CN114710207B - Wavelength self-adaptive matching terminal, system and method applied to multi-wavelength free matching laser communication - Google Patents
Wavelength self-adaptive matching terminal, system and method applied to multi-wavelength free matching laser communication Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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- H04B10/501—Structural aspects
- H04B10/506—Multiwavelength transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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Abstract
A wavelength self-adaptive matching terminal, a system and a method applied to multi-wavelength free matching laser communication belong to the technical field of laser communication. The invention solves the problem that the wavelength in the laser communication terminal of the existing multi-wavelength matching communication network system can not be freely matched. The terminal comprises a multi-wavelength transmitting module and a multi-wavelength receiving module, wherein the multi-wavelength transmitting module can transmit laser signals with at least two wavelengths, the multi-wavelength receiving module can receive the laser signals with any one wavelength transmitted by the multi-wavelength transmitting module, the multi-wavelength receiving module can acquire wavelength data of the multi-wavelength receiving module according to the received laser signals and transmit the wavelength data to the multi-wavelength transmitting module, and the multi-wavelength transmitting module can transmit the laser signals with corresponding wavelengths according to the received wavelength data.
Description
Technical Field
The invention relates to the technical field of laser communication, in particular to a wavelength self-adaptive matching terminal, a system and a method applied to multi-wavelength free matching laser communication.
Background
The space laser communication has the characteristics of high communication rate and strong anti-interference capability, but because the divergence angle of the communication laser beams is smaller, in order to ensure the self receiving and transmitting isolation degree of the system during duplex communication, the receiving and transmitting lasers of the laser communication system are mostly configured in the same-band different-wavelength mode, and the receiving and transmitting isolation of the system is realized by combining the narrow-band optical filters with corresponding wavelengths, so that the laser wavelengths received and transmitted by two communication parties are required to be strictly corresponding, and two communication terminals have a strict wavelength matching relationship. Therefore, in practical applications, many scenarios require duplex communication capability between two or more laser communication terminals, so as to realize that different nodes can communicate at one point.
Therefore, the existing multi-wavelength matching communication network system has the following defects: the wavelength matching between any communication network systems cannot be realized, namely the free pairing communication cannot be completed.
In summary, although the existing multi-wavelength matching communication network system can achieve the purpose of laser communication, free pairing communication still cannot be completed.
Therefore, in the prior art, the free pairing of wavelengths in the laser communication terminal for the existing multi-wavelength matching communication network system cannot be completed, for example: patent document CN112543059a discloses a "common-receive optical path wireless laser communication networking antenna", in which a plurality of tracking and aiming units and communication and detection units are connected through a common optical unit, and the tracking and aiming units and the communication and detection units are flexibly matched according to the spatial position and communication wavelength of a communication target, so as to realize simultaneous communication with a plurality of targets. The technical scheme disclosed in the patent document only can solve the problem that the tracking and aiming unit is matched with the communication and detection unit, and does not clearly suggest the technical scheme that the free pairing communication cannot be completed by laser communication. Patent document CN113839714a discloses a "communication light receiving and transmitting integrated space laser communication terminal", which adopts communication light to replace beacon light, realizes a receiving and transmitting common optical path, and realizes great simplification of a receiving and transmitting optical path structure. The patent document can greatly simplify the structure of a receiving and transmitting optical path, and the technical scheme of the patent document can not provide a solution for the fact that free pairing cannot be completed for laser communication.
In the prior art, feng Yi et al published paper "routing and wavelength distribution algorithm of multi-wavelength all-optical ring network" in the year 08, a multi-wavelength related technology is proposed for a wired optical communication system, mainly based on the premise of known optical signal wavelength, the transmitted and received laser wavelengths are obtained through a matching algorithm, and then the receiving and transmitting ends are controlled by a control method to be simultaneously switched to the matched wavelengths to realize communication. However, the method needs to obtain the wavelength of the light for communication first, then obtain the wavelength of the transmitting end and the receiving end during communication through a matching algorithm, and finally synchronously control the wavelength of the transmitting end and the receiving end. First, the method is only applicable to a wired optical communication system, and is not applicable to a wireless communication system; secondly, the method needs to know the wavelength for communication first; finally, this method requires complex algorithms to obtain the wavelength at the transmitting and receiving ends.
In a wireless laser communication system of free networking, in order to ensure that any two terminals can perform laser communication at any time, the terminals are required to be provided with at least two laser transceiving wavelength combinations, the laser communication and the receiving adopt different wavelengths, the two terminals select respective laser transceiving wavelength combinations to enable the receiving wavelength and the transmitting wavelength between the two terminals to be consistent, full duplex communication is realized, and meanwhile, the communication transceiving isolation of the terminals is ensured. Because there is no other auxiliary communication link between two laser communication terminals except the laser link, before the laser communication link is established, information transmission between the two communication terminals cannot be performed, the wavelength combination state of the other party cannot be known, and the wavelength combination of the two terminals for transmitting and receiving laser cannot be determined, so that the laser link between the two terminals cannot be established, and communication cannot be performed. Therefore, in a free networking laser communication system with multiple wavelength combinations, how to realize the wavelength self-adaptive matching of the system without auxiliary communication becomes a core key problem of the establishment of a communication link of the system, and is a precondition of whether the system can realize laser communication.
Disclosure of Invention
The invention solves the problem that the wavelength in the laser communication terminal of the existing multi-wavelength matching communication network system can not be freely matched.
The invention discloses a wavelength self-adaptive matching terminal applied to multi-wavelength free matching laser communication, which comprises a multi-wavelength transmitting module and a multi-wavelength receiving module, wherein the multi-wavelength transmitting module can transmit laser signals with at least two wavelengths, the multi-wavelength receiving module can receive the laser signals with any one wavelength transmitted by the multi-wavelength transmitting module, the multi-wavelength receiving module can acquire wavelength data of the multi-wavelength receiving module according to the received laser signals and transmit the wavelength data to the multi-wavelength transmitting module, and the multi-wavelength transmitting module can transmit the laser signals with corresponding wavelengths according to the received wavelength data.
Further, in one embodiment of the present invention, the multi-wavelength transmitting module includes a multi-wavelength laser signal transmitting part capable of transmitting laser signals of at least two wavelengths, and an optical switch for selecting input laser signals of corresponding wavelengths according to received wavelength data to transmit output.
Further, in one embodiment of the present invention, the multi-wavelength laser signal emitting means comprises at least two laser emitters, each for emitting a laser signal of one wavelength.
Further, in an embodiment of the present invention, the multi-wavelength receiving module includes a receiving lens, a filtering rotation structure and a receiving detector, the filtering rotation structure is capable of filtering laser signals with different wavelengths through rotation, the laser signals received through the receiving lens are transmitted to the filtering rotation structure, filtered by the filtering rotation structure and output to the receiving detector, and the receiving detector outputs wavelength data to the multi-wavelength transmitting module.
Further, in one embodiment of the present invention, the multi-wavelength receiving module further includes a filter rotating structure control unit, where the filter rotating structure control unit is configured to control the filter rotating structure to rotate at a constant speed, and is further configured to control the filter rotating structure to rotate to a position where the laser signal of the wavelength data is transmitted and stop when the wavelength data is received, and the receiving detector further transmits the wavelength data to the filter rotating structure control unit.
Further, in one embodiment of the present invention, the optical filtering rotating structure includes a narrowband optical filter rotating disc and a plurality of narrowband optical filters, the narrowband optical filter rotating disc is uniformly provided with a plurality of through holes along the circumference, the number of the through holes is 1 more than that of the narrowband optical filters, one narrowband optical filter is embedded and fixed in each through hole, and the through hole without embedded narrowband optical filters is a neutral position.
Further, in one embodiment of the present invention, the optical filtering rotating structure includes a narrowband optical filter rotating disc and a plurality of narrowband optical filters, wherein a plurality of through holes are uniformly distributed on the narrowband optical filter rotating disc along the circumference, the number of the through holes is twice that of the narrowband optical filters, the plurality of narrowband optical filters are uniformly distributed and fixed in the through holes, and a through hole is left between two adjacent narrowband optical filters as a neutral position.
The invention discloses a multi-wavelength free matching laser communication system, which comprises two terminals, namely a terminal A and a terminal B, wherein the terminals are any one wavelength self-adaptive matching terminals in the method.
The invention relates to a multi-wavelength free matching communication method applied to a multi-wavelength free matching laser communication system, which comprises the following steps:
the optical filtering rotating structures in the terminal A and the terminal B are rotated to neutral positions, so that laser signals received by the receiving lens can be directly transmitted to an optical signal receiving end of the receiving detector;
the terminal A and the terminal B are initially aligned;
the terminal A selects a laser signal with one wavelength to emit and output through an optical change-over switch in the terminal A;
after receiving the laser signal, the terminal B controls the filter rotating structure in the terminal B to rotate, and controls the filter rotating structure to stop to a designated position according to the change of the optical signal received by the receiving detector, so that a filter which is in the filter rotating structure and is suitable for the wavelength of the received laser signal is positioned between the receiving lens and the receiving detector, and the filter selection of the terminal B is completed;
the terminal B controls a switching switch in the terminal B to select the laser signal with the corresponding wavelength to transmit according to the wavelength of the received laser signal;
after receiving the laser signal, the terminal A controls the rotation of an internal optical filtering rotating structure, and controls the optical filtering rotating structure to stop to a designated position according to the change of the optical signal received by the receiving detector, so that an optical filter in the optical filtering rotating structure, which is suitable for the wavelength of the received laser signal, is positioned between a receiving lens and the receiving detector, and the optical filter selection of the terminal A is completed; and the establishment of the communication links of the terminal A and the terminal B is realized.
Further, in an embodiment of the present invention, the method for performing initial alignment between the terminal a and the terminal B is: and adjusting the receiving lens of the terminal A so that a receiving detector in the terminal A can receive the laser signal sent by the terminal B, and then adjusting the receiving lens of the terminal B so that the terminal B can receive the laser signal sent by the terminal A, thereby completing initial alignment.
The invention solves the problem that the wavelength in the laser communication terminal of the existing multi-wavelength matching communication network system can not be freely matched. The method has the specific beneficial effects that:
the wavelength self-adaptive matching terminal applied to multi-wavelength free matching laser communication has the advantages that:
1. the multi-wavelength transmitting module and the multi-wavelength receiving module can respectively realize the transmission and the reception of multi-wavelength laser signals, and the multi-wavelength receiving module can automatically identify the wavelength of the received laser signals and then adjust the multi-wavelength transmitting module to transmit the laser signals with corresponding wavelengths, thereby realizing automatic wavelength adjustment.
2. The multi-wavelength receiving module in the terminal adopts a filtering rotating structure to realize the function of automatically identifying the wavelength of the received laser signal, and has simple structure and accurate identification. The optical filter is switched, the narrowband optical filter can automatically identify the wave band of the received communication laser signal, and then the wave band of the corresponding laser signal is matched according to the wave band of the received communication laser signal.
3. The multi-wavelength transmitting module in the terminal adopts optical switch switching to realize the selection of the wavelength of the transmitted laser signal, thereby automatically realizing the autonomous matching of the wavelength of the transmitted laser signal.
Two narrow-band optical filters are arranged on the narrow-band optical filter rotating disc of the terminal, the two narrow-band optical filters are arranged at intervals, and a neutral gear is designed in the middle to enable laser to directly pass through the narrow-band optical filter rotating disc, so that the optical filter of the device can realize isolation of laser receiving and transmitting.
The invention provides a wavelength self-adaptive matching terminal applied to multi-wavelength free matching laser communication, and the laser emission device adopts an optical switch to switch the wavelength, so that the volume, the weight and the like of a switching structure can be reduced, the switching speed is high, the reliability is realized, no mechanical structure participates in the process, and the laser emission efficiency and the consistency of an optical axis after the switching are guaranteed.
According to the invention, the terminal based on the terminal composition is applied to a multi-wavelength free matching laser communication system, the terminal receiving the signals can automatically identify the wavelength of the received laser signals and adjust the terminal to emit the laser signals with the corresponding wavelength, the process can realize autonomous working without personnel participation, the installation can be used for communication, and the problem of low working efficiency when the two existing terminals are used for communication is effectively solved.
The invention provides a wavelength self-adaptive matching terminal applied to multi-wavelength free matching laser communication, and the number of laser transmitters and narrow-band filters of the terminal is not increased by a hardware structure and the complexity of a system.
The method is suitable for the technical field of space laser communication and solves the technical problem of multi-wavelength receiving free matching in space laser communication free networking.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a system applied to multi-wavelength free-matching laser communication according to an embodiment.
Fig. 2 is a terminal composition diagram according to a third embodiment; 1 is a multi-wavelength transmitting module, 2 is a multi-wavelength receiving module, 3 is a first laser for transmitting, 4 is a second laser for transmitting, 5 is an optical switch, 6 is a transmitting lens, 7 is a receiving lens, 8 is a narrow-band filter rotating disc, and 11 is a receiving detector.
Fig. 3 is a diagram showing a structure of a rotary disk of a narrowband filter according to a sixth embodiment, and fig. 9 is a narrowband filter.
Detailed Description
Various embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The embodiments described by referring to the drawings are exemplary and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In a first embodiment, a wavelength adaptive matching terminal applied to multi-wavelength free matching laser communication, where the terminal includes a multi-wavelength transmitting module 1 and a multi-wavelength receiving module 2, where the multi-wavelength transmitting module 1 is capable of transmitting laser signals with at least two wavelengths, the multi-wavelength receiving module 2 is capable of receiving laser signals with at least two wavelengths, and the multi-wavelength receiving module 2 is capable of receiving laser signals with any one wavelength transmitted by the multi-wavelength transmitting module 1, and the multi-wavelength receiving module 2 is capable of acquiring wavelength data of the received laser signals and transmitting the wavelength data to the multi-wavelength transmitting module 1, and the multi-wavelength transmitting module 1 is capable of transmitting laser signals with corresponding wavelengths according to the received wavelength data.
In this embodiment, as shown in fig. 1, the adaptive matching terminal is composed of a multi-wavelength transmitting module 1 and a multi-wavelength receiving module 2, the multi-wavelength receiving module 2 can receive any wavelength laser signal transmitted by the multi-wavelength transmitting module 1, the multi-wavelength receiving module 2 can obtain wavelength data of the received laser signal according to the received laser signal, and send the wavelength data to the multi-wavelength transmitting module 1, and the multi-wavelength transmitting module 1 can transmit a laser signal with a corresponding wavelength according to the received wavelength data, so as to realize adaptive adjustment of the wavelength of the transmitted laser signal according to the wavelength of the received laser signal.
In the second embodiment, the present embodiment is further defined by a wavelength adaptive matching terminal applied to multi-wavelength free matching laser communication according to the first embodiment, where the multi-wavelength transmitting module 1 includes a multi-wavelength laser signal transmitting part and an optical switch 5, the multi-wavelength laser signal transmitting part is capable of transmitting laser signals of at least two wavelengths, the multi-wavelength laser signal transmitting part transmits the laser signals to the optical switch 5, and the optical switch 5 is configured to select input laser signals of corresponding wavelengths according to received wavelength data to transmit and output.
In this embodiment, the multi-wavelength laser signal emitting component of the multi-wavelength emitting module 1 can emit laser signals with at least two wavelengths, and then the wavelength of the emitted laser signals is selected by the optical switch 5, and the terminal adopts the optical switch 5 to reduce the volume, the weight and the like of the switching structure, so that the switching speed is fast and reliable, and no mechanical structure participates in ensuring the uniformity of the laser emitting efficiency and the optical axis after switching.
In a third embodiment, the present embodiment is further defined by a wavelength adaptive matching terminal applied to multi-wavelength free matching laser communication in the first embodiment, where the multi-wavelength laser signal emitting component includes at least two laser emitters, each for emitting a laser signal with one wavelength.
The multi-wavelength laser signal transmitting unit in this embodiment is implemented by using a plurality of laser transmitters, as shown in fig. 2, and includes 3 and 4 of two laser transmitters, where the two laser transmitters 3 and 4 are respectively used to transmit laser signals in different wavebands, the transmitted laser signals are selected by the optical switch 5 and then output a laser signal with one wavelength, and the laser signal is output by the transmitting lens 6, so as to implement adaptive communication adjustment of the laser signals with two wavelengths.
In the fourth embodiment, the present embodiment is further defined by a wavelength adaptive matching terminal applied to multi-wavelength free matching laser communication according to the first embodiment, where the multi-wavelength receiving module 2 includes a receiving lens 7, a filtering rotation structure and a receiving detector 11, the filtering rotation structure can rotationally filter laser signals with different wavelengths, the laser signals received by the receiving lens 7 are transmitted to the filtering rotation structure, filtered by the filtering rotation structure and output to the receiving detector 11, and the receiving detector 11 outputs wavelength data to the multi-wavelength transmitting module 1.
In this embodiment, as shown in fig. 2, a filter rotation structure is mounted at the rear end of the receiving lens 7, and a receiving detector 11 is mounted at the rear end of the filter rotation structure.
When receiving a laser signal, the multi-wavelength receiving module 2 transmits the laser signal to the filtering rotating structure, the filtering rotating structure and the receiving detector 11 behind the filtering rotating structure are used for identifying the wavelength of the laser signal, specifically, the laser rotating structure can respectively transmit laser signals with different wavelengths in the rotating process, when rotating to the condition that the wavelength capable of transmitting is the same as the wavelength of the received laser signal, the laser signals are transmitted and received by the receiving detector 11, the wavelength of the received laser signal is further determined, and finally, the self-adaptive adjustment of the wavelength of the laser signal transmitted by the multi-wavelength transmitting module 1 is realized.
The first laser transmitter 3 and the second laser transmitter 4 at the transmitting end of the multi-wavelength receiving module 2 are designed to be different laser wavelengths, and the transmitting laser wavelengths can be adaptively selected. In the device, the multi-wavelength transmitting module 1 is used as a transmitting end to input a wave band of a laser signal to a receiving end of the multi-wavelength receiving module 2, a filtering rotating structure of the receiving end can be self-adapted and judge the laser signal of the wave band, and the transmitting end of the multi-wavelength receiving module 2 outputs the laser signal of another wave band matched with the laser signal of the wave band according to the judged wave band laser signal.
In a fifth embodiment, the present embodiment is further defined that the wavelength adaptive matching terminal applied to the multi-wavelength free matching laser communication according to the fourth embodiment, where the multi-wavelength receiving module 2 further includes a filter rotation structure control unit, the filter rotation structure control unit is configured to control the filter rotation structure 8 to rotate at a uniform speed, and is further configured to control the filter rotation structure to rotate to a position where the laser signal of the wavelength data can be transmitted and stop when the wavelength data is received, and the receiving detector 11 further transmits the wavelength data to the filter rotation structure control unit.
In a sixth embodiment, the present embodiment is further defined that the wavelength adaptive matching terminal used in multi-wavelength free matching laser communication in the fourth embodiment, where the optical filtering rotating structure includes a narrowband optical filter rotating disc and a plurality of narrowband optical filters 9, a plurality of through holes are uniformly distributed on the narrowband optical filter rotating disc along a circumference, the number of the through holes is at least 1 more than that of the narrowband optical filters 9, one narrowband optical filter 9 is embedded and fixed in each through hole, and the through hole without the narrowband optical filter 9 is a neutral position.
In practical application, the number of the through holes can be twice the number of the narrow-band optical filters 9, and then the narrow-band optical filters 9 are uniformly distributed and fixed in the through holes, namely: a through hole is left between two adjacent narrowband filters 9, for example: 4 through holes and 2 narrow-band optical filters 9 are designed, as shown in fig. 3, a through hole is reserved between the two narrow-band optical filters 9, and the through hole is a neutral position, so that direct transmission of laser signals is realized, and isolation of laser receiving and transmitting can be realized through the through hole between the two narrow-band optical filters 9. This structure is provided with two narrowband optical filters 9, can realize the discernment of the laser signal of two wavelengths, need not the effect that personnel participated in.
The optical filter is switched, the narrowband optical filter can automatically identify the wave band of the received communication laser signal, and then the wave band of the corresponding laser signal is matched according to the wave band of the received communication laser signal.
An embodiment seven is a multi-wavelength free matching laser communication system, where the communication system includes two terminals, namely a terminal a and a terminal B, and the terminals are any one of the wavelength self-adaptive matching terminals from embodiment one to six.
In this embodiment, after the terminal a transmits a laser signal with a certain wavelength, the receiving module of the terminal B automatically identifies the wavelength of the received laser signal, then adjusts the transmitting module of the terminal B to transmit the laser signal with a corresponding wavelength for feedback, and finally the receiving module of the terminal a receives and identifies the transmitting module of the terminal B to transmit the corresponding wavelength, thereby completing the adaptive adjustment of the laser signal of the communication system.
An eighth embodiment is a multi-wavelength free-matching communication method applied to a multi-wavelength free-matching laser communication system as described in the seventh embodiment, where the multi-wavelength free-matching communication method includes:
the optical filtering rotating structures in the terminal A and the terminal B are rotated to neutral positions, so that laser signals received by the receiving lens can be directly transmitted to an optical signal receiving end of the receiving detector;
the terminal A and the terminal B are initially aligned;
the terminal A selects a laser signal with one wavelength to emit and output through an optical change-over switch in the terminal A;
after receiving the laser signal, the terminal B controls the filter rotating structure in the terminal B to rotate, and controls the filter rotating structure to stop to a designated position according to the change of the optical signal received by the receiving detector, so that a filter which is in the filter rotating structure and is suitable for the wavelength of the received laser signal is positioned between the receiving lens and the receiving detector, and the filter selection of the terminal B is completed;
the terminal B controls a switching switch in the terminal B to select the laser signal with the corresponding wavelength to transmit according to the wavelength of the received laser signal;
after receiving the laser signal, the terminal A controls the rotation of an internal optical filtering rotating structure, and controls the optical filtering rotating structure to stop to a designated position according to the change of the optical signal received by the receiving detector, so that an optical filter in the optical filtering rotating structure, which is suitable for the wavelength of the received laser signal, is positioned between a receiving lens and the receiving detector, and the optical filter selection of the terminal A is completed; and the establishment of the communication links of the terminal A and the terminal B is realized.
In the embodiment, the optical filter is adopted for switching, the received communication laser wavelength is identified, and then the communication transmitting laser wavelength matched with the received communication laser wavelength is adopted for switching through the optical switch according to a preset wavelength matching scheme, so that the autonomous matching of the communication receiving and transmitting wavelengths of two terminals is automatically realized. In a communication network system, two narrowband filters are arranged at two terminal receiving ends, and each narrowband filter only allows laser of one wave band to pass through for laser of different wave bands, so that different narrowband filters need to be selected when receiving laser of different wave bands.
The number of laser transmitters and narrow band filters does not add additional hardware, and the excessive devices not only add complexity to the system, but also increase the volume.
In a ninth embodiment, the method for performing initial alignment between the terminal a and the terminal B is further defined as one of the multiple wavelength free matching communication methods applied to the multiple wavelength free matching laser communication system in the eighth embodiment, and the method for performing initial alignment between the terminal a and the terminal B is as follows: and adjusting the receiving lens of the terminal A so that a receiving detector in the terminal A can receive the laser signal sent by the terminal B, and then adjusting the receiving lens of the terminal B so that the terminal B can receive the laser signal sent by the terminal A, thereby completing initial alignment.
In a tenth embodiment, the present embodiment is a further limitation of the multi-wavelength free matching communication method applied to the multi-wavelength free matching laser communication system according to the eighth embodiment, wherein the method for controlling the optical filtering rotation structure to stop to the designated position according to the change of the optical signal received by the receiving detector includes:
before the filter rotating structure rotates, the receiving detector can receive a laser signal;
and after the optical filtering rotating structure rotates, detecting the laser signal received by the receiving detector in real time, and controlling the optical filtering rotating structure to stop rotating when the optical filtering rotating structure receives the laser signal again.
An eleventh embodiment, based on a wavelength adaptive matching method applied to multi-wavelength free matching laser communication in the present invention, provides a practical embodiment in combination with a specific object: the wavelength self-adaptive matching method applied to multi-wavelength free matching laser communication is characterized in that 1550nm wave band is selected as communication laser, the wavelength is designed to be 1530nm and 1550nm two communicable wavelengths, free matching communication between any two terminals can be realized through wavelength switching, and laser communication among a plurality of nodes is facilitated; the wavelength of the first laser emitter 3 at the emitting end of the terminal a is designed to 1530nm, the wavelength of the second laser emitter 4 at the emitting end of the terminal B is designed to 1550nm, the cut-off frequency of the narrowband filter 9 of the terminal a is 1530±5nm, and the cut-off frequency of the narrowband filter 9 of the terminal B is 1550±5nm.
A wavelength self-adaptive matching method applied to multi-wavelength free matching laser communication comprises the following steps:
step S1: rotating the narrowband optical filter rotating disc 8 of the terminal A and the narrowband optical filter rotating disc 8 of the terminal B to neutral gear, so as to ensure that the laser received by the receiving lens 7 of the first terminal 1 can be directly irradiated onto the receiving detector 11, and the laser received by the receiving lens 7 of the terminal B can be directly irradiated onto the receiving detector 11;
step S2: after the terminal A and the terminal B finish initial alignment, the terminal A turns on the first laser emitter 3 to emit laser with the wavelength of 1530nm, and the terminal A switches the optical switch 5 to emit the laser with the wavelength of 1530nm by the emission lens 6;
step S3: after the receiving detector 11 of the terminal B receives the laser, rotating the narrow-band filter rotating disc 8 to switch the narrow-band filter, and simultaneously monitoring the change of the receiving signal of the receiving detector 11;
step S4: when the terminal B is switched to the narrow-band optical filter 9, the receiving detector 11 still can receive the laser signal, the rotation of the narrow-band optical filter rotating disc 8 is stopped, and the terminal B judges that the wavelength of the laser emitted by the terminal A is 1530nm;
step S5: the terminal B turns on a first laser emitter 3 matched with the wavelength of laser emitted by the terminal A, and switches the light to switch on the light 5, so that the laser with the wavelength of 1550nm of the first laser emitter 3 is emitted through a transmitting lens 6;
step S6: after the receiving lens 7 of the terminal A receives the laser emitted by the terminal B, the laser passes through the neutral gear of the narrow-band filter rotating disc 8 of the terminal A and is received by the receiving detector 11;
step S7: the terminal A rotates the narrowband filter rotating disc 8 to switch the narrowband filter, meanwhile, the receiving detector 11 is monitored to receive signal change, after the narrowband filter 9 is switched, the receiving detector 11 can still receive signals, and then the two terminals complete the matching between the emitted laser and the receiving narrowband filter, so that the link establishment is realized.
Through the steps, the communication wavelengths of the two laser communication terminals do not need to be set in advance, free self-adaptive matching can be realized when a laser communication optical link is established, and high-isolation full-duplex laser communication of any two terminals is realized.
In this embodiment, the receiving end of the terminal B inputs the one-band laser signal output by the transmitting end of the terminal a, the receiving lens 7 of the receiving end of the terminal B transmits the input one-band laser signal to the input end of the filtering rotating structure, the input end of the filtering rotating structure can adapt and judge the wavelength of the one-band laser signal, and the information of the one-band laser signal is transmitted from the output end of the filtering rotating structure to the input end of the receiving detector 11, so that the receiving end of the terminal B receives the one-band laser signal output by the transmitting end of the terminal a.
The first laser transmitter 3 and the second laser transmitter 4 at the transmitting end of the terminal B are designed to have different laser wavelengths, and the transmitting laser wavelengths can be adaptively selected. In the device, the terminal A is used as the transmitting end to input the wave band of a laser signal to the receiving end of the terminal B, the filtering rotary structure of the receiving end can be self-adaptive and judge the laser signal of the wave band, and the transmitting end of the terminal B outputs the laser signal of another wave band matched with the laser signal of the wave band according to the judged laser signal of the wave band.
The transmitting end of the terminal B will output a laser signal of another band matched with the input laser signal of one band, and the laser signal of another band is directly output by the output end of the transmitting lens 6.
The receiving end of the terminal a inputs another band laser signal output by the transmitting end of the terminal B, and the laser signal of the other band is a laser signal matched with a band laser signal output by the transmitting end of the terminal a, that is, since the band laser signal output by the transmitting end of the terminal a and the band laser signal input by the receiving end of the terminal B are a band laser signal, the laser signal of the other band is a laser signal matched with a band laser signal input by the receiving end of the terminal B. After the input end of the receiving end of the terminal A is self-adaptive through the input end of the filtering rotating structure, the matched laser signals of the other wave band are sent to the input end of the receiving detector 11, so that the laser signals of the other wave band output by the transmitting end of the receiving end input terminal B of the terminal A are completed.
Claims (8)
1. The multi-wavelength free matching communication method applied to the multi-wavelength free matching laser communication system is realized by adopting a wavelength self-adaptive matching terminal applied to the multi-wavelength free matching laser communication, and is characterized in that the terminal comprises a multi-wavelength transmitting module (1) and a multi-wavelength receiving module (2), wherein the multi-wavelength transmitting module (1) can transmit laser signals with at least two wavelengths, the multi-wavelength receiving module (2) can receive the laser signals with at least two wavelengths, the multi-wavelength receiving module (2) can receive any one wavelength of the laser signals transmitted by the multi-wavelength transmitting module (1), the multi-wavelength receiving module (2) can acquire wavelength data of the received laser signals according to the received laser signals and transmit the wavelength data to the multi-wavelength transmitting module (1), and the multi-wavelength transmitting module (1) can transmit the laser signals with corresponding wavelengths according to the received wavelength data;
the multi-wavelength free matching communication method comprises the following steps:
the optical filtering rotating structures in the terminal A and the terminal B are rotated to neutral positions, so that laser signals received by the receiving lens can be directly transmitted to an optical signal receiving end of the receiving detector;
the terminal A and the terminal B are initially aligned;
the terminal A selects a laser signal with one wavelength to emit and output through an optical change-over switch in the terminal A;
after receiving the laser signal, the terminal B controls the filter rotating structure in the terminal B to rotate, and controls the filter rotating structure to stop to a designated position according to the change of the optical signal received by the receiving detector, so that a filter which is in the filter rotating structure and is suitable for the wavelength of the received laser signal is positioned between the receiving lens and the receiving detector, and the filter selection of the terminal B is completed;
the terminal B controls a switching switch in the terminal B to select the laser signal with the corresponding wavelength to transmit according to the wavelength of the received laser signal;
after receiving the laser signal, the terminal A controls the rotation of an internal optical filtering rotating structure, and controls the optical filtering rotating structure to stop to a designated position according to the change of the optical signal received by the receiving detector, so that an optical filter in the optical filtering rotating structure, which is suitable for the wavelength of the received laser signal, is positioned between a receiving lens and the receiving detector, and the optical filter selection of the terminal A is completed; and the establishment of the communication links of the terminal A and the terminal B is realized.
2. A multi-wavelength free-matching communication method applied to a multi-wavelength free-matching laser communication system according to claim 1, characterized in that the multi-wavelength transmitting module (1) comprises a multi-wavelength laser signal transmitting part capable of transmitting laser signals of at least two wavelengths and an optical switch (5), the multi-wavelength laser signal transmitting part transmitting laser signals to the optical switch (5), the optical switch (5) being for selecting input laser signal transmission output of corresponding wavelengths according to received wavelength data.
3. A multi-wavelength free-match communication method applied to a multi-wavelength free-match laser communication system as claimed in claim 2, wherein said multi-wavelength laser signal emitting means comprises at least two laser emitters, each for emitting a laser signal of one wavelength.
4. The multi-wavelength free matching communication method applied to the multi-wavelength free matching laser communication system according to claim 1, wherein the multi-wavelength receiving module (2) comprises a receiving lens (7), a filtering rotating structure and a receiving detector (11), the filtering rotating structure can rotationally filter laser signals with different wavelengths, the laser signals received through the receiving lens (7) are transmitted to the filtering rotating structure, the laser signals are filtered by the filtering rotating structure and then are output to the receiving detector (11), and the receiving detector (11) outputs wavelength data to the multi-wavelength transmitting module (1).
5. A multi-wavelength free-matching communication method applied to a multi-wavelength free-matching laser communication system according to claim 4, characterized in that the multi-wavelength receiving module (2) further comprises a filter rotating structure controlling means for controlling the filter rotating structure (8) to rotate at a constant speed, and for controlling the filter rotating structure to rotate to a position where a laser signal of the wavelength data can be transmitted and stop when the wavelength data is received, and the receiving detector (11) further transmits the wavelength data to the filter rotating structure controlling means.
6. The multi-wavelength free matching communication method applied to the multi-wavelength free matching laser communication system according to claim 4, wherein the optical filtering rotating structure comprises a narrow-band optical filter rotating disc and a plurality of narrow-band optical filters (9), a plurality of through holes are uniformly distributed on the narrow-band optical filter rotating disc along the circumference, the number of the through holes is 1 more than that of the narrow-band optical filters (9), one narrow-band optical filter (9) is embedded and fixed in each through hole, and the through holes without the narrow-band optical filters (9) are at neutral positions.
7. The multi-wavelength free matching communication method applied to the multi-wavelength free matching laser communication system according to claim 4, wherein the optical filtering rotating structure comprises a narrow-band optical filter rotating disc and a plurality of narrow-band optical filters (9), a plurality of through holes are uniformly distributed on the narrow-band optical filter rotating disc along the circumference, the number of the through holes is twice as large as that of the narrow-band optical filters (9), the plurality of narrow-band optical filters (9) are uniformly distributed and fixed in the through holes, and one through hole is reserved between two adjacent narrow-band optical filters (9) as a neutral position.
8. The method for multi-wavelength free-matching communication applied to a multi-wavelength free-matching laser communication system according to claim 1, wherein the method for initially aligning the terminal a and the terminal B is as follows: and adjusting the receiving lens of the terminal A so that a receiving detector in the terminal A can receive the laser signal sent by the terminal B, and then adjusting the receiving lens of the terminal B so that the terminal B can receive the laser signal sent by the terminal A, thereby completing initial alignment.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5699177A (en) * | 1993-04-23 | 1997-12-16 | Canon Kabushiki Kaisha | Communication method in network system for performing information transmission among terminal equipments using light beams of a plurality of wavelengths, terminal equipment used in the method and network system using the method |
| CN104813210A (en) * | 2014-10-14 | 2015-07-29 | 索尔思光电（成都）有限公司 | Optical transmitter and method for transmitting optical signal |
| CN106788758A (en) * | 2016-12-29 | 2017-05-31 | 中国电子科技集团公司第三十四研究所 | A kind of transceiver terminal and operation method of laser space communication networking |
| CN108768516A (en) * | 2018-07-02 | 2018-11-06 | 北京卫星信息工程研究所 | The laser space communication terminal of wavelength fast tunable |
| US10637572B1 (en) * | 2019-11-25 | 2020-04-28 | Bae Systems Information And Electronic Systems Integration Inc. | Full duplex laser communication terminal architecture with reconfigurable wavelengths |
| CN111970054A (en) * | 2020-09-14 | 2020-11-20 | 长春理工大学 | Visual field splicing type wide-area rapid capture laser communication terminal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130223846A1 (en) * | 2009-02-17 | 2013-08-29 | Trilumina Corporation | High speed free-space optical communications |
| GB201905725D0 (en) * | 2019-04-24 | 2019-06-05 | Microsoft Technology Licensing Llc | Wavelenght switchable laser |
-
2022
- 2022-03-29 CN CN202210315525.9A patent/CN114710207B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5699177A (en) * | 1993-04-23 | 1997-12-16 | Canon Kabushiki Kaisha | Communication method in network system for performing information transmission among terminal equipments using light beams of a plurality of wavelengths, terminal equipment used in the method and network system using the method |
| CN104813210A (en) * | 2014-10-14 | 2015-07-29 | 索尔思光电（成都）有限公司 | Optical transmitter and method for transmitting optical signal |
| CN106788758A (en) * | 2016-12-29 | 2017-05-31 | 中国电子科技集团公司第三十四研究所 | A kind of transceiver terminal and operation method of laser space communication networking |
| CN108768516A (en) * | 2018-07-02 | 2018-11-06 | 北京卫星信息工程研究所 | The laser space communication terminal of wavelength fast tunable |
| US10637572B1 (en) * | 2019-11-25 | 2020-04-28 | Bae Systems Information And Electronic Systems Integration Inc. | Full duplex laser communication terminal architecture with reconfigurable wavelengths |
| CN111970054A (en) * | 2020-09-14 | 2020-11-20 | 长春理工大学 | Visual field splicing type wide-area rapid capture laser communication terminal |
Non-Patent Citations (2)
| Title |
|---|
| 空间激光通信组网反射镜联动跟踪控制技术;王俊尧;《中国光学》;全文 * |
| 空间激光通信组网反射镜联动跟踪控制技术;王俊尧;宋延嵩;佟首峰;姜会林;董岩;董科研;常帅;;中国光学(03);全文 * |
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