CN116360093A - Quick scanning capturing system and method suitable for long-distance wireless laser communication - Google Patents

Quick scanning capturing system and method suitable for long-distance wireless laser communication Download PDF

Info

Publication number
CN116360093A
CN116360093A CN202310229123.1A CN202310229123A CN116360093A CN 116360093 A CN116360093 A CN 116360093A CN 202310229123 A CN202310229123 A CN 202310229123A CN 116360093 A CN116360093 A CN 116360093A
Authority
CN
China
Prior art keywords
light
laser
beacon
beacon light
lens group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310229123.1A
Other languages
Chinese (zh)
Inventor
武文周
李少波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CETC 54 Research Institute
Original Assignee
CETC 54 Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CETC 54 Research Institute filed Critical CETC 54 Research Institute
Priority to CN202310229123.1A priority Critical patent/CN116360093A/en
Publication of CN116360093A publication Critical patent/CN116360093A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • 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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/505—Laser transmitters using external modulation
    • H04B10/5059—Laser transmitters using external modulation using a feed-forward signal generated by analysing the optical or electrical input
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

The invention discloses a rapid scanning and capturing system and method suitable for long-distance wireless laser communication, and belongs to the technical field of wireless laser communication. The system comprises a laser rapid scanning structure, a beacon light emitting structure, a beacon light detecting structure, a laser emitting and receiving lens structure, a beacon light signal beam combining lens group, a servo structure, a signal light emitting structure, a signal light receiving structure and a matched lens group structure. The invention adopts the rapid scanning structure to assist in realizing rapid capturing and alignment of the laser communication beam, and reduces the time consumption of the wireless laser communication system in the capturing and link establishment process of the laser link. The invention has low impurity degree, high automation degree, high response speed and easy realization.

Description

Quick scanning capturing system and method suitable for long-distance wireless laser communication
Technical Field
The invention relates to the technical field of wireless laser communication, in particular to a wireless laser communication optical antenna system with a rapid scanning and capturing chain-building mechanism and a rapid scanning and capturing method.
Background
Wireless laser communication optical antenna systems suitable for use in long-range communication scenarios employ narrow beams to propagate laser energy, where the beacon beam width used to maintain laser acquisition, tracking, and link maintenance is typically on the order of milliradians and sub-milliradians, depending on distance. The extremely narrow laser beam width is disadvantageous for the laser link to achieve fast link construction. In typical application scenarios such as space-based platform laser communication, the time for realizing laser link establishment is usually more than ten seconds, and the time proportion occupied by scanning capture is large. This limits the application of wireless laser communication technology in typical scenarios such as space-based.
Disclosure of Invention
In view of the foregoing, the present invention provides a fast scan acquisition system and method suitable for long-range wireless laser communication. The invention has the advantages of low impurity degree, high automation degree, high response speed and easy realization.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the rapid scanning and capturing system suitable for the long-distance wireless laser communication is characterized by comprising a laser rapid scanning structure, a beacon light emitting structure, a beacon light detecting structure, a laser emitting and receiving lens structure, a beacon light signal beam combining lens group, a servo structure, a signal light emitting structure, a signal light receiving structure and a matched lens group structure; wherein:
the beacon light emitting structure emits beacon light, the signal light emitting structure emits signal light, the beacon light and the signal light realize beacon light combination through the beacon light signal light combination lens group, the laser rapid scanning structure controls the beam directions of the beacon light and the signal light to realize rapid scanning and direction control, and the rapid control of the beam directions in the scanning space range is completed;
the beacon light from the incidence of free space passes through the laser transmitting and receiving lens structure, passes through the laser rapid scanning structure and the beacon light signal beam combining lens group, and enters the beacon light detection structure; the beacon light detection structure realizes the collection and the resolution of the position information of the light spots of the beacon light after realizing the light splitting, the light filtering and the beam converging treatment of the beacon light;
the laser transmitting and receiving lens structure realizes the spatial light path operations such as beam expansion, beam splitting, reflection and the like of the signal light and the beacon light, and realizes the transmitting and receiving treatment of the beacon light and the signal light;
the servo structure is a mechanical rotation and control structure for realizing the adjustment and stable control of the azimuth and pitching beam pointing rotation of the wireless optical communication rapid scanning and capturing system, and realizes the adjustment and maintenance of the beam pointing in a specific direction when the carrying platform is in a moving or static state;
after the signal light emitting structure emits, beam-shapes and expands beams through the signal light, the signal light and the beacon light keep a common optical axis state through the beacon light signal beam combining lens group, the beam direction is quickly adjusted through the beacon light quick scanning emitting structure, and then the signal light and the beacon light enter a free space through the laser emitting and receiving lens structure;
after the signal light receiving structure realizes signal light filtering and wave beam converging processing, signal light is coupled into a signal light receiving detection module, so that a signal light coupling detection receiving function is realized;
the matched lens group is used for realizing functional coupling and optical path design among all structures.
Further, the laser rapid scanning structure comprises a deflection control structure for adjusting the directions of receiving and transmitting light beams of the beacon light and the signal light, and adopts a galvanometer, a double-optical-wedge rotating structure or a combination of the above structures;
the beacon light emitting structure comprises a beam shaping, beam expanding, collimating lens group and a beacon light laser emitting module, wherein the beam shaping, beam expanding and collimating lens group adopts a transmission structure or a reflection structure or a transmission and reflection combined structure, and the beacon light laser emitting module adopts a semiconductor laser or the combination of the semiconductor laser and a laser power amplifier;
the beacon light detection structure comprises an optical lens group for beam-converging, collimation and filtering treatment, a beacon light detector and a beacon light spot information demodulation module, wherein the beacon light detector adopts a four-quadrant detector or an array detector or a CCD or CMOS detector;
the laser transmitting and receiving lens structure comprises a laser beam expander group and a shaping light path, wherein the laser beam expander group and the shaping light path adopt a transmission type structure or a reflection type structure or a transmission type and reflection type combined structure;
the beacon light signal beam combining lens group comprises a spectroscope group, a self-calibration lens group and a necessary matched lens group, the spectroscope can realize the receiving, transmitting, isolating and beam combining of received and emitted signal light and beacon light, the self-calibration lens group comprises a self-calibration light path, a self-calibration light detector and a self-calibration control module, and the self-calibration light detector adopts a four-quadrant detector or an array detector or a CCD or a CMOS detector;
the servo structure comprises a servo rotating structure, a servo motor and a servo control module, wherein the servo rotating structure is composed of two shafts, three shafts, other multi-shaft structures, an angle rotating servo structure or a combination of the two shafts, the three shafts, the other multi-shaft structures and the angle rotating servo structure, and the servo control module comprises an angle encoder, a servo control board card and necessary matched modules;
the signal light emitting structure comprises a beam shaping, beam expanding, collimating lens group and a signal light laser emitting module, wherein the beam shaping, beam expanding and collimating lens group adopts a transmission structure or a reflection structure or a transmission and reflection combined structure, and the signal light laser emitting module adopts a direct modulation laser or an external modulation laser;
the signal light receiving structure comprises an optical lens group for beam converging, collimation and filtering treatment and a signal light detection receiving module, wherein the signal light detection receiving module adopts a direct detector or a coherent receiving detection module;
the matched lens group structure comprises necessary reflecting mirrors or transmission mirrors among the optical lenses of the light paths of all the spaces.
Further, the device also comprises a beacon light emission light path, a beacon light receiving light path, a signal light emission light path and a signal light receiving light path; wherein:
the beacon light emission light path is transmitted from the beacon light emission structure to the beacon light signal beam combining lens group, then enters the laser rapid scanning structure, then enters the emission and receiving lens structure, then enters the free space, and the middle of the light path is required to pass through the necessary matched lens group structure;
the beacon light receiving optical path is transmitted from free space to the transmitting and receiving lens structure, then enters the laser rapid scanning structure, then enters the beacon light signal beam combining lens group, then enters the beacon light detection structure, and the middle of the optical path is required to pass through the necessary matched lens group structure;
the signal light emission light path is transmitted from the signal light emission structure to the beacon light signal beam combining lens group, then enters the laser rapid scanning structure, then enters the emission and receiving lens structure, then enters the free space, and the middle of the light path is required to pass through the necessary matched lens group structure;
the signal light receiving optical path is transmitted to the transmitting and receiving lens structure from the free space, then enters the laser rapid scanning structure, then enters the beacon light signal beam combining lens group, then enters the signal light receiving structure, and the optical path needs to pass through the necessary matched lens group structure.
A rapid scanning capture method suitable for long-distance wireless laser communication uses the rapid scanning capture system to perform rapid scanning capture of wireless laser communication, and comprises the following steps:
step 1, the servo structure adjusts the optical axis direction of a rapid scanning capturing system according to opposite end position direction information input by a platform, and initial alignment of a system beam is completed;
step 2, the laser rapid scanning structure controls the beacon light and the signal light beam of the common optical axis to rapidly scan in an uncertain region of the opposite-end communication target, and controls the beacon light with narrow beam width to rapidly scan and cover a region with a larger range;
step 3, the rapid scanning and capturing system of the opposite-end communication target receives the incident beacon light through a space light path, receives and identifies the beacon light pointing position information through the beacon light detection structure, and achieves mutual pointing coverage of the beacon light between two communication nodes;
and 4, the beacon light detection structure controls the laser rapid scanning structure to realize stable tracking of the beacon light by receiving the demodulated light spot pointing information, and realizes stable maintenance of the pointing direction of the optical axis of the signal light, so that the signal light receiving structure can stably receive the incident signal light and maintain laser communication.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the rapid scanning structure to assist in realizing rapid capturing and alignment of the laser communication beam, and can reduce the time consumption of a wireless laser communication system in the process of capturing and building a laser link.
2. The invention has low impurity degree, high automation degree, high response speed and easy realization.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
In the figure: the device comprises a 101 laser rapid scanning structure, a 102 beacon light emitting structure, a 103 beacon light detecting structure, a 104 laser emitting and receiving lens structure, a 105 beacon light signal light beam combining lens group, a 106 servo structure, a 107 signal light emitting structure, a 108 signal light receiving structure, a 109 matched lens group structure, a 201 bidirectional receiving and transmitting space light path and a 202 unidirectional space light path.
Description of the embodiments
The technical scheme of the invention is further described below with reference to the accompanying drawings and the specific embodiments.
The rapid scanning and capturing system suitable for the long-distance wireless laser communication is characterized by comprising a laser rapid scanning structure, a beacon light emitting structure, a beacon light detecting structure, a laser emitting and receiving lens structure, a beacon light signal beam combining lens group, a servo structure, a signal light emitting structure, a signal light receiving structure and a matched lens group structure.
The beacon light emitting structure emits beacon light, the signal light emitting structure emits signal light, the beacon light and the signal light realize beacon beam combination through the beacon light signal beam combination lens group, the laser rapid scanning structure controls the beam directions of the beacon light and the signal light to realize rapid scanning and directional control, and the rapid control of the beam directions in the scanning space range is completed.
The beacon light from free space enters the beacon light detection structure after passing through the laser transmitting and receiving lens structure, the laser fast scanning structure and the beacon light signal beam combining lens group. The beacon light detection structure realizes the collection and the resolution of the position information of the light spots of the beacon light after the light splitting, the filtering and the wave beam converging of the beacon light are realized.
The laser transmitting and receiving lens structure realizes the spatial light path operations such as beam expansion, beam splitting, reflection and the like of the signal light and the beacon light, and realizes the transmitting and receiving treatment of the beacon light and the signal light.
The servo structure is a mechanical rotation and control structure for realizing the adjustment and stable control of the azimuth and pitching beam pointing rotation of the wireless optical communication rapid scanning and capturing system, and realizes the adjustment and maintenance of the beam pointing in a specific direction when the carrying platform is in a moving or static state.
The signal light emitting structure is used for keeping the signal light and the beacon light in a common optical axis state after passing through the beacon light signal beam combining lens group after emitting, beam shaping and beam expanding the signal light, and the signal light and the beacon light enter the laser emitting and receiving lens structure together after being subjected to rapid adjustment treatment by the rapid scanning emitting structure of the beacon light, and then enter a free space.
After the signal light receiving structure realizes signal light filtering and wave beam converging processing, signal light is coupled into the signal light receiving detection module, so that the signal light coupling detection receiving function is realized.
The matched lens group is used for realizing functional coupling and optical path design among all structures.
Further, the laser rapid scanning structure comprises a deflection control structure for adjusting the directions of receiving and transmitting light beams of the beacon light and the signal light, and adopts a galvanometer, a double-optical-wedge rotating structure or a combination of the above structures;
the beacon light emitting structure comprises a beam shaping, beam expanding, collimating lens group and a beacon light laser emitting module, wherein the beam shaping, beam expanding and collimating lens group adopts a transmission structure or a reflection structure or a transmission and reflection combined structure, and the beacon light laser emitting module adopts a semiconductor laser or the combination of the semiconductor laser and a laser power amplifier;
the beacon light detection structure comprises an optical lens group for beam-converging, collimation and filtering treatment, a beacon light detector and a beacon light spot information demodulation module, wherein the beacon light detector adopts a four-quadrant detector or an array detector or a CCD or CMOS detector;
the laser transmitting and receiving lens structure comprises a laser beam expander group and a shaping light path, wherein the laser beam expander group and the shaping light path adopt a transmission type structure or a reflection type structure or a transmission type and reflection type combined structure;
the beacon light signal beam combining lens group comprises a spectroscope group, a self-calibration lens group and a necessary matched lens group, the spectroscope can realize the receiving, transmitting, isolating and beam combining of received and emitted signal light and beacon light, the self-calibration lens group comprises a self-calibration light path, a self-calibration light detector and a self-calibration control module, and the self-calibration light detector adopts a four-quadrant detector or an array detector or a CCD or a CMOS detector;
the servo structure comprises a servo rotating structure, a servo motor and a servo control module, wherein the servo rotating structure is composed of two shafts, three shafts, other multi-shaft structures, an angle rotating servo structure or a combination of the two shafts, the three shafts, the other multi-shaft structures and the angle rotating servo structure, and the servo control module comprises an angle encoder, a servo control board card and necessary matched modules;
the signal light emitting structure comprises a beam shaping, beam expanding, collimating lens group and a signal light laser emitting module, wherein the beam shaping, beam expanding and collimating lens group adopts a transmission structure or a reflection structure or a transmission and reflection combined structure, and the signal light laser emitting module adopts a direct modulation laser or an external modulation laser;
the signal light receiving structure comprises an optical lens group for beam converging, collimation and filtering treatment and a signal light detection receiving module, wherein the signal light detection receiving module adopts a direct detector or a coherent receiving detection module;
the matched lens group structure comprises necessary reflecting mirrors or transmission mirrors among the optical lenses of the light paths of all the spaces.
Further, the beacon light emitting light path, the beacon light receiving light path, the signal light emitting light path and the signal light receiving light path are as follows:
the beacon light emission light path is transmitted from the beacon light emission structure to the beacon light signal beam combining lens group, then enters the laser rapid scanning structure, then enters the emission and receiving lens structure, then enters the free space, and the middle of the light path is required to pass through the necessary matched lens group structure;
the beacon light receiving optical path is transmitted from free space to the transmitting and receiving lens structure, then enters the laser rapid scanning structure, then enters the beacon light signal beam combining lens group, then enters the beacon light detection structure, and the middle of the optical path is required to pass through the necessary matched lens group structure;
the signal light emission light path is transmitted from the signal light emission structure to the beacon light signal beam combining lens group, then enters the laser rapid scanning structure, then enters the emission and receiving lens structure, then enters the free space, and the middle of the light path is required to pass through the necessary matched lens group structure;
the signal light receiving optical path is transmitted to the transmitting and receiving lens structure from the free space, then enters the laser rapid scanning structure, then enters the beacon light signal beam combining lens group, then enters the signal light receiving structure, and the optical path needs to pass through the necessary matched lens group structure.
The following is a more specific example:
referring to fig. 1, a fast scanning capturing system 100 mainly includes a laser fast scanning structure 101, a beacon light emitting structure 102, a beacon light detecting structure 103, a laser emitting and receiving lens structure 104, a beacon light signal beam combining lens group 105, a servo structure 106, a signal light emitting structure 107, a signal light receiving structure 108, and a mating lens group structure 109. The spatial light signal transmission realizes a bidirectional receiving and transmitting spatial light path 201 and a unidirectional spatial light path 202 through the beacon light signal beam combiner set 105.
The beacon light emitting structure 102 emits beacon light, the signal light emitting structure 107 emits signal light, the beacon light and the signal light realize beacon light combination through the beacon light signal light combination beam combining lens group 105, the laser rapid scanning structure 101 controls the beam directions of the beacon light and the signal light, rapid scanning and direction control are realized, and rapid control of the beam directions in a scanning space range is completed.
The beacon light from the free space 300 enters the beacon light detection structure 103 after passing through the laser transmitting and receiving lens structure 104, the laser fast scanning structure 101 and the beacon light signal beam combining lens group 105. The beacon light detection structure realizes the collection and the resolution of the position information of the light spots of the beacon light after the light splitting, the filtering and the wave beam converging of the beacon light are realized.
The laser transmitting and receiving lens structure 104 realizes the spatial light path operations such as beam expansion, beam splitting, reflection and the like of the signal light and the beacon light, and realizes the transmitting and receiving processing of the beacon light and the signal light.
The servo structure 106 is a mechanical rotation and control structure for realizing the adjustment and stable control of the azimuth and pitching beam pointing rotation of the wireless optical communication rapid scanning and capturing system, and realizes the adjustment and maintenance of the beam pointing in a specific direction when the carrying platform is in a moving or static state.
The signal light emitting structure 107 keeps the signal light and the beacon light in a common optical axis state after passing through the beacon light signal beam combining lens group 105 after emitting and shaping the signal light beam, and enters the laser emitting and receiving lens structure 104 after passing through the beacon light fast scanning emitting structure 101 to realize fast adjustment of the light beam direction, and then enters the free space 300.
After the signal light receiving structure 108 realizes the signal light filtering and the beam converging processing, the signal light is coupled into the signal light receiving detection module to realize the signal light coupling detection receiving function.
The matched set of mirrors 109 is used to achieve functional coupling and optical path design between the structures.
The specific process of the rapid scanning and capturing system for realizing the rapid scanning and capturing of the wireless laser communication is as follows:
step 1, the servo structure adjusts the optical axis direction of a rapid scanning capturing system according to opposite end position direction information input by a platform, and initial alignment of a system beam is completed;
step 2, the laser rapid scanning structure controls the beacon light and the signal light beam of the common optical axis to rapidly scan in an uncertain region of the opposite-end communication target, and controls the beacon light with narrow beam width to rapidly scan and cover a region with a larger range;
step 3, the rapid scanning and capturing system of the opposite-end communication target receives the incident beacon light through a space light path, receives and identifies the beacon light pointing position information through the beacon light detection structure, and achieves mutual pointing coverage of the beacon light between two communication nodes;
and 4, the beacon light detection structure controls the laser rapid scanning structure to realize stable tracking of the beacon light by receiving the demodulated light spot pointing information, and realizes stable maintenance of the pointing direction of the optical axis of the signal light, so that the signal light receiving structure can stably receive the incident signal light and maintain laser communication.
In a word, the invention adopts the rapid scanning structure to assist in realizing rapid capturing and alignment of laser communication beams, and reduces the time consumption of a wireless laser communication system in the processes of capturing and building a laser link. The invention has low impurity degree, high automation degree, high response speed and easy realization.

Claims (4)

1. The rapid scanning and capturing system suitable for the long-distance wireless laser communication is characterized by comprising a laser rapid scanning structure, a beacon light emitting structure, a beacon light detecting structure, a laser emitting and receiving lens structure, a beacon light signal beam combining lens group, a servo structure, a signal light emitting structure, a signal light receiving structure and a matched lens group structure; wherein:
the beacon light emitting structure emits beacon light, the signal light emitting structure emits signal light, the beacon light and the signal light realize beacon light combination through the beacon light signal light combination lens group, the laser rapid scanning structure controls the beam directions of the beacon light and the signal light to realize rapid scanning and direction control, and the rapid control of the beam directions in the scanning space range is completed;
the beacon light from the incidence of free space passes through the laser transmitting and receiving lens structure, passes through the laser rapid scanning structure and the beacon light signal beam combining lens group, and enters the beacon light detection structure; the beacon light detection structure realizes the collection and the resolution of the position information of the light spots of the beacon light after realizing the light splitting, the light filtering and the beam converging treatment of the beacon light;
the laser transmitting and receiving lens structure realizes the spatial light path operations such as beam expansion, beam splitting, reflection and the like of the signal light and the beacon light, and realizes the transmitting and receiving treatment of the beacon light and the signal light;
the servo structure is a mechanical rotation and control structure for realizing the adjustment and stable control of the azimuth and pitching beam pointing rotation of the wireless optical communication rapid scanning and capturing system, and realizes the adjustment and maintenance of the beam pointing in a specific direction when the carrying platform is in a moving or static state;
after the signal light emitting structure emits, beam-shapes and expands beams through the signal light, the signal light and the beacon light keep a common optical axis state through the beacon light signal beam combining lens group, the beam direction is quickly adjusted through the beacon light quick scanning emitting structure, and then the signal light and the beacon light enter a free space through the laser emitting and receiving lens structure;
after the signal light receiving structure realizes signal light filtering and wave beam converging processing, signal light is coupled into a signal light receiving detection module, so that a signal light coupling detection receiving function is realized;
the matched lens group is used for realizing functional coupling and optical path design among all structures.
2. A fast scan acquisition system suitable for long range wireless laser communication according to claim 1,
the laser rapid scanning structure comprises a deflection control structure for adjusting the directions of received and emitted light beams of beacon light and signal light, and adopts a galvanometer, a double-optical-wedge rotating structure or a combination of the above structures;
the beacon light emitting structure comprises a beam shaping, beam expanding, collimating lens group and a beacon light laser emitting module, wherein the beam shaping, beam expanding and collimating lens group adopts a transmission structure or a reflection structure or a transmission and reflection combined structure, and the beacon light laser emitting module adopts a semiconductor laser or the combination of the semiconductor laser and a laser power amplifier;
the beacon light detection structure comprises an optical lens group for beam-converging, collimation and filtering treatment, a beacon light detector and a beacon light spot information demodulation module, wherein the beacon light detector adopts a four-quadrant detector or an array detector or a CCD or CMOS detector;
the laser transmitting and receiving lens structure comprises a laser beam expander group and a shaping light path, wherein the laser beam expander group and the shaping light path adopt a transmission type structure or a reflection type structure or a transmission type and reflection type combined structure;
the beacon light signal beam combining lens group comprises a spectroscope group, a self-calibration lens group and a necessary matched lens group, the spectroscope can realize the receiving, transmitting, isolating and beam combining of received and emitted signal light and beacon light, the self-calibration lens group comprises a self-calibration light path, a self-calibration light detector and a self-calibration control module, and the self-calibration light detector adopts a four-quadrant detector or an array detector or a CCD or a CMOS detector;
the servo structure comprises a servo rotating structure, a servo motor and a servo control module, wherein the servo rotating structure is composed of two shafts, three shafts, other multi-shaft structures, an angle rotating servo structure or a combination of the two shafts, the three shafts, the other multi-shaft structures and the angle rotating servo structure, and the servo control module comprises an angle encoder, a servo control board card and necessary matched modules;
the signal light emitting structure comprises a beam shaping, beam expanding, collimating lens group and a signal light laser emitting module, wherein the beam shaping, beam expanding and collimating lens group adopts a transmission structure or a reflection structure or a transmission and reflection combined structure, and the signal light laser emitting module adopts a direct modulation laser or an external modulation laser;
the signal light receiving structure comprises an optical lens group for beam converging, collimation and filtering treatment and a signal light detection receiving module, wherein the signal light detection receiving module adopts a direct detector or a coherent receiving detection module;
the matched lens group structure comprises necessary reflecting mirrors or transmission mirrors among the optical lenses of the light paths of all the spaces.
3. The rapid scan capture system of claim 2, further comprising a beacon light emission optical path, a beacon light reception optical path, a signal light emission optical path, a signal light reception optical path; wherein:
the beacon light emission light path is transmitted from the beacon light emission structure to the beacon light signal beam combining lens group, then enters the laser rapid scanning structure, then enters the emission and receiving lens structure, then enters the free space, and the middle of the light path is required to pass through the necessary matched lens group structure;
the beacon light receiving optical path is transmitted from free space to the transmitting and receiving lens structure, then enters the laser rapid scanning structure, then enters the beacon light signal beam combining lens group, then enters the beacon light detection structure, and the middle of the optical path is required to pass through the necessary matched lens group structure;
the signal light emission light path is transmitted from the signal light emission structure to the beacon light signal beam combining lens group, then enters the laser rapid scanning structure, then enters the emission and receiving lens structure, then enters the free space, and the middle of the light path is required to pass through the necessary matched lens group structure;
the signal light receiving optical path is transmitted to the transmitting and receiving lens structure from the free space, then enters the laser rapid scanning structure, then enters the beacon light signal beam combining lens group, then enters the signal light receiving structure, and the optical path needs to pass through the necessary matched lens group structure.
4. A fast scan acquisition method suitable for long-range wireless laser communication, characterized in that the fast scan acquisition of wireless laser communication is performed using the fast scan acquisition system according to any one of claims 1-3, comprising the steps of:
step 1, the servo structure adjusts the optical axis direction of a rapid scanning capturing system according to opposite end position direction information input by a platform, and initial alignment of a system beam is completed;
step 2, the laser rapid scanning structure controls the beacon light and the signal light beam of the common optical axis to rapidly scan in an uncertain region of the opposite-end communication target, and controls the beacon light with narrow beam width to rapidly scan and cover a region with a larger range;
step 3, the rapid scanning and capturing system of the opposite-end communication target receives the incident beacon light through a space light path, receives and identifies the beacon light pointing position information through the beacon light detection structure, and achieves mutual pointing coverage of the beacon light between two communication nodes;
and 4, the beacon light detection structure controls the laser rapid scanning structure to realize stable tracking of the beacon light by receiving the demodulated light spot pointing information, and realizes stable maintenance of the pointing direction of the optical axis of the signal light, so that the signal light receiving structure can stably receive the incident signal light and maintain laser communication.
CN202310229123.1A 2023-03-10 2023-03-10 Quick scanning capturing system and method suitable for long-distance wireless laser communication Pending CN116360093A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310229123.1A CN116360093A (en) 2023-03-10 2023-03-10 Quick scanning capturing system and method suitable for long-distance wireless laser communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310229123.1A CN116360093A (en) 2023-03-10 2023-03-10 Quick scanning capturing system and method suitable for long-distance wireless laser communication

Publications (1)

Publication Number Publication Date
CN116360093A true CN116360093A (en) 2023-06-30

Family

ID=86918049

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310229123.1A Pending CN116360093A (en) 2023-03-10 2023-03-10 Quick scanning capturing system and method suitable for long-distance wireless laser communication

Country Status (1)

Country Link
CN (1) CN116360093A (en)

Similar Documents

Publication Publication Date Title
US8160452B1 (en) Rapid acquisition, pointing and tracking optical system for free space optical communications
CN108574533B (en) Common-caliber laser communication optical transmitter and receiver based on optical phased array
EP2456099B1 (en) Capturing device, capturing method, and capturing program
CN114142927B (en) Beacon-free laser communication system with switchable light path and method
CN111010231B (en) Free space optical communication method and system
CN110233664B (en) Tracking and aiming control system and tracking and aiming control method for wireless optical communication
CN110739994B (en) Free space optical communication link establishing method
JP2022517505A (en) Two-mirror tracking system for free-space optical communication
CN104539372B (en) Long-distance laser atmosphere communication receiving device with fast alignment function and communication method
CN108923859B (en) Coherent tracking device and method based on electro-optic deflection
CN114200687B (en) Optical self-calibration device and method for laser communication system
US20060180739A1 (en) Beam steering for optical target identification and tracking without gimbals or scanning mirrors
CN113726428A (en) Large-view-field light and small-size laser communication optical transmitter and receiver suitable for light platform
CN112713935A (en) Free space optical communication scanning tracking method, system, device and medium
Jeganathan et al. Lessons learned from the Optical Communications Demonstrator (OCD)
CN114221702B (en) All-solid-state space laser communication terminal based on laser phased array
Wang et al. Acquisition in short-range free-space optical communication
US20040208597A1 (en) Free-Space optical transceiver link
CN216391014U (en) Beacon-free optical laser communication system
CN116360093A (en) Quick scanning capturing system and method suitable for long-distance wireless laser communication
CN115642957A (en) Laser communication optical transmitter and receiver suitable for unmanned aerial vehicle platform with limited loading capacity
CN113904721B (en) Microwave-assisted wireless optical link acquisition tracking alignment system and method
CN113237439B (en) Decoupling tracking method of periscopic laser communication terminal
CN112835065B (en) Intelligent cascading quantum imaging detection system
CN112769480B (en) Spatial laser-to-optical fiber coupling device with ultra-large field angle and application method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination