different circumferences and different FSRs. Therefore, the morphology of the transmission line envelope formed in each period is different. The only difference is that: the transmission line envelope of fig. 3b appears concave once per period, whereas the transmission line envelope of the multi-wavelength dispersion compensation device shown in fig. 4 appears convex once per period. Similarly, for different operating wavelengths, different dispersion compensation values can be constructed by using the multi-wavelength dispersion compensation device shown in fig. 4, so as to implement differential dispersion compensation for the optical waves with different operating wavelengths.

In the present embodiment, each optical transmission component in the multi-wavelength dispersion compensation device includes a micro-ring resonator and a bus waveguide. The coupling position of the micro-ring resonant cavity and the bus waveguide is a coupling position, and the position on the micro-ring resonant cavity, which is not coupled with the bus waveguide, is the non-coupling position. Unlike the optical transmission module shown in fig. 2b and fig. 5, in the present embodiment, for an optical transmission module, a section of the micro-ring resonator and the bus waveguide respectively serve as two arms of the MZI.

The micro-ring resonator includes a first transmission section and a second transmission section. Wherein the first transmission section is coupled to the bus waveguide, the first transmission section and the bus waveguide respectively serving as two arms of the MZI. The position on the bus waveguide, which is coupled with the first transmission section, is a coupling position, and the non-coupling position is positioned in the second transmission section of the micro-ring resonant cavity.

In this embodiment, the perimeters of the micro-ring resonators included in at least two optical transmission assemblies are different, so that it is ensured that FSRs of periodic transmission lines of at least two optical transmission assemblies in the device are different.

In this embodiment, the bus waveguide may be a single bus waveguide, and the through end of the single bus waveguide is used as the output end of the optical transmission component. A through-type multi-wavelength dispersion compensating device as shown in fig. 6. In addition, the bus waveguide may be a dual bus waveguide, and the drop end of the dual bus waveguide may be used as the output end of the optical transmission component. Such as the download-type multi-wavelength dispersion compensation device shown in fig. 7.

Fig. 6 illustrates a multi-wavelength dispersion compensation device including three optical transmission components. The three optical transmission components comprise micro-ring resonant cavities with the circumferences increasing from left to right. In the three optical transmission assemblies, the first transmission sections of the micro-ring resonator are 601a, 602a and 603a, respectively; the second transmission segments are 601b, 602b, and 603b, respectively. The first transmission sections 601a, 602a and 603a are respectively coupled with a single bus waveguide L06. It will be appreciated that the first transmission sections 601a, 602a and 603a are coupled to three end-to-end sections of the single bus waveguide L06, respectively.

It can be seen from fig. 6 that the first transmission section and the short section of the bus waveguide act as two arms of the MZI. A first electrode E1 is disposed on one arm of the bus waveguide of the MZI. The first electrode E1 can be used to adjust the coupling coefficient of the MZI, that is, to adjust the coupling coefficient of the optical transmission component. Since the second transmission segments 601b, 602b, and 603b are not involved in coupling, any point on the second transmission segments 601b, 602b, and 603b is a non-coupling point. The second electrode E2 is disposed at any one of the second transfer sections 601b, 602b, and 603 b.

As can be seen from fig. 6, the through end of the single bus waveguide of the previous optical transmission component is butted with the input end of the single bus waveguide of the next optical transmission component, so as to realize the transmission of the optical wave from the previous optical transmission component to the next optical transmission component. The arrows in fig. 6 are shown as the direction of light wave flow in an optical transmission component.

The multi-wavelength dispersion compensation device illustrated in fig. 7 includes three optical transmission components, and the three optical transmission components include micro-ring resonators having a circumference that increases from bottom to top. Among the three optical transmission components, the dual bus waveguides are 701c, 702c, and 703c, respectively. Since the three light transmission assemblies have similar structures, only the lowermost light transmission assembly will be described as an example. In the lowermost optical transmission assembly, the micro-ring resonator includes a first transmission section 701a, shown in dashed lines, coupled to a dual bus waveguide 701 c; the micro-ring resonator also includes a second transmission section 701b shown in solid lines. As can be seen from fig. 7, two MZIs are formed in the optical transmission module, and first electrodes E1 are provided on one arm of the bus waveguides of the two MZIs; a second electrode E2 is provided on the second transmission segment 701 b.

The dual bus waveguide of each optical transmission assembly has an input terminal, a through terminal, a drop terminal, and an add terminal. In the optical transmission module shown in fig. 7, as indicated by the arrow in the figure, after an optical wave enters the optical transmission module from the input end, a part of the optical wave enters the micro-ring resonator through the lower MZI, and is transmitted in the micro-ring resonator in the counterclockwise direction, after 0.5 × W turns (where W is an odd number) are transmitted in the micro-ring resonator, the optical wave passes through the upper MZI, and finally the optical wave is output from the drop end. When the optical transmission components are mutually cascaded, the drop end of the double-bus waveguide of the previous optical transmission component is connected with the input end of the double-bus waveguide of the next optical transmission component.

In the embodiment of the present application, the effect of the devices shown in fig. 6 and 7 on constructing the dispersion compensation value can be referred to fig. 3 b. It can be seen that, in the multi-wavelength dispersion compensation device including the MZI auxiliary structure provided in this embodiment, the FSRs of the periodic transmission lines of different optical transmission components are different due to the difference in the circumferences of the micro-ring resonators. Corresponding dispersion compensation values can be constructed for different working wavelengths, so that differential dispersion compensation is realized for different working wavelengths.

In the embodiment of the present application, as a possible implementation manner, the MZI formed by the first transmission section of the micro-ring resonator and the bus waveguide may be an equal-arm MZI. That is, the arms of the MZI are equal in length.

In this embodiment, the optical transmission component adopts a micro-ring resonator with an MZI auxiliary structure, and the first electrode is disposed on the arm of the MZI, so that the difficulty in adjusting the coupling coefficient of the optical transmission component is reduced, and the coupling coefficient can be adjusted more finely.

In addition, fig. 2a, 4, 6 and 7 provide a multi-wavelength dispersion compensation device in which the optical transmission component includes a bus waveguide and a micro-ring resonator, so that the overall volume of the multi-wavelength dispersion compensation device is small. Accordingly, the insertion loss of the multi-wavelength dispersion compensation device during use is small.

In this embodiment, as a possible implementation, each optical transmission component in the multi-wavelength dispersion compensation device includes an MZI. The location where the two arms of the MZI are coupled is the coupling. The position on any arm of the two arms, which is not coupled with the other arm, is the non-coupling position. The present embodiment is an MZI cascade, which is different from the optical transmission module of the multi-wavelength dispersion compensation device provided in fig. 2a, 4, 6 and 7. In addition, in contrast to fig. 6 and 7, in the present exemplary embodiment, for each MZI, only one input and one output are active, the output of the preceding MZI being used for connection to the input of the following MZI; while figures 6 and 7 work for each MZI, four ports.

In this embodiment, the arm length difference of at least two MZIs is different, so that it can be ensured that the FSRs of the periodic transmission lines of at least two optical transmission components in the device are different. In fig. 6 and 7, the difference in FSR depends mainly on the difference in the circumference of the micro-ring resonator, and if the MZI is equi-armed, the difference in FSR depends mainly on the difference in the length of the second transmission section. For the sake of understanding, the following describes a multi-wavelength dispersion compensation device provided in the embodiments of the present application with reference to the drawings.

Fig. 8 is a schematic structural diagram of another multi-wavelength dispersion compensation device according to an embodiment of the present application. In fig. 8, only three MZIs are taken as an example, and the number of optical transmission components of the MZI structure in the multi-wavelength dispersion compensation device in practical use is two or more, that is, it is not limited to three. As can be seen from FIG. 8, each MZI presents a certain arm length difference, i.e., the two arm lengths are not equal. Comparing different MZIs shows that the arm lengths of different MZIs are different. In FIG. 8, the arm length differences for the three MZIs from left to right increase sequentially.

In one possible implementation, the two arms of the MZI may be coupled using a Directional Coupler (DC). The first electrode E1 is disposed at the two-arm coupling of the MZI, and may be specifically overlaid on DC. A second electrode E2 is located at a position where either arm of the MZI is not coupled to the other arm. In the dispersion compensating device shown in fig. 8, the second electrode E2 is located on one arm shown by a dotted line, but in practice the second electrode E2 of each MZI may be disposed on the other arm. That is, as another implementation, the second electrode E2 may be provided on the arm shown by the solid line 801a, the solid line 802a, or the solid line 803 a. The operation principle and function of the first electrode E1 and the second electrode E2 are described in the foregoing embodiments, and are not described herein again.

The multi-wavelength dispersion compensation device provided by the embodiment can construct an applicable dispersion compensation value for different working wavelengths, so that differential dispersion compensation can be realized for different working wavelengths. Therefore, the dispersion compensation effect on the light waves containing various working wavelengths is improved, and the optical communication quality is improved. Based on the multi-wavelength dispersion compensation device provided by the foregoing embodiments, the present application further provides an optical transmitting apparatus and an optical receiving apparatus. The following description is made with reference to the accompanying drawings.

Apparatus embodiment

Fig. 9 is a schematic structural diagram of a light emitting device 90 according to an embodiment of the present disclosure. The light emitting apparatus 90 includes a first light emitting device 901, a second light emitting device 902, a combiner MUX, and a multi-wavelength dispersion compensation device 903. The output terminal p1 of the first light emitting device 901 and the output terminal p2 of the second light emitting device 902 are optically connected to the input terminals of the MUX, respectively. The output terminal p3 of the MUX is optically connected to the input terminal p4 of the multi-wavelength dispersion compensating device 903.

In the light emitting apparatus 90, the first light emitting device 901 and the second light emitting device 902 are used to supply light waves of different operating wavelengths, respectively. For example, the first light emitting device 901 provides a light wave of an operating wavelength of a Gigabit Passive Optical Network (GPON); the second light emitting device 902 provides light waves at the operating wavelength of a 10 gigabit Passive Optical Network (XGPON).

The MUX combines the two received optical waves with different wavelengths, and provides the combined optical wave to the multi-wavelength dispersion compensation device 903 after the combined optical wave is processed. The dispersion compensating device 903 may be any one of the multi-wavelength dispersion compensating devices provided in the previous device embodiments. By using the device 903, the optical waves provided by the MUX and including a plurality of operating wavelengths can be subjected to differential dispersion compensation. For example, the optical waves of the operating wavelength corresponding to the first light emitting device 901 and the optical waves of the operating wavelength corresponding to the second light emitting device 902 are dispersion-compensated at different dispersion compensation values, respectively. The multi-wavelength dispersion compensator 903 outputs the optical waves with different dispersion compensated operating wavelengths at an output end p 5.

In practical applications, as a possible implementation manner, the light wave output from the output end p5 can also pass through the optical element and then be transmitted to the outside. The optical element may be a single lens, a group of lenses, a beam shaper, etc.

It should be noted that the light emitting apparatus 90 provided in the present embodiment is described by taking only two light emitting devices 901 and 902 as an example. In practice, at least two light emitting devices providing different operating wavelengths are included in the light emitting device 90.

Fig. 10 is a schematic structural diagram of a light receiving device 100 according to an embodiment of the present application. As shown in fig. 10, the light receiving apparatus 100 includes: a multi-wavelength dispersion compensating device 1001 and a light receiving device 1002. The input end p6 of the multi-wavelength dispersion compensation device 1001 is used for receiving optical waves of multiple operating wavelengths to be dispersion-compensated. The dispersion compensating device 1001 may be any of the multi-wavelength dispersion compensating devices provided in the device embodiments described above. The device 1001 can be used for performing differential dispersion compensation on the received optical waves with various operating wavelengths.

The output terminal p7 of the multi-wavelength dispersion compensating device 1001 is optically connected to the input terminal p8 of the light receiving device 1002. As a possible implementation, the light receiving device 1002 is a photodetector, which can detect a spectrum range including a plurality of operating wavelengths received by the multi-wavelength dispersion compensation device 101. The light receiving device 1002 is used to perform photoelectric conversion on the dispersion-compensated light wave.

In practical applications, if the light receiving device 1002 in the light receiving apparatus 100 has a narrow detectable spectral range and does not cover all the operating wavelengths received by the dispersion compensating device 101, a plurality of light receiving devices need to be used.

The optical receiving apparatus 110 shown in fig. 11 includes therein a multi-wavelength dispersion compensation device 1101, a demultiplexer DMUX, a first optical receiving device 1102, and a second optical receiving device 1103. The dispersion compensation device 1101 may be any of the multi-wavelength dispersion compensation devices provided in the foregoing device embodiments, wherein the input end p9 is used for receiving optical waves of multiple operating wavelengths to be dispersion-compensated, and the output end p10 is optically connected to the input end p11 of the DMUX. The DMUX is used to perform wavelength division processing on the light waves transmitted by the multi-wavelength dispersion compensation device 1101. For example, light waves of two operating wavelengths are transmitted through the port p12 and the port p13, respectively.

Output ports p12 and p13 of the DMUX are optically connected to the first light receiving device 1102 and the second light receiving device 1103, respectively. The first light receiving device 1102 is used for collecting light waves of an operating wavelength and converting the light waves into electric signals; the second light receiving device 1103 is used to collect light waves of another operating wavelength and convert them into electrical signals.

In practical applications, as a possible implementation manner, light waves containing multiple operating wavelengths provided from the outside can be transmitted to the multi-wavelength dispersion compensation devices 1001 and 1101 through the optical element. The optical element may be a single lens, a group of lenses, a beam shaper, etc.

In the above embodiments of the apparatus, as can be seen from fig. 9 to 11, the remaining components except the multi-wavelength dispersion compensation device in the apparatus may be components in an integrated product existing in the wavelength division multiplexing field. That is to say, the multi-wavelength dispersion compensation device provided by the foregoing device embodiment can be integrated into an existing integrated passive optical network product, and performs a function of performing differential dispersion compensation on multiple operating wavelengths.

For example, in a passive Optical network, the Optical transmitting device 90 may be an Optical Line Terminal (OLT) integrated with a multi-wavelength dispersion compensation device. The light emitting device 90 performs dispersion compensation on the light waves of various operating wavelengths in advance, so that even if the light waves are dispersed in the optical fiber after exiting from the light emitting device 90, the dispersion actually occurring can be cancelled out by the advance dispersion compensation. The Optical receiving apparatus 100 or 110 may be an Optical Network Terminal (ONT) that integrates a multi-wavelength dispersion compensation device. The optical receiving apparatus 100 or 110 receives an optical wave from the outside, which has already undergone dispersion, and cancels the dispersion value for each operating wavelength through dispersion compensation processing by the multi-wavelength dispersion compensation device in the apparatus.

Generally, each port has a certain coupling loss, such as 1-2 dB, when the integrated device is led out. In this embodiment, the multi-wavelength dispersion compensator is integrated into the existing integrated passive optical network product, and these coupling ports can be omitted, thereby reducing the coupling loss. In addition, the area of the board and the cost of the product can not be obviously increased, and the function expansion of the existing product is realized.

It should be noted that, in practical applications, the multi-wavelength dispersion compensation device provided in the device embodiment may be applied to not only a terminal device, but also any position in an optical transmission path. For example, between two mutually separable optical devices of an optical transmission path.

Based on the multi-wavelength dispersion compensation device and the related product provided by the foregoing embodiments, correspondingly, the present application also provides an optical signal processing method. The following describes a specific implementation of the method with reference to the embodiments and the drawings. Fig. 12 is a flowchart of an optical signal processing method according to an embodiment of the present application. The method comprises the following steps:

s121: an optical signal to be dispersion compensated is received.

In the present embodiment, the optical signal to be dispersion-compensated includes: a first light wave and a second light wave. Wherein the first light wave and the second light wave have different working wavelengths. In practical applications, the dispersion values of different operating wavelengths are different, and therefore, different dispersion compensation values need to be adopted to perform dispersion compensation on the first optical wave and the second optical wave respectively.

S122: and constructing a first dispersion compensation value corresponding to the first optical wave and a second dispersion compensation value corresponding to the second optical wave by using the multi-wavelength dispersion compensation device.

This step applies any of the multi-wavelength dispersion compensating devices provided by the device embodiments described above. Since the multi-wavelength dispersion compensation device includes a plurality of optical transmission components including the first electrode at the coupling and the second electrode at the non-coupling, the coupling coefficient of each optical transmission component and the phase of light passing through the optical transmission component are adjustable. On the basis, due to the fact that the FSRs of the periodic transmission lines of the at least two optical transmission components are different, dispersion compensation values, namely a first dispersion compensation value and a second dispersion compensation value, can be respectively constructed for the first optical wave and the second optical wave. In the multi-wavelength dispersion compensation device, the first electrode and the second electrode are arranged, so that the construction of a dispersion compensation value has higher controllability, and the dispersion compensation precision and accuracy are improved.

S123: carrying out dispersion compensation on the first optical wave by using the first dispersion compensation value to obtain a first processed optical wave; and performing dispersion compensation on the second optical wave by using the second dispersion compensation value to obtain a second processed optical wave.

Compared with the first optical wave and the second optical wave, the first processed optical wave and the second processed optical wave which are respectively obtained through differential dispersion compensation can improve the optical communication quality.

As a possible implementation manner, S122 may include:

and acquiring target dispersion compensation information corresponding to the first optical wave and the second optical wave respectively, and adjusting the coupling coefficient of an optical transmission component in the multi-wavelength dispersion compensation device and the phase of light passing through the optical transmission component according to the target dispersion compensation information to construct a first dispersion compensation value and a second dispersion compensation value.

Specifically, the first control signal and the second control signal may be provided according to target dispersion compensation information and a mapping table. The mapping relation table includes: a mapping of the dispersion compensation information to the voltage that should be applied across the first and second electrodes.

In addition, real-time dispersion compensation information may also be obtained, and the first control signal and the second control signal may be provided according to a difference between the real-time dispersion compensation information and target dispersion compensation information.

The first control signal is used for being provided for a first electrode of the optical transmission component so as to adjust the coupling coefficient of the optical transmission component; the second control signal is for providing to the second electrode of the optical transmission component to adjust the phase of light passing through the optical transmission component.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (12)

1. A multi-wavelength dispersion compensating device, comprising: a plurality of optical transmission components in cascade;

wherein the free spectral regions of the periodic transmission spectral lines of the at least two light transmission components are different;

the optical transmission component comprises a coupling part and a non-coupling part;

the coupling part comprises a first electrode which is used for adjusting the coupling coefficient of the optical transmission component;

the uncoupled section includes a second electrode for adjusting the phase of light passing through the light delivery component.

2. The multi-wavelength dispersion compensation device according to claim 1, wherein said optical transmission component comprises: the micro-ring resonant cavity is coupled with the bus waveguide at the coupling position, and the position on the micro-ring resonant cavity, which is not coupled with the bus waveguide, is at the non-coupling position;

the perimeters of the micro-ring resonators of the at least two optical transmission assemblies are different.

3. The multi-wavelength dispersion compensation device according to claim 1, wherein said optical transmission component comprises: a micro-ring resonant cavity and a bus waveguide; the micro-ring resonant cavity comprises: a first transmission section and a second transmission section;

the first transmission section is coupled with the bus waveguide, and the first transmission section and the bus waveguide are respectively used as two arms of a Mach-Zehnder interferometer (MZI); the position on the bus waveguide, which is coupled with the first transmission section, is the coupling position, and the non-coupling position is located in the second transmission section;

the perimeters of the micro-ring resonators of the at least two optical transmission assemblies are different.

4. The multiwavelength dispersion compensation device of claim 2 or 3, wherein the bus waveguide is a single bus waveguide, and the pass-through end of the single bus waveguide is the output end of the optical transmission component; or, the bus waveguide is a dual-bus waveguide, and the download end of the dual-bus waveguide is the output end of the optical transmission component.

5. The multi-wavelength dispersion compensation device according to claim 1, wherein said optical transmission component comprises: a Mach-Zehnder interferometer MZI;

the coupling position of the two arms of the MZI is the coupling position, and the position on any one of the two arms, which is not coupled with the other arm, is the non-coupling position;

the MZIs of the at least two optical transmission assemblies differ in arm length.

6. The multiwavelength dispersion compensation device of claim 1, 2, 3 or 5, wherein the first electrode is a pyroelectric electrode or an electro-optical electrode; the second electrode is a hot-light electrode or an electro-light electrode.

7. The multiwavelength dispersion compensation device of claim 1, 2, 3 or 5, further comprising: the first electrode and the second electrode are respectively and electrically connected with the controller;

the controller is used for providing a first control signal to the first electrode so that the first electrode adjusts the coupling coefficient of the optical transmission component according to the first control signal;

the controller is further configured to provide a second control signal to the second electrode, so that the second electrode adjusts the phase of the light passing through the optical transmission component according to the second control signal.

8. The multiwavelength dispersion compensation device of claim 7, wherein the controller is specifically configured to provide the first control signal and the second control signal according to target dispersion compensation information and a mapping table; the mapping relation table includes: a mapping of the dispersion compensation information to the voltage that should be applied across the first and second electrodes.

9. The multiwavelength dispersion compensation device of claim 7, wherein the controller is specifically configured to obtain real-time dispersion compensation information, and to provide the first control signal and the second control signal based on a difference between the real-time dispersion compensation information and target dispersion compensation information.

10. A light emitting apparatus, comprising: the multiwavelength dispersion compensation device of any of claims 1 to 9, further comprising: the first light emitting device, the second light emitting device and the wave combiner; wherein the first light emitting device and the second light emitting device emit light waves of different operating wavelengths; the output end of the first light emitting device and the output end of the second light emitting device are respectively connected with the input end of the wave combiner in an optical mode; the output end of the wave combiner is optically connected with the input end of the multi-wavelength dispersion compensation device, and the output end of the multi-wavelength dispersion compensation device is used for outputting the optical wave after dispersion compensation.

11. A light receiving device characterized by comprising: the multiwavelength dispersion compensation device of any of claims 1 to 9, further comprising: a light receiving device; the input end of the multi-wavelength dispersion compensation device is used for receiving optical waves with various working wavelengths to be subjected to dispersion compensation, the output end of the multi-wavelength dispersion compensation device is optically connected with the input end of the light receiving device, and the light receiving device is used for performing photoelectric conversion on the optical waves subjected to dispersion compensation.

12. An optical signal processing method, comprising:

receiving an optical signal to be dispersion compensated; the optical signal to be dispersion-compensated includes: a first optical wave and a second optical wave, the first optical wave and the second optical wave having different operating wavelengths;

constructing a first dispersion compensation value corresponding to the first optical wave and constructing a second dispersion compensation value corresponding to the second optical wave by using the multi-wavelength dispersion compensation device according to any one of claims 1 to 9;

carrying out dispersion compensation on the first optical wave by using the first dispersion compensation value to obtain a first processed optical wave; and performing dispersion compensation on the second optical wave by using the second dispersion compensation value to obtain a second processed optical wave.

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