CN114609727B - Chip integrated programmable filtering method based on cascade filter - Google Patents
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- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/29395—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device configurable, e.g. tunable or reconfigurable
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Abstract
The invention discloses a chip integrated programmable filtering method, a system and a storage medium based on cascading filters, wherein a plurality of filters are prepared and cascaded in a single chip, the central wavelength and spectral characteristics of each filter are controlled through a chip integrated circuit, and the performance indexes such as the transmission spectrum shape, the full width at half maximum, the central wavelength, the extinction ratio and the like of the cascading filters are provided with programmable adjusting capability. The invention solves the problem that the traditional filter can only tune the short plate of the center wavelength, establishes the compiling corresponding relation between the digital logic and the filtering spectrum, can improve the flexible and adjustable capability of the photoelectric information system in the aspect of frequency domain processing, and can provide important reference for the research and development of the software-defined photoelectric information system.
Description
Technical Field
The invention belongs to the field of interdisciplinary fields of integrated optics, optical communication and microwave photonics, in particular to a chip integrated filtering method which realizes programmable transmission spectrum by cascading a plurality of filters and independently tuning the center wavelength of each filter, and particularly relates to a chip integrated programmable filtering method, a system and a storage medium based on cascading filters.
Background
The photoelectric information system refers to a complex system for performing information processing functions through photoelectric devices, and includes an optical communication system, an optical switching system, an all-optical signal processing system, an optical computer, and a microwave photon system. The traditional photoelectric information system is mainly realized through a free space optical path or an all-fiber optical path, an optical field carrying information is transmitted in the free space or the fiber, and an external circuit is used for controlling a photoelectric device to realize optical field regulation. However, the free space optical path and the all-fiber optical path face the problems of large system volume, poor stability, difficult coordination control, slow upgrading and updating speed and the like, and are difficult to develop large-scale application in the environment outside a laboratory. More importantly, the loose coupling integration mode of each photoelectric device seriously increases the design difficulty of a control circuit of a traditional photoelectric information system. On the other hand, chip integrated optoelectronic devices including optical modulators, optical filters, directional couplers, wavelength division multiplexers have performance metrics that are no worse than conventional discrete optoelectronic devices, due to the rapid development of the fabrication process of the chip integrated optoelectronic devices. The single-chip photoelectric information system has the advantages of small volume, low power consumption, strong stability, batch preparation and the like. In particular, the chip integrated optical circuit is highly compatible with the chip integrated circuit manufacturing process, so that the single-chip integrated photoelectric information system is possible, and the programmable design capability of the photoelectric information system is provided through the chip integrated logic circuit.
Optical filters are widely used in optoelectronic information systems, and typical applications include wavelength division multiplexing optical communications, optical fourier transforms, microwave photon signal shaping, and the like. The main performance indexes of the measuring optical filter comprise center wavelength, full width at half maximum, extinction ratio, transmission spectrum shape and the like, and the adjustability of each parameter directly influences the flexible control capability of typical application.
Disclosure of Invention
Based on the problems of the prior art, the invention provides a chip integrated programmable filtering method based on cascaded filters, and the technical problem to be solved by the invention is how to prepare integrated multiple discrete filters on a single chip, wherein the structures of the filters can be the same or different, the filters can independently tune the central wavelength through control voltage, the filters are cascaded in sequence by using chip integrated waveguides, and the specific filtering function of programmable design is realized by changing the control voltage distribution.
In order to achieve the above effects, the chip integrated programmable filtering method based on the cascade filter provided by the invention comprises the following steps:
Step one, preparation, cascading and independent control of filters, namely preparing and integrating a plurality of discrete filters on a single chip, realizing independent tuning of the central wavelength of each filter through externally connecting bias voltage, and cascading each filter in sequence by using a chip integrated waveguide;
And step two, realizing a programmable filtering function, namely loading digital logic control voltage distribution to each photoelectric device, and realizing a flexible and controllable filtering function with adjustable center wavelength, controllable full width at half maximum, selectable spectrum shape and multiplicable extinction ratio.
Preferably, the method specifically comprises the following steps:
s101, preparing a waveguide structure of the discrete filter,
S102, preparing a grating coupler to guide a signal light field into or out of a chip;
s102, preparing each filter control electrode;
s103, realizing programmable control of each parameter.
Preferably, the step S101 prepares a waveguide structure of a discrete filter by using a standard preparation process of a chip integrated optical path, and each filter is connected with a transmission waveguide by a path selection optical path.
Preferably, in step S103, each filter control electrode is prepared by a standard process of a chip integrated circuit, and the control electrode is connected to the pin electrode by using an integrated wire.
Preferably, in the step S104, the digital logic control voltage is loaded onto each optoelectronic device through the pin electrode, and the reference port output spectrum is utilized to modify the output port of the filtering port, so as to realize the programmable control of each parameter.
Preferably, the above parameters include, but are not limited to, center wavelength, full width at half maximum, spectral shape, extinction ratio.
Preferably, the filter is prepared by a standard process of a chip integrated optical circuit, has a certain degree of freedom of structural design, efficiently and nondestructively transmits an optical field, has a certain band-pass or band-stop capacity in a frequency domain, realizes transmission spectrum tuning by changing the refractive index of a waveguide, changes the refractive index of a transmission waveguide in the filter structure to realize the central wavelength tuning of the filter, and is connected to an external logic circuit through a control electrode, an integrated lead and a pin electrode.
Preferably, the output filter parameters are flexibly changed by changing bias voltage distribution on a plurality of control electrodes, and conversion from mathematical logic to filter parameters is realized according to logic definition, bias voltage distribution, center wavelength of a discrete filter and order of normalized filter spectrum.
A system for realizing the chip integrated programmable filtering method based on the cascade filter comprises a grating coupler, a filtering system, an optical beam splitter, a transmission waveguide, a plurality of electrodes, a micro-ring cavity discrete filter and an array waveguide grating discrete filter,
The signal light field is input into a filtering system through a grating coupler, is transmitted along different transmission paths after passing through a path selection light path consisting of an optical beam splitter, a transmission waveguide and an electrode, and is finally output by different grating couplers through two types of discrete filters of a micro-ring cavity and an array waveguide grating;
Preparing and integrating a plurality of discrete filters on a single chip, realizing independent tuning of the central wavelength of each filter through externally connecting bias voltage, and cascading each filter in sequence by using a chip integrated waveguide;
Loading digital logic control voltage distribution to each photoelectric device to realize flexible controllable filtering functions with adjustable center wavelength, controllable full width at half maximum, selectable spectrum shape and multiplicable extinction ratio;
preparing a discrete filter waveguide structure through a chip integrated optical path standard preparation process, wherein each filter is connected with a transmission waveguide through a path selection optical path, and a grating coupler is prepared to guide a signal optical field into or out of a chip;
Preparing control electrodes of each filter by using a standard process of a chip integrated circuit, and connecting the control electrodes with the pin electrodes by using an integrated lead;
And loading the digital logic control voltage to each photoelectric device through the pin electrode, and utilizing the reference port to output the spectrum correction filter port output port to realize the programmable control of each parameter.
A computer readable storage medium having stored thereon a computer program which when executed by a processor implements the above method.
Compared with the prior art, the invention extends the degree of freedom of the filter from the traditional center wavelength to the full width at half maximum, extinction ratio and spectral shape, effectively improves the processing capacity of the optical signal frequency domain, and provides a brand new idea for a software-defined photoelectric information system controlled by a chip integrated logic circuit.
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In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are needed to be used in the embodiments of the present invention will be briefly described, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic diagram of the cascaded filter-based chip integrated programmable filter system of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The invention provides an embodiment of a chip integrated programmable filtering method based on a cascading filter, which comprises the following steps:
Step one, preparation, cascading and independent control of filters, namely preparing and integrating a plurality of discrete filters on a single chip, realizing independent tuning of the central wavelength of each filter through externally connecting bias voltage, and cascading each filter in sequence by using a chip integrated waveguide;
And step two, realizing a programmable filtering function, namely loading digital logic control voltage distribution to each photoelectric device, and realizing a flexible and controllable filtering function with adjustable center wavelength, controllable full width at half maximum, selectable spectrum shape and multiplicable extinction ratio.
In some embodiments, the method specifically comprises:
s101, preparing a waveguide structure of the discrete filter,
S102, preparing a grating coupler to guide a signal light field into or out of a chip;
S103, preparing each filter control electrode;
s104, realizing programmable control of each parameter.
In some embodiments, step S101 prepares a discrete filter waveguide structure by a chip integrated optical circuit standard preparation process, and the filters are connected by a path selection optical circuit and a transmission waveguide.
In some embodiments, step S103 prepares each filter control electrode by standard processes of chip integrated circuits, and connects the control electrode with the pin electrode using an integrated wire.
In some embodiments, step S104 loads the digitally-logic control voltage onto each optoelectronic device through the pin electrode, and utilizes the reference port output spectrum to modify the filter port output port, thereby implementing programmable control of each parameter.
In some embodiments, the parameters include, but are not limited to, center wavelength, full width at half maximum, spectral shape, extinction ratio.
In some embodiments, the optical filter is prepared through a standard chip integrated optical path process, has a certain degree of freedom of structural design, efficiently transmits an optical field without damage, has a certain band-pass or band-stop capability in a frequency domain, realizes transmission spectrum tuning by changing the refractive index of a waveguide, changes the refractive index of a transmission waveguide in a filter structure to realize filter center wavelength tuning, and is connected to an external logic circuit through a control electrode-integrated lead-pin electrode.
In some embodiments, the conversion from mathematical logic to filtering parameters is accomplished in the order of logic definition, bias voltage distribution, discrete filter center wavelength, normalized filtering spectrum by varying bias voltage distribution on a plurality of control electrodes, allowing flexible variation of output filtering parameters.
The invention provides a system for realizing a chip integrated programmable filtering method based on a cascade filter, which comprises a grating coupler, a filtering system, an optical beam splitter, a transmission waveguide, a plurality of electrodes, a micro-ring cavity discrete filter and an array waveguide grating discrete filter,
The signal light field is input into a filtering system through a grating coupler, is transmitted along different transmission paths after passing through a path selection light path consisting of an optical beam splitter, a transmission waveguide and an electrode, and is finally output by different grating couplers through two types of discrete filters of a micro-ring cavity and an array waveguide grating;
Preparing and integrating a plurality of discrete filters on a single chip, realizing independent tuning of the central wavelength of each filter through externally connecting bias voltage, and cascading each filter in sequence by using a chip integrated waveguide;
Loading digital logic control voltage distribution to each photoelectric device to realize flexible controllable filtering functions with adjustable center wavelength, controllable full width at half maximum, selectable spectrum shape and multiplicable extinction ratio;
preparing a discrete filter waveguide structure through a chip integrated optical path standard preparation process, wherein each filter is connected with a transmission waveguide through a path selection optical path, and a grating coupler is prepared to guide a signal optical field into or out of a chip;
Preparing control electrodes of each filter by using a standard process of a chip integrated circuit, and connecting the control electrodes with the pin electrodes by using an integrated lead;
And loading the digital logic control voltage to each photoelectric device through the pin electrode, and utilizing the reference port to output the spectrum correction filter port output port to realize the programmable control of each parameter.
As shown in fig. 1, an embodiment of a chip-integrated programmable filtering system prepared by a silicon-on-insulator process is shown to describe a cascade interferometer-based chip-integrated programmable filtering method. The signal light field is input into a filtering system through a grating coupler, is transmitted along different transmission paths after passing through a path selection light path (essentially Mach-Zehnder interferometer) consisting of an optical beam splitter, a transmission waveguide and an electrode, passes through two types of discrete filters of a micro-ring cavity and an array waveguide grating, and is finally output by different grating couplers.
The voltage distribution of the electrodes 1,2, 3 determines the transmission path of the signal light field: when the electrode 1 takes a logic value of 0 (i.e. no bias voltage is applied), the signal light field can be output from the grating coupler ① (the electrode 2 takes a logic value of 0) or ② (the electrode 2 takes a logic value of 1); when electrode 1 goes to a logic value of 1 (i.e., a bias voltage is applied), the signal light field may be output from grating coupler ③ (electrode 3 takes a logic value of 0) or ④ (electrode 3 takes a logic value of 1). The correspondence between the logical values of the electrodes 1,2, 3 and the type of the cascade filter is shown in table 1, and a normalized filter spectrum (each filter parameter can be described) can be obtained by comparing the output spectrum of the filter port ②～④ with the output spectrum of the reference ①.
The electrodes 4-9 can control the discrete filter center wavelength and change the normalized filter spectrum. Specifically, when the electrode 4 and the electrode 5 both take a logic value of 0, the central wavelength of the transmission spectrum (rectangular band-pass spectrum in an ideal state) of the cascaded array waveguide grating is kept unchanged, the full width at half maximum is kept unchanged, and the extinction ratio is doubled; when the electrode 4 and the electrode 5 respectively take logic values of 1 and 0, the original full width at half maximum and full width at half maximum of the transmission spectrum center wavelength of the cascaded array waveguide grating are red shifted by one fourth, and the extinction ratio is doubled; when the electrode 4 and the electrode 5 both take logical value 1, the half-height full width of the transmission spectrum center wavelength red shift of the cascade array waveguide grating is half, the half-height full width is unchanged, and the extinction ratio is doubled. Similarly, the normalized filter spectrum of the cascade micro-ring cavity can be adjusted by the logic values of the electrodes 6 and 7, and the normalized filter spectrum of the micro-ring cavity and the arrayed waveguide grating can be adjusted by the logic values of the electrodes 8 and 9.
Table 1 correspondence between electrode logic values and discrete filter types
| Output port | Electrode 1 logic value | Electrode 2 logic value | Electrode 3 logic value | Cascaded discrete filter types |
| ① | 0 | 0 | - | Reference port (Filter-less) |
| ② | 0 | 1 | - | Cascaded arrayed waveguide grating |
| ③ | 1 | - | 0 | Cascaded micro-ring cavity |
| ④ | 1 | - | 1 | Micro-ring cavity + array waveguide grating |
The performance indexes such as the transmission spectrum shape, the full width at half maximum, the center wavelength, the extinction ratio and the like can be flexibly adjusted through the control electrode; the input item is compiling logic, the output item is normalized filtering spectrum, and the programmable characteristic of the chip integrated filtering system is reflected in the process. In particular, when the electrodes 4-9 are valued in a discrete manner, i.e. the bias voltage can be freely adjusted within a certain range, the filtering system shown in fig. 1 will have a greater programmable capacity, i.e. a more flexible degree of freedom of adjustment.
The invention provides an embodiment of a chip integrated programmable filtering method based on a cascading filter, which comprises the following steps:
s201, preparing a discrete filter waveguide structure through a chip integrated optical path standard preparation process, wherein each filter is connected with a transmission waveguide through a path selection optical path, and a preparation grating coupler guides a signal optical field into or out of a chip;
s202, preparing control electrodes of each filter through a standard process of a chip integrated circuit, and connecting the control electrodes with pin electrodes by utilizing an integrated lead;
S203, loading digital logic control voltage to each photoelectric device through a pin electrode, and outputting a spectrum correction filter port output port by utilizing a reference port to realize programmable control of parameters such as center wavelength, full width at half maximum, spectrum shape, extinction ratio and the like.
The invention provides an embodiment of a chip integrated programmable filtering method based on cascading filters, which is characterized in that a plurality of filters are prepared and cascaded on a single chip, and each filter is controlled by a chip integrated logic circuit so that filtering parameters such as a transmission spectrum shape, a full width at half maximum, a central wavelength, a extinction ratio and the like have programmable control properties. The invention expands the tuning freedom of the traditional filter, effectively improves the frequency domain signal processing capability of the chip integrated photoelectric information system, and provides an important reference for the software defined photoelectric information system.
The invention provides an embodiment of a chip integrated programmable filtering method based on cascading filters, which is characterized in that a plurality of filters are prepared and cascaded on a single chip, and each filter is controlled by a chip integrated logic circuit so that filtering parameters such as a transmission spectrum shape, a full width at half maximum, a central wavelength, a extinction ratio and the like have programmable control properties.
In some embodiments, the chip integrated filter can be prepared through a chip integrated optical path standard process, has a certain degree of freedom of structural design, can efficiently and nondestructively transmit an optical field, has a certain band-pass or band-stop capability in a frequency domain, can realize transmission spectrum tuning through changing a waveguide refractive index, and has a tuning basic principle including but not limited to a thermo-optical effect, an electro-optical effect, a photoelectric effect and the like, and the structure includes but not limited to an array waveguide grating, a Mach-Zehnder interferometer, a micro-ring cavity, an echo wall micro-disc cavity, a photonic crystal slow light micro-cavity, a Fabry-Perot cavity, a Bragg grating and the like, and the cascaded filter can have the same structure or different structures, and the material platform used includes but not limited to silicon on insulator, hydrogen-loaded amorphous silicon, silicon nitride, silicon carbide, chalcogenide glass, III-V-AlGaAs, III-V-InP and the like, and the single material integration method can be adopted, and the multi-material mixed integration method can be adopted;
In some embodiments, the chip integrated logic circuit can be prepared through a standard process of the chip integrated circuit, has a certain degree of freedom of structural design, can change the refractive index of a transmission waveguide in a filter structure to realize the central wavelength tuning of the filter, can be connected to an external logic circuit through a control electrode-integrated lead-pin electrode, can receive bias voltages with different intensities, and does not limit the structural dimensions and wiring parameters of the control electrode, the integrated lead and the pin electrode and does not limit the interface definition principle and the logic compiling mode.
In some embodiments, the programmable filtering can flexibly change the filtering parameters such as the output transmission spectrum shape, the full width at half maximum, the center wavelength, the extinction ratio and the like by changing the bias voltage distribution on a plurality of control electrodes, and can realize the conversion from mathematical logic (input quantity) to filtering parameters (output quantity) according to the sequence of logic definition, bias voltage distribution, center wavelength of a discrete filter and normalized filtering spectrum; the programmable input quantity can be binary logic, discrete logic or continuous variable, is not limited by programming language, interface definition and compiling rule, is not limited by the type, the characteristics and the quantity of normalized filtering spectrums in the output quantity set, and is not limited by the specific structure and the implementation mode of the programmable filtering system.
Compared with the prior art, the invention has the following advantages:
firstly, the traditional discrete filter has only one tuning degree of freedom of the center wavelength, and is difficult to meet the use requirement of complex frequency domain signal processing of the photoelectric information system, and the invention provides a concept of cascading and independently adjusting the discrete filter, so that the tuning degree of freedom is expanded to other parameters such as a transmission spectrum shape, a full width at half maximum, an extinction ratio and the like, and the frequency domain signal processing capability of the photoelectric information system is greatly improved;
Secondly, the invention provides a logic programmable filtering concept and an optimal technical route of a photoelectric hybrid integrated chip, a compiling corresponding relation is established between digital logic and a filtering spectrum, and a solid foundation is laid for accurate, standardized and diversified frequency domain information processing;
In addition, the invention provides a brand new idea for the design of high-efficiency photoelectric devices and large-scale photoelectric information systems, and related ideas can provide important references for the research and development of software-defined photoelectric information systems.
For convenience of description, the above devices are described as being functionally divided into various units, respectively. Of course, the functions of each element may be implemented in the same piece or pieces of software and/or hardware when implementing the present application.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (4)
1. A chip integrated programmable filtering method based on a cascading filter comprises the following steps:
Step one, preparation, cascading and independent control of filters, namely preparing and integrating a plurality of discrete filters on a single chip, realizing independent tuning of the central wavelength of each filter through externally connecting bias voltage, and cascading each filter in sequence by using a chip integrated waveguide;
Step two, realizing a programmable filtering function, namely loading digital logic control voltage distribution to each photoelectric device to realize a flexible controllable filtering function with adjustable center wavelength, controllable full width at half maximum, selectable spectrum shape and multiplicable extinction ratio; the input item is compiling logic, the output item is normalized filtering spectrum, and the method specifically comprises the following steps:
S101, preparing a discrete filter waveguide structure through a chip integrated optical path standard preparation process, wherein each filter is connected with a transmission waveguide through a path selection optical path;
s102, preparing a grating coupler to guide a signal light field into or out of a chip;
s103, preparing control electrodes of each filter through a standard process of a chip integrated circuit, and connecting the control electrodes with the pin electrodes by utilizing an integrated lead;
S104, loading digital logic control voltage onto each photoelectric device through a pin electrode, and utilizing a reference port output spectrum to correct a filter port output port to realize programmable control of each parameter;
The programmable filtering function is realized by a system and comprises a grating coupler, a filtering system, an optical beam splitter, a transmission waveguide, a plurality of electrodes, a micro-ring cavity discrete filter and an array waveguide grating discrete filter, wherein a signal light field is input into the filtering system through the grating coupler, is transmitted along different transmission paths after passing through a path selection light path consisting of the optical beam splitter, the transmission waveguide and the electrodes, passes through the micro-ring cavity discrete filter and the array waveguide grating discrete filter, and is finally output by different grating couplers; the electrode comprises a first electrode, a second electrode, a third electrode, a fourth electrode, a fifth electrode, a sixth electrode, a seventh electrode, an eighth electrode and a ninth electrode, wherein the voltage distribution of the first electrode, the second electrode and the third electrode determine the transmission path of a signal light field, the fourth electrode and the fifth electrode control the spectral center wavelength, the full width at half maximum and the extinction ratio of a cascaded array waveguide grating, the sixth electrode and the seventh electrode adjust the normalized filter spectrum of a cascaded micro-ring cavity, and the eighth electrode and the ninth electrode adjust the normalized spectrum of the micro-ring cavity and the array waveguide grating.
2. The cascading filter-based chip integrated programmable filtering method according to claim 1, wherein the method is prepared by a chip integrated optical path standard process, has a certain degree of freedom of structural design, efficiently transmits an optical field without loss, has a certain band-pass or band-stop capability in a frequency domain, realizes transmission spectrum tuning by changing a refractive index of a waveguide, and changes a refractive index of a transmission waveguide in a filter structure to realize filter center wavelength tuning, and is connected to an external logic circuit through a control electrode-integrated wire-pin electrode.
3. The cascading filter-based chip integrated programmable filtering method of claim 1, wherein the output filtering parameters are flexibly changed by changing bias voltage distribution on a plurality of control electrodes, and the conversion from mathematical logic to filtering parameters is realized according to logic definition, bias voltage distribution, center wavelength of discrete filter and order of normalized filtering spectrum.
4. A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the method of any of claims 1-3.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103576345A (en) * | 2013-10-28 | 2014-02-12 | 华中科技大学 | Programmable optical filter based on integrated silicon waveguide |
| CN104865772A (en) * | 2015-06-09 | 2015-08-26 | 兰州大学 | Three-valued optical reversible logic device based on microring resonators |
| CN105515677A (en) * | 2015-12-03 | 2016-04-20 | 武汉邮电科学研究院 | Silicon photonics integration multi-wavelength optical sending and receiving module |
| CN106707657A (en) * | 2015-07-31 | 2017-05-24 | 兰州大学 | Control swap gate optical logic device based on micro-ring resonators |
| CN109100310A (en) * | 2018-07-09 | 2018-12-28 | 中国电子科技集团公司信息科学研究院 | A kind of super spectrographic detection micro-system |
| CN110198189A (en) * | 2019-07-11 | 2019-09-03 | 军事科学院***工程研究院网络信息研究所 | Higher-dimension multiplexed quantum communication system based on integrated chip optical path |
| CN110376821A (en) * | 2019-07-11 | 2019-10-25 | 军事科学院***工程研究院网络信息研究所 | A kind of chipset based on optical Kerr effect helps light phase modulation method |
| CN111510225A (en) * | 2020-03-20 | 2020-08-07 | 军事科学院***工程研究院网络信息研究所 | Quantum communication networking method and system based on multi-wavelength entangled light source |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6673497B2 (en) * | 2000-01-04 | 2004-01-06 | University Of Central Florida | High efficiency volume diffractive elements in photo-thermo-refractive glass |
| US7039258B2 (en) * | 2003-08-15 | 2006-05-02 | Luxtera, Inc. | Distributed amplifier optical modulators |
| US7231113B2 (en) * | 2005-08-19 | 2007-06-12 | Infinera Corporation | Coupled optical waveguide resonators with heaters for thermo-optic control of wavelength and compound filter shape |
| US7970244B2 (en) * | 2006-09-11 | 2011-06-28 | The Boeing Company | Fabrication of an optical ring resonator device |
| CN108496315B (en) * | 2016-07-22 | 2019-11-22 | 华为技术有限公司 | A kind of optical add/drop multiplexer and its control method, transceiver |
| US10670939B2 (en) * | 2017-12-27 | 2020-06-02 | Elenion Technologies, Llc | Wavelength locker |
-
2020
- 2020-12-08 CN CN202011445258.4A patent/CN114609727B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103576345A (en) * | 2013-10-28 | 2014-02-12 | 华中科技大学 | Programmable optical filter based on integrated silicon waveguide |
| CN104865772A (en) * | 2015-06-09 | 2015-08-26 | 兰州大学 | Three-valued optical reversible logic device based on microring resonators |
| CN106707657A (en) * | 2015-07-31 | 2017-05-24 | 兰州大学 | Control swap gate optical logic device based on micro-ring resonators |
| CN105515677A (en) * | 2015-12-03 | 2016-04-20 | 武汉邮电科学研究院 | Silicon photonics integration multi-wavelength optical sending and receiving module |
| CN109100310A (en) * | 2018-07-09 | 2018-12-28 | 中国电子科技集团公司信息科学研究院 | A kind of super spectrographic detection micro-system |
| CN110198189A (en) * | 2019-07-11 | 2019-09-03 | 军事科学院***工程研究院网络信息研究所 | Higher-dimension multiplexed quantum communication system based on integrated chip optical path |
| CN110376821A (en) * | 2019-07-11 | 2019-10-25 | 军事科学院***工程研究院网络信息研究所 | A kind of chipset based on optical Kerr effect helps light phase modulation method |
| CN111510225A (en) * | 2020-03-20 | 2020-08-07 | 军事科学院***工程研究院网络信息研究所 | Quantum communication networking method and system based on multi-wavelength entangled light source |
Non-Patent Citations (4)
| Title |
|---|
| nonclassical optical bistability and resonance-locked regime of photon-pair sources using silicon microring resonator;Kai guo等;《physical review applied》;第11卷(第3期);全文 * |
| resonance-splitting and enhanced notch depth in SOI ring resonators with mutual mode coupling;Ziyang Zhang等;《optical express》;第3卷(第4期);全文 * |
| 可重构自耦合微环辅助的MZI集成光子滤波器;郑鹏飞等;《光学精密工程》(第1期);全文 * |
| 硅基微环腔相关光子对光源输出特性研究;李克超等;《量子电子学报》(第6期);全文 * |
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