CN117031500B - Light source system and method for long-distance all-fiber laser Doppler wind-finding radar - Google Patents
Light source system and method for long-distance all-fiber laser Doppler wind-finding radar Download PDFInfo
- Publication number
- CN117031500B CN117031500B CN202310534275.2A CN202310534275A CN117031500B CN 117031500 B CN117031500 B CN 117031500B CN 202310534275 A CN202310534275 A CN 202310534275A CN 117031500 B CN117031500 B CN 117031500B
- Authority
- CN
- China
- Prior art keywords
- light
- control signal
- module
- light source
- splitting
- 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.)
- Active
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 29
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 22
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 22
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 8
- 230000003321 amplification Effects 0.000 claims description 49
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 49
- 230000003287 optical effect Effects 0.000 claims description 42
- 238000012545 processing Methods 0.000 claims description 36
- 230000010287 polarization Effects 0.000 claims description 28
- 238000001914 filtration Methods 0.000 claims description 23
- 238000003672 processing method Methods 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 10
- 238000001228 spectrum Methods 0.000 claims description 4
- 230000011664 signaling Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 12
- 230000001427 coherent effect Effects 0.000 abstract description 7
- 239000013307 optical fiber Substances 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/4802—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a light source system and a method for a long-distance all-fiber laser Doppler wind-finding radar, wherein the light source system comprises: a seed light source device; the input end of the light splitting modulation module is connected with the output end of the seed light source device; the beam synthesis module is arranged at the output end of the beam splitting modulation module; the sampling mirror is arranged at the output end of the light beam synthesizing module; the second sound light modulator is arranged on the reflection light path of the sampling mirror; the input end of the photoelectric detector is connected with the output end of the second sound modulator; and the control module is respectively in communication connection with the photoelectric detector, the light splitting modulation module and the second sound light modulator. According to the embodiment of the invention, in the process of synthesizing a plurality of narrow linewidth fiber lasers, coherent constructive output of the plurality of lasers is realized by utilizing phase control, so that the output power of the narrow linewidth fiber lasers is improved, and the detection distance and the signal to noise ratio of the fiber laser Doppler wind-finding radar are improved.
Description
Technical Field
The invention relates to the technical field of fiber laser Doppler wind-finding radar, in particular to a light source system and a method for a long-distance all-fiber laser Doppler wind-finding radar.
Background
Fiber laser doppler radars generally use a narrow linewidth fiber laser with a linewidth of less than 10kHz as a light source, and irradiate scattering particles such as aerosol in the atmosphere to cause doppler shift of reflected light. By measuring the Doppler shift of the reflected light and using a method to reverse wind park information. The fiber laser Doppler wind-finding radar has important application in the fields of aviation safety, weather forecast, wind power, ocean science and the like. However, the power boost of a narrow linewidth laser used as a fiber laser doppler wind lidar is limited to a certain extent due to nonlinear effects such as stimulated brillouin scattering. And limited light source power can result in limited signal-to-noise ratio and detection range of doppler anemometry radar. Therefore, how to increase the power of the light source, so as to further increase the signal-to-noise ratio and the detection distance of the fiber laser doppler wind-finding radar is a problem to be solved.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein.
The embodiment of the invention provides a light source system and a method for a long-distance all-fiber laser Doppler wind-finding radar, which can realize coherent constructive output of a plurality of laser beams by utilizing phase control in the process of synthesizing the plurality of the laser beams with narrow line width, and improve the output power of the narrow line width fiber laser, thereby improving the detection distance and the signal-to-noise ratio of the fiber laser Doppler wind-finding radar.
In a first aspect, an embodiment of the present invention provides a light source system for a long-distance all-fiber laser doppler wind-finding radar, including:
the seed light source device is used for generating and outputting continuous narrow linewidth fiber laser;
the input end of the light splitting modulation module is connected with the output end of the seed light source device, and the light splitting modulation module is used for carrying out light modulation treatment, primary power amplification, light splitting, phase modulation treatment and secondary power amplification on the narrow-linewidth fiber laser to obtain and output a plurality of sub-lasers after the light splitting amplification;
the beam synthesis module is arranged at the output end of the beam splitting modulation module and is used for synthesizing the incident multiple sub-lasers into one laser beam;
the sampling mirror is arranged at the output end of the light beam synthesis module and is used for dividing incident synthesized laser into reflected light and transmitted light and outputting the reflected light and the transmitted light;
the second sound optical modulator is arranged on the reflected light path of the sampling mirror and is used for carrying out pulse filtering treatment on the received reflected light;
the input end of the photoelectric detector is connected with the output end of the second acoustic optical modulator and is used for outputting a feedback signal;
the control module is respectively in communication connection with the photoelectric detector, the light splitting modulation module and the second acoustic optical modulator, and is used for controlling the optical modulation processing and the phase modulation processing of the light splitting modulation module through a phase control signal and a first time sequence control signal and controlling the pulse filtering processing of the second acoustic optical modulator through a second time sequence control signal; and acquiring the feedback signal output by the photoelectric detector, and adjusting the phase control signal according to the feedback signal.
In some embodiments, the optical spectrum modulation module comprises: the seed light source device comprises a first acousto-optic modulator, a preamplifier, a beam splitter, a phase modulation unit and a main amplifier unit which are sequentially connected, wherein the input end of the first acousto-optic modulator is connected with the output end of the seed light source device.
In some embodiments, the beam combining module comprises:
the primary light beam synthesis unit is arranged in the light emitting direction of the output end of the light splitting modulation module, and is used for synthesizing the multiple sub-lasers output by the light splitting modulation module into two beams of lasers and outputting the two beams of lasers.
In some embodiments, the beam combining module further comprises:
the secondary light beam synthesis unit is arranged in the light emitting direction of the output end of the primary light beam synthesis unit, and is used for synthesizing the two laser beams synthesized by the primary light beam synthesis unit into one laser beam again and outputting the laser beams.
In some embodiments, the primary beam combining unit comprises:
the four first-stage half-wave plates are sequentially arranged from top to bottom and are respectively and correspondingly arranged in the light emitting direction of the light splitting modulation module, and the first-stage half-wave plates are used for changing the polarization state of incident sub-lasers;
the first-stage total reflection mirror, the two first-stage polarization beam combiners and the second-stage total reflection mirror are sequentially and correspondingly arranged in the light emitting directions of the four first-stage half wave plates.
In some embodiments, the secondary beam combining unit comprises:
the two second-stage half-wave plates are respectively and correspondingly arranged in the light emitting directions of the two first-stage polarization beam combiners, and are used for changing the polarization state of incident sub-lasers;
the second-stage total reflection mirror and the second-stage polarization beam combiner are sequentially and correspondingly arranged in the light emitting directions of the two second-stage half wave plates.
In some embodiments, the beam splitter is a 1 x 4 beam splitter.
In a second aspect, an embodiment of the present invention provides a light source processing method for a long-distance all-fiber laser doppler wind-finding radar, which is applied to a light source system, where the light source system includes: the device comprises a seed light source device, a beam splitting modulation module, a beam synthesis module, a sampling mirror, a second acoustic light modulator, a photoelectric detector and a control module, wherein the control module is respectively in communication connection with the photoelectric detector, the beam splitting modulation module and the second acoustic light modulator;
the light source processing method comprises the following steps:
generating and outputting continuous narrow linewidth fiber laser to the beam-splitting modulation module through a seed light source device;
the control module outputs a first time sequence control signal and a phase control signal to the light splitting modulation module and outputs a second time sequence control signal to the second sound modulator;
the continuous narrow linewidth fiber laser is subjected to light modulation treatment, primary power amplification, light beam splitting, phase modulation treatment and secondary power amplification through the light splitting modulation module, and a plurality of sub lasers after beam splitting and amplification are output; wherein the light modulation processing is performed according to the first timing control signal, and the phase modulation processing is performed according to the phase control signal;
synthesizing the incident multiple sub-lasers into one laser beam by the beam synthesis module, dividing the incident synthesized laser beam into reflected light and transmitted light by the sampling mirror, and outputting the reflected light and the transmitted light;
performing pulse filtering processing on the received reflected light according to the second time sequence control signal through the second acoustic optical modulator;
and collecting and outputting a feedback signal subjected to pulse filtering processing to the control module through the photoelectric detector, so that the control module adjusts the phase control signal according to the feedback signal.
In some embodiments, in one control period, in the case that the first timing control signal is a first control signal or a low level 0, the second timing control signal is correspondingly a low level 0; in the case that the first timing control signal is a second control signal, the second timing control signal is correspondingly high level 1; wherein the amplitude of the second control signal is greater than 0 and less than the amplitude of the first control signal.
In some embodiments, the optical spectrum modulation module further comprises: the first acousto-optic modulator, the preamplifier, the beam splitter, the phase modulation unit and the main amplifier unit are sequentially connected;
the light modulation treatment, primary power amplification, light beam splitting, phase modulation treatment and secondary power amplification are carried out on the continuous narrow linewidth fiber laser through the light splitting modulation module, and a plurality of sub lasers after beam splitting and amplification are output, and the light splitting and amplification device comprises:
controlling the first acousto-optic modulator to modulate the continuous narrow linewidth fiber laser into nanosecond pulse laser comprising a lower continuous optical substrate according to the first timing control signal;
sequentially carrying out primary power amplification and beam splitting treatment on the nanosecond pulse laser through the preamplifier and the beam splitter to split one beam of laser into a plurality of sub lasers;
according to the phase control signal, controlling the phase modulation unit to respectively perform phase modulation on the multiple beams of sub lasers to obtain multiple beams of sub lasers after phase modulation;
and carrying out secondary power amplification on the plurality of sub lasers subjected to phase modulation through the main amplifier unit to obtain and output the plurality of sub lasers subjected to beam splitting amplification.
The embodiment of the invention comprises the following steps: a light source system for a long-range all-fiber laser doppler wind lidar comprising: the device comprises a seed light source device, a beam splitting modulation module, a beam synthesis module, a sampling mirror, a second acoustic light modulator, a photoelectric detector and a control module, wherein the control module is respectively in communication connection with the photoelectric detector, the beam splitting modulation module and the second acoustic light modulator; when the light source system works, after continuous narrow-linewidth fiber laser is generated and output to the light splitting modulation module through the seed light source device, a first time sequence control signal and a phase control signal are output to the light splitting modulation module through the control module, and a second time sequence control signal is output to the second sound modulator; then, carrying out light modulation treatment, primary power amplification, light beam splitting, phase modulation treatment and secondary power amplification on the continuous narrow linewidth fiber laser through a light splitting modulation module, and outputting a plurality of sub lasers after beam splitting and amplification; wherein the light modulation processing is performed according to a first timing control signal, and the phase modulation processing is performed according to a phase control signal; then, a plurality of incident sub lasers are combined into a beam of laser through a beam combining module, the incident combined laser is divided into reflected light and transmitted light through a sampling mirror, and the reflected light and the transmitted light are output; then, pulse filtering processing is carried out on the received reflected light according to a second time sequence control signal through a second acoustic optical modulator; finally, collecting the laser signals subjected to pulse filtering treatment through a photoelectric detector, and performing photoelectric conversion on the laser signals to output feedback signals to a control module so that the control module adjusts phase control signals according to the feedback signals; therefore, in the process of synthesizing a plurality of narrow linewidth optical fiber lasers, the embodiment of the invention can realize coherent constructive output of the plurality of laser beams by utilizing phase control, and improves the output power of the narrow linewidth optical fiber lasers, thereby improving the detection distance and the signal to noise ratio of the optical fiber laser Doppler wind finding radar.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
FIG. 1 is a schematic diagram of a system architecture of a light source system for a long-range all-fiber laser Doppler wind-finding radar according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a light source system for a long-range all-fiber laser Doppler wind-finding radar according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a light source processing method for a long-distance all-fiber laser Doppler wind-finding radar according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a first timing control signal and a second timing control signal according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different from that in the flowchart. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Based on the above, the invention provides a light source system and a method for a long-distance all-fiber laser Doppler wind-finding radar, when the light source system works, after continuous narrow-linewidth fiber laser is generated and output to a beam-splitting modulation module through a seed light source device, a first time sequence control signal and a phase control signal are output to the beam-splitting modulation module through a control module, and a second time sequence control signal is output to a second sound modulator; then, carrying out light modulation treatment, primary power amplification, light beam splitting, phase modulation treatment and secondary power amplification on the continuous narrow linewidth fiber laser through a light splitting modulation module, and outputting a plurality of sub lasers after beam splitting and amplification; wherein the light modulation processing is performed according to a first timing control signal, and the phase modulation processing is performed according to a phase control signal; then, a plurality of incident sub lasers are combined into a beam of laser through a beam combining module, the incident combined laser is divided into reflected light and transmitted light through a sampling mirror, and the reflected light and the transmitted light are output; then, pulse filtering processing is carried out on the received reflected light according to a second time sequence control signal through a second acoustic optical modulator; finally, collecting the laser signals subjected to pulse filtering treatment through a photoelectric detector, and performing photoelectric conversion on the laser signals to output feedback signals to a control module so that the control module adjusts phase control signals according to the feedback signals; therefore, in the process of synthesizing a plurality of narrow linewidth optical fiber lasers, the embodiment of the invention can realize coherent constructive output of the plurality of laser beams by utilizing phase control, and improves the output power of the narrow linewidth optical fiber lasers, thereby improving the detection distance and the signal to noise ratio of the optical fiber laser Doppler wind finding radar.
Embodiments of the present invention will be further described below with reference to the accompanying drawings.
As shown in fig. 1, in a first aspect, an embodiment of the present invention provides a light source system 100 for a long-range all-fiber laser doppler wind lidar, including: seed light source 110, beam splitting modulation module 120, beam combining module 130, sampling mirror 140, second acoustic light modulator 150, photodetector 160, and control module 170.
Wherein the seed light source 110 is used for generating and outputting continuous narrow linewidth fiber laser.
The input end of the beam splitting modulation module 120 is connected with the output end of the seed light source 110, and the beam splitting modulation module 120 is used for carrying out light modulation treatment, primary power amplification, light beam splitting, phase modulation treatment and secondary power amplification on the narrow linewidth fiber laser to obtain and output a plurality of beams of split and amplified sub-laser.
The beam combining module 130 is disposed at the output end of the beam splitting module 120, and the beam combining module 130 is configured to combine the incident multiple sub-lasers into one laser beam.
The sampling mirror 140 is disposed at the output end of the beam combining module 130, and is used for dividing the incident combined laser light into reflected light and transmitted light and outputting the reflected light and the transmitted light.
The second optical modulator 150 is disposed on the reflected light path of the sampling mirror 140, and is configured to perform pulse filtering processing on the received reflected light.
The input end of the photodetector 160 is connected to the output end of the second acoustic optical modulator 150, and is used for outputting a feedback signal.
The control module 170 is respectively in communication connection with the photodetector 160, the spectral modulation module 120 and the second acoustic optical modulator 150, and the control module 170 is used for controlling the optical modulation processing and the phase modulation processing of the spectral modulation module 120 through a phase control signal and a first time sequence control signal, and controlling the pulse filtering processing of the second acoustic optical modulator 150 through a second time sequence control signal; and acquiring a feedback signal output by the photoelectric detector, and adjusting a phase control signal according to the feedback signal.
The sampling mirror 140 has a spectral ratio and has both projection and reflection functions. The sampling mirror 140 divides the laser light into a small part of reflected light and a great part of transmitted light based on a splitting ratio, wherein the transmitted light is directly output into the air as final output laser light for realizing wind field measurement; the reflected light is incident on the second acoustic optical modulator 150, which is the basis for the subsequent generation of the feedback signal.
Specifically, the ratio of the light splitting may be 1/99, 0.1/99.9, etc., which is not particularly limited in the present invention, and the sampling mirror 140 with different ratios of light splitting may be used according to actual requirements.
It should be noted that, the second acoustic optical modulator 150 is configured to perform a pulse filtering process on the reflected light generated by the light splitting of the sampling mirror 140, where the pulse filtering process refers to: the pulse portion of the laser signal reflected by the sampling mirror 140 is chopped off, leaving a continuous laser substrate.
The photodetector 160 is used to collect the continuous laser substrate output from the second optical modulator 150, and then perform photoelectric conversion processing to convert the optical signal of the continuous laser substrate into an electrical signal and output the electrical signal to the control module 170.
According to the light source system 100 for the long-distance all-fiber laser Doppler wind-finding radar provided by the embodiment of the invention, when the light source system 100 works, after continuous narrow-linewidth fiber laser is generated and output to the beam-splitting modulation module 120 through the seed light source 110, a first time sequence control signal and a phase control signal are output to the beam-splitting modulation module 120 through the control module 170, and a second time sequence control signal is output to the second sound modulator 150; then, the continuous narrow linewidth fiber laser is subjected to light modulation treatment, primary power amplification, light beam splitting, phase modulation treatment and secondary power amplification by a light splitting modulation module 120, and a plurality of sub lasers after beam splitting and amplification are output; wherein the light modulation processing is performed according to a first timing control signal, and the phase modulation processing is performed according to a phase control signal; then, the incident multiple sub-lasers are combined into one laser beam by the beam combining module 130, the incident combined laser beam is separated into reflected light and transmitted light by the sampling mirror 140, and the reflected light and the transmitted light are output; then, pulse filtering processing is performed on the received reflected light according to the second timing control signal through the second acoustic optical modulator 150; finally, the laser signals after pulse filtering processing are collected through the photoelectric detector 160, and are subjected to photoelectric conversion to output feedback signals to the control module 170, so that the control module adjusts the phase control signals according to the feedback signals; therefore, in the process of synthesizing a plurality of narrow linewidth optical fiber lasers, the embodiment of the invention can realize coherent constructive output of the plurality of laser beams by utilizing phase control, and improves the output power of the narrow linewidth optical fiber lasers, thereby improving the detection distance and the signal to noise ratio of the optical fiber laser Doppler wind finding radar.
Referring to fig. 1 and 2, in some embodiments, the optical spectrum modulation module 120 includes: the first acousto-optic modulator 121, the pre-amplifier 122, the beam splitter 123, the phase modulation unit 124 and the main amplifier unit 125 are sequentially connected, wherein an input end of the first acousto-optic modulator 121 is connected with an output end of the seed light source 110.
Specifically, the input end of the first acousto-optic modulator 121 is connected to the output end of the seed light source 110, the output end of the first acousto-optic modulator 121 is connected to the input end of the pre-amplifier 122, the output end of the pre-amplifier 122 is connected to the input end of the beam splitter 123, the output end of the beam splitter 123 is connected to the input end of the phase modulation unit 124, and the output end of the phase modulation unit 124 is connected to the input end of the main amplifier unit 125.
The first acousto-optic modulator 121 is configured to modulate a continuous narrow linewidth fiber laser into a nanosecond pulse laser including a lower continuous light substrate; the pre-amplifier 122 is configured to pre-amplify (i.e. amplify primary power) the nanosecond pulse laser generated by modulation, so as to ensure that the split sub-laser power meets the input requirement of each main amplifier; and a beam splitter 123 for dividing the pre-amplified nanosecond pulse laser light into several sub-lasers. The main amplifier unit 125 is configured to power-amplify the sub-lasers divided into several beams, respectively.
The phase modulation unit 124 is used for phase modulating the divided sub-lasers. Specifically, the phase modulation device used in the phase modulation unit 124 may be a piezoelectric ceramic device, a crystal device, or the like, and the type of the phase modulator may be selected according to the device bandwidth requirement, which is not particularly limited by the present invention.
Referring to fig. 2, in some embodiments, beam splitter 123 is a 1 x 4 beam splitter. The 1 x 4 beam splitter has one input port and four output ports for splitting a laser beam into four sub-laser beams.
In some embodiments, the phase modulation unit 124 includes: four phase modulators, the output of which is correspondingly connected to the four outputs of the 1 x 4 beam splitter. Each of which is communicatively coupled to the control module 170.
In some embodiments, the main amplifier unit 125 includes: the input ends of the four main amplifiers are correspondingly connected with the output ends of the four phase modulators.
Referring to fig. 2, in some embodiments, the beam combining module 130 includes: a primary beam combining unit 131 and a secondary beam combining unit 132. The primary beam combining unit 131 is disposed at the output end of the beam splitting and modulating module 120 in the light emitting direction, and the primary beam combining unit 131 is configured to combine the multiple sub-lasers output by the beam splitting and modulating module 120 into two beams of lasers and output the two beams of lasers; the secondary beam combining unit 132 is disposed at the output end of the primary beam combining unit 131 in the light emitting direction, and the secondary beam combining unit 132 is configured to combine the two laser beams combined by the primary beam combining unit 131 into one laser beam again and output the combined laser beams.
In the embodiment of the invention, the primary beam synthesis unit 131 and the secondary beam synthesis unit 132 are used for carrying out twice beam synthesis, so that a plurality of sub lasers are synthesized into one laser.
In some embodiments, the primary beam combining unit 131 includes: the four first-stage half-wave plates 1311 are sequentially arranged from top to bottom and are respectively and correspondingly arranged in the light emitting direction of the light splitting and modulating module 120, and the first-stage half-wave plates 1311 are used for changing the polarization state of incident sub-lasers; the first primary total reflection mirror 1312, the two primary polarization beam combiners 1313, and the second primary total reflection mirror 1314 are disposed in the light-emitting direction of the four primary half-wave plates 1311, respectively, in order.
In some embodiments, the secondary beam combining unit 132 includes: two second-stage half-wave plates 1321, which are respectively disposed in the light emitting directions of the two first-stage polarization beam combiners 1313, and the second-stage half-wave plates 1321 are used for changing the polarization state of the incident sub-laser light; the second-stage total reflection mirror 1323 and the second-stage polarization beam combiner 1322 are disposed in the light-emitting directions of the two second-stage half-wave plates 1321, respectively.
It should be noted that, the half-wave plate is used for changing the polarization state of the input sub-laser light; a total reflection mirror for reflecting the sub-laser light to the polarization beam combiner; and the polarization beam combiner is used for combining the two sub lasers with perpendicular polarization states into one laser beam.
As an example, the complete working principle of the light source system 100 is further described in connection with fig. 1 and 2.
A light source system 100 comprising: seed light source 110, beam splitting modulation module 120, beam combining module 130, sampling mirror 140, second acoustic light modulator 150, photodetector 160, and control module 170. The beam-splitting modulation module 120 comprises a first acousto-optic modulator 121, a pre-amplifier 122, a 1×4 beam splitter 123, four phase modulators and four main amplifiers which are sequentially connected; the beam combining module 130 includes: four primary half-wave plates 1311, two primary total reflectors, two primary polarization beam combiners 1313, two secondary half-wave plates 1321, a secondary total reflector 1323 and a secondary polarization beam combiners 1322; the control module 170 is in control connection with the four phase modulators, the first acousto-optic modulator 121 and the second acousto-optic modulator 150, respectively.
When the light source system 100 works, continuous narrow linewidth laser light generated and output by the seed laser is modulated into nanosecond pulse laser light by the first acousto-optic modulator 121, the nanosecond pulse laser light is divided into four sub-lasers by sequential power amplification of the pre-amplifier 122 and light splitting treatment of the 1×4 beam splitter 123, the four sub-lasers are respectively subjected to phase modulation and secondary power amplification by the corresponding phase modulator and the main amplifier, the four sub-lasers after phase modulation and amplification are output to a free space, and the four sub-lasers are respectively subjected to polarization state adjustment by the first half-wave plate 1311 in respective light paths and then are divided into two groups of light. One of the two sub lasers in each group is totally reflected to the primary polarization beam combiner 1313 by the primary total reflection mirror at a certain angle, the other one is directly incident to the same primary polarization beam combiner 1313, and then the primary polarization beam combiner 1313 combines the two incident sub lasers with mutually perpendicular polarization states into one beam of light; the two beams obtained after the two groups of light are combined are subjected to polarization state adjustment through a second half-wave plate 1321, and similarly, four sub-lasers are finally combined into one laser output through a second total reflection mirror 1323 and a second polarization beam combiner 1322. The synthesized laser is subjected to light splitting and sampling through a sampling lens to obtain a small part of reflected light and a large part of transmitted light, and the transmitted light is transmitted into the air as final output laser to realize wind field measurement; the reflected light is filtered out of the pulse portion by the pulse filtering process of the second acoustic optical modulator 150, and a continuous laser substrate is reserved; and then collected by the photodetector 160, and subjected to photoelectric conversion to output a feedback signal to the control module 170. The control module 170 controls the first acoustic optical modulator 121, the second optical modulator, and the phase modulation unit 124.
It will be appreciated by persons skilled in the art that the system architecture shown in the figures is not limiting of the embodiments of the invention and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components.
The system embodiments described above are merely illustrative, in that the units illustrated as separate components may or may not be physically separate, i.e., may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
It will be understood by those skilled in the art that the system architecture and the application scenario described in the embodiments of the present invention are for more clearly describing the technical solution of the embodiments of the present invention, and are not limited to the technical solution provided in the embodiments of the present invention, and those skilled in the art can know that, with the evolution of the system architecture and the appearance of the new application scenario, the technical solution provided in the embodiments of the present invention is equally applicable to similar technical problems.
Based on the above system structure, various embodiments of the light source processing method for a long-distance all-fiber laser doppler wind-finding radar of the present invention are presented below.
In a second aspect, referring to fig. 3, an embodiment of the present invention provides a light source processing method for a long-distance all-fiber laser doppler wind-finding radar, where the light source processing method may be applied to a light source system as shown in fig. 1 and 2, where the light source system includes: the device comprises a seed light source device, a beam splitting modulation module, a beam synthesis module, a sampling mirror, a second acoustic light modulator, a photoelectric detector and a control module, wherein the control module is respectively in communication connection with the photoelectric detector, the beam splitting modulation module and the second acoustic light modulator. The light source processing method includes, but is not limited to, steps S110 to S160.
Step S110: and generating and outputting continuous narrow linewidth fiber laser to the light splitting modulation module through the seed light source device.
Step S120: the control module outputs a first time sequence control signal and a phase control signal to the light splitting modulation module, and outputs a second time sequence control signal to the second acoustic modulator.
Step S130: carrying out light modulation treatment, primary power amplification, light beam splitting, phase modulation treatment and secondary power amplification on continuous narrow linewidth fiber laser through a light splitting modulation module, and outputting a plurality of sub-lasers after beam splitting and amplification; wherein the light modulation processing is performed according to the first timing control signal, and the phase modulation processing is performed according to the phase control signal.
Step S140: the incident multiple sub-lasers are combined into one laser beam through the beam combining module, the incident combined laser beam is divided into reflected light and transmitted light through the sampling mirror, and the reflected light and the transmitted light are output.
Step S150: and performing pulse filtering processing on the received reflected light according to the second time sequence control signal through the second acoustic optical modulator.
Step S160: the laser signals after pulse filtering processing are collected through the photoelectric detector, and are subjected to photoelectric conversion to output feedback signals to the control module, so that the control module adjusts the phase control signals according to the feedback signals.
In the embodiment of the invention, through the steps S110 to S160, when the light source system works, after continuous narrow-linewidth fiber laser is generated and output to the beam-splitting modulation module through the seed light source device, a first time sequence control signal and a phase control signal are output to the beam-splitting modulation module through the control module, and a second time sequence control signal is output to the second sound modulator; then, carrying out light modulation treatment, primary power amplification, light beam splitting, phase modulation treatment and secondary power amplification on the continuous narrow linewidth fiber laser through a light splitting modulation module, and outputting a plurality of sub lasers after beam splitting and amplification; wherein the light modulation processing is performed according to a first timing control signal, and the phase modulation processing is performed according to a phase control signal; then, a plurality of incident sub lasers are combined into a beam of laser through a beam combining module, the incident combined laser is divided into reflected light and transmitted light through a sampling mirror, and the reflected light and the transmitted light are output; then, pulse filtering processing is carried out on the received reflected light according to a second time sequence control signal through a second acoustic optical modulator; finally, collecting the laser signals subjected to pulse filtering treatment through a photoelectric detector, and performing photoelectric conversion on the laser signals to output feedback signals to a control module so that the control module adjusts phase control signals according to the feedback signals; therefore, in the process of synthesizing a plurality of narrow linewidth optical fiber lasers, the embodiment of the invention can realize coherent constructive output of the plurality of laser beams by utilizing phase control, and improves the output power of the narrow linewidth optical fiber lasers, thereby improving the detection distance and the signal to noise ratio of the optical fiber laser Doppler wind finding radar.
It will be appreciated that the control module is preloaded with a phase compensation algorithm which on the one hand has system phase noise compensation capability and on the other hand enables control of the first and second acousto-optic modulators according to timing requirements. The phase compensation algorithm may include, but is not limited to, a random parallel gradient descent algorithm, a dithering method, and other known laser phase control methods. The invention is not limited to a specifically adopted phase compensation algorithm.
Referring to fig. 4, in some embodiments, in a control period, in a case where the first timing control signal is the first control signal or low level 0, the second timing control signal is correspondingly low level 0; in the case that the first timing control signal is the second control signal, the second timing control signal is correspondingly high level 1; the amplitude of the second control signal is larger than 0 and smaller than that of the first control signal.
Specifically, fig. 4 (a) is a schematic diagram showing a first timing control signal for controlling the first acousto-optic modulator, where the control module generates pulses with a certain pulse width (i.e. the first control signal) at a certain frequency and outputs the pulses to the first acousto-optic modulator, and after the pulses are ended, the control signal is turned off temporarily, so that the first acousto-optic modulator does not emit light, preventing interference to doppler frequency measurement, and the turn-off time is about 1 to several microseconds. And after the closing time is over and before the next pulse is generated, outputting a second control signal with lower amplitude to the first acousto-optic modulator to enable the first acousto-optic modulator to output a weaker continuous laser substrate for realizing detection of the phase difference of the multiple paths of sub-lasers relative to the piston.
Fig. 4 (b) is a schematic diagram showing a second timing control signal for controlling the second acoustic optical modulator, and the control mode of the second acoustic optical modulator is digital control. While the first acousto-optic modulator is generating a pulse control rising edge, the second acousto-optic modulator is controlled to output 0 until the closing time of the first acousto-optic modulator is finished, and the second acousto-optic modulator does not pass through laser in the period of time, so that pulse laser cannot pass through the second acousto-optic modulator to reach a photoelectric detector, and the pulse part in the laser, reflected by the sampling mirror 140, of which a small part is used for phase detection is chopped. During the rest of the time, the control of the second acoustic optical modulator is maintained at 1, so that the continuous laser substrate in the sampled laser can reach the photodetector through the second acoustic optical modulator and realize phase control as a feedback signal. During the second acoustic modulator off period, the control module does not execute the phase control algorithm so as not to generate additional phase noise.
In some embodiments, the optical splitting modulation module further comprises: the first acousto-optic modulator, the preamplifier, the beam splitter, the phase modulation unit and the main amplifier unit are sequentially connected; further describing step S130, step S130 includes, but is not limited to, the following steps:
firstly, according to a first timing control signal, controlling a first acousto-optic modulator to modulate continuous narrow linewidth optical fiber laser into nanosecond pulse laser containing a lower continuous optical substrate;
secondly, sequentially carrying out primary power amplification and beam splitting treatment on nanosecond pulse laser through a preamplifier and a beam splitter, and dividing one beam of laser into a plurality of sub lasers;
then, according to the phase control signal, controlling a phase modulation unit to respectively perform phase modulation on the multiple beams of sub-lasers to obtain the multiple beams of sub-lasers after the phase modulation;
and finally, carrying out secondary power amplification on the plurality of sub lasers subjected to phase modulation through a main amplifier unit to obtain and output a plurality of sub lasers subjected to beam splitting and amplification.
In summary, the embodiment of the invention has at least the following beneficial effects:
firstly, a stable, high-power light source system which can be used for a long-distance fiber laser Doppler wind-finding radar is provided.
Secondly, in the process of synthesizing a plurality of narrow linewidth optical fiber lasers, coherent constructive output of the plurality of laser beams is realized by utilizing phase control, so that the output power of the narrow linewidth optical fiber lasers is improved, and the detection distance and the signal to noise ratio of the optical fiber laser Doppler wind-finding radar are improved.
Thirdly, the problem that the narrow linewidth light source power of the fiber laser Doppler wind-finding radar is limited to be improved is solved, the detection power of the fiber laser Doppler wind-finding radar is improved, the measuring range and the signal-to-noise ratio are further improved, and the application of the fiber laser Doppler wind-finding radar is further widened. That is, the all-fiber laser Doppler wind-finding radar has good stability and expansibility.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present invention, and these equivalent modifications and substitutions are intended to be included in the scope of the present invention.
Claims (10)
1. A light source system for a remote all-fiber laser doppler wind-finding radar, comprising:
the seed light source device is used for generating and outputting continuous narrow linewidth fiber laser;
the input end of the light splitting modulation module is connected with the output end of the seed light source device, and the light splitting modulation module is used for carrying out light modulation treatment, primary power amplification, light splitting, phase modulation treatment and secondary power amplification on the narrow-linewidth fiber laser to obtain and output a plurality of sub-lasers after the light splitting amplification;
the beam synthesis module is arranged at the output end of the beam splitting modulation module and is used for synthesizing the incident multiple sub-lasers into one laser beam;
the sampling mirror is arranged at the output end of the light beam synthesis module and is used for dividing incident synthesized laser into reflected light and transmitted light and outputting the reflected light and the transmitted light;
the second sound optical modulator is arranged on the reflected light path of the sampling mirror and is used for carrying out pulse filtering treatment on the received reflected light;
the input end of the photoelectric detector is connected with the output end of the second acoustic optical modulator and is used for outputting a feedback signal;
the control module is respectively in communication connection with the photoelectric detector, the light splitting modulation module and the second acoustic optical modulator, and is used for controlling the optical modulation processing and the phase modulation processing of the light splitting modulation module through a phase control signal and a first time sequence control signal and controlling the pulse filtering processing of the second acoustic optical modulator through a second time sequence control signal; and acquiring the feedback signal output by the photoelectric detector, and adjusting the phase control signal according to the feedback signal.
2. The light source system of claim 1, wherein the optical splitting modulation module comprises: the seed light source device comprises a first acousto-optic modulator, a preamplifier, a beam splitter, a phase modulation unit and a main amplifier unit which are sequentially connected, wherein the input end of the first acousto-optic modulator is connected with the output end of the seed light source device.
3. The light source system of claim 2, wherein the beam combining module comprises:
the primary light beam synthesis unit is arranged in the light emitting direction of the output end of the light splitting modulation module, and is used for synthesizing the multiple sub-lasers output by the light splitting modulation module into two beams of lasers and outputting the two beams of lasers.
4. A light source system as recited in claim 3, wherein the beam combining module further comprises:
the secondary light beam synthesis unit is arranged in the light emitting direction of the output end of the primary light beam synthesis unit, and is used for synthesizing the two laser beams synthesized by the primary light beam synthesis unit into one laser beam again and outputting the laser beams.
5. The light source system according to claim 4, wherein the primary beam combining unit comprises:
the four first-stage half-wave plates are sequentially arranged from top to bottom and are respectively and correspondingly arranged in the light emitting direction of the light splitting modulation module, and the first-stage half-wave plates are used for changing the polarization state of incident sub-lasers;
the first-stage total reflection mirror, the two first-stage polarization beam combiners and the second-stage total reflection mirror are sequentially and correspondingly arranged in the light emitting directions of the four first-stage half wave plates.
6. The light source system according to claim 5, wherein the secondary beam combining unit includes:
the two second-stage half-wave plates are respectively and correspondingly arranged in the light emitting directions of the two first-stage polarization beam combiners, and are used for changing the polarization state of incident sub-lasers;
the second-stage total reflection mirror and the second-stage polarization beam combiner are sequentially and correspondingly arranged in the light emitting directions of the two second-stage half wave plates.
7. The light source system of claim 2, wherein the beam splitter is a 1 x 4 beam splitter.
8. A light source processing method for a long-distance all-fiber laser doppler wind-finding radar, which is characterized by being applied to a light source system, wherein the light source system comprises: the device comprises a seed light source device, a beam splitting modulation module, a beam synthesis module, a sampling mirror, a second acoustic light modulator, a photoelectric detector and a control module, wherein the control module is respectively in communication connection with the photoelectric detector, the beam splitting modulation module and the second acoustic light modulator;
the light source processing method comprises the following steps:
generating and outputting continuous narrow linewidth fiber laser to the beam-splitting modulation module through a seed light source device;
the control module outputs a first time sequence control signal and a phase control signal to the light splitting modulation module and outputs a second time sequence control signal to the second sound modulator;
the continuous narrow linewidth fiber laser is subjected to light modulation treatment, primary power amplification, light beam splitting, phase modulation treatment and secondary power amplification through the light splitting modulation module, and a plurality of sub lasers after beam splitting and amplification are output; wherein the light modulation processing is performed according to the first timing control signal, and the phase modulation processing is performed according to the phase control signal;
synthesizing the incident multiple sub-lasers into one laser beam by the beam synthesis module, dividing the incident synthesized laser beam into reflected light and transmitted light by the sampling mirror, and outputting the reflected light and the transmitted light;
performing pulse filtering processing on the received reflected light according to the second time sequence control signal through the second acoustic optical modulator;
and collecting and outputting a feedback signal subjected to pulse filtering processing to the control module through the photoelectric detector, so that the control module adjusts the phase control signal according to the feedback signal.
9. The light source processing method according to claim 8, wherein in a case where the first timing control signal is a first control signal or a low level 0 in one control period, the second timing control signal is correspondingly a low level 0; in the case that the first timing control signal is a second control signal, the second timing control signal is correspondingly high level 1; wherein the amplitude of the second control signal is greater than 0 and less than the amplitude of the first control signal.
10. The light source processing method according to claim 8, wherein the optical spectrum modulation module further comprises: the first acousto-optic modulator, the preamplifier, the beam splitter, the phase modulation unit and the main amplifier unit are sequentially connected;
the light modulation treatment, primary power amplification, light beam splitting, phase modulation treatment and secondary power amplification are carried out on the continuous narrow linewidth fiber laser through the light splitting modulation module, and a plurality of sub lasers after beam splitting and amplification are output, and the light splitting and amplification device comprises:
controlling the first acousto-optic modulator to modulate the continuous narrow linewidth fiber laser into nanosecond pulse laser comprising a lower continuous optical substrate according to the first timing control signal;
sequentially carrying out primary power amplification and beam splitting treatment on the nanosecond pulse laser through the preamplifier and the beam splitter to split one beam of laser into a plurality of sub lasers;
according to the phase control signal, controlling the phase modulation unit to respectively perform phase modulation on the multiple beams of sub lasers to obtain multiple beams of sub lasers after phase modulation;
and carrying out secondary power amplification on the plurality of sub lasers subjected to phase modulation through the main amplifier unit to obtain and output the plurality of sub lasers subjected to beam splitting amplification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310534275.2A CN117031500B (en) | 2023-05-11 | 2023-05-11 | Light source system and method for long-distance all-fiber laser Doppler wind-finding radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310534275.2A CN117031500B (en) | 2023-05-11 | 2023-05-11 | Light source system and method for long-distance all-fiber laser Doppler wind-finding radar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117031500A CN117031500A (en) | 2023-11-10 |
| CN117031500B true CN117031500B (en) | 2024-02-13 |
Family
ID=88625071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310534275.2A Active CN117031500B (en) | 2023-05-11 | 2023-05-11 | Light source system and method for long-distance all-fiber laser Doppler wind-finding radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117031500B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823221A (en) * | 2013-12-31 | 2014-05-28 | 西南技术物理研究所 | Pulse laser coherent wind measuring radar |
| CN105785395A (en) * | 2016-03-17 | 2016-07-20 | 四川知周科技有限责任公司 | Multi-wavelength-beam-combination coherent Doppler laser wind measurement radar |
| CN106940444A (en) * | 2017-02-27 | 2017-07-11 | 南京红露麟激光雷达科技有限公司 | Coherent Doppler wind-observation laser radar based on microwave differential gain |
| CN107390232A (en) * | 2017-06-26 | 2017-11-24 | 南京牧镭激光科技有限公司 | A kind of Doppler lidar wind detection method and device |
| WO2020056756A1 (en) * | 2018-09-21 | 2020-03-26 | 南京牧镭激光科技有限公司 | Pulse coherent doppler anemometry laser radar and anemometry method |
| WO2020199447A1 (en) * | 2019-03-29 | 2020-10-08 | 中国科学技术大学 | Broad-spectrum light source-based wind measurement lidar |
| CN113391327A (en) * | 2021-07-30 | 2021-09-14 | 重庆两江卫星移动通信有限公司 | Doppler wind finding radar system and method based on continuous laser |
| CN113406657A (en) * | 2021-06-18 | 2021-09-17 | 中国航空工业集团公司西安飞行自动控制研究所 | Laser Doppler velocity measurement device and measurement method |
| CN219799771U (en) * | 2023-05-11 | 2023-10-03 | 珠海光恒科技有限公司 | Light source system for long-distance all-fiber laser Doppler wind-finding radar |
-
2023
- 2023-05-11 CN CN202310534275.2A patent/CN117031500B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823221A (en) * | 2013-12-31 | 2014-05-28 | 西南技术物理研究所 | Pulse laser coherent wind measuring radar |
| CN105785395A (en) * | 2016-03-17 | 2016-07-20 | 四川知周科技有限责任公司 | Multi-wavelength-beam-combination coherent Doppler laser wind measurement radar |
| CN106940444A (en) * | 2017-02-27 | 2017-07-11 | 南京红露麟激光雷达科技有限公司 | Coherent Doppler wind-observation laser radar based on microwave differential gain |
| CN107390232A (en) * | 2017-06-26 | 2017-11-24 | 南京牧镭激光科技有限公司 | A kind of Doppler lidar wind detection method and device |
| WO2020056756A1 (en) * | 2018-09-21 | 2020-03-26 | 南京牧镭激光科技有限公司 | Pulse coherent doppler anemometry laser radar and anemometry method |
| WO2020199447A1 (en) * | 2019-03-29 | 2020-10-08 | 中国科学技术大学 | Broad-spectrum light source-based wind measurement lidar |
| CN113406657A (en) * | 2021-06-18 | 2021-09-17 | 中国航空工业集团公司西安飞行自动控制研究所 | Laser Doppler velocity measurement device and measurement method |
| CN113391327A (en) * | 2021-07-30 | 2021-09-14 | 重庆两江卫星移动通信有限公司 | Doppler wind finding radar system and method based on continuous laser |
| CN219799771U (en) * | 2023-05-11 | 2023-10-03 | 珠海光恒科技有限公司 | Light source system for long-distance all-fiber laser Doppler wind-finding radar |
Non-Patent Citations (1)
| Title |
|---|
| "用于风电场的1.55μm全光纤相干多普勒激光测风雷达的研究";谢宇;《中国优秀硕士论文全文数据库 工程科技Ⅱ辑》;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117031500A (en) | 2023-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6223644B1 (en) | Laser radar equipment | |
| CN112764050B (en) | Laser radar measurement method and laser radar system | |
| US20090051926A1 (en) | Multiple frequency optical mixer and demultiplexer and apparatus for remote sensing | |
| CN219799771U (en) | Light source system for long-distance all-fiber laser Doppler wind-finding radar | |
| JP2021515904A (en) | Pulse interference Doppler wind measurement Laser radar and wind measurement method | |
| EP2341643A1 (en) | Method and apparatus for filter locking | |
| CN112558106B (en) | Satellite-borne atmospheric ocean high repetition frequency laser radar system and detection method | |
| WO2023015589A1 (en) | Adaptive multi-channel wind measurement lidar system | |
| CN114460601A (en) | Laser radar system | |
| CN112099047A (en) | Sodium warm wind-Rayleigh laser radar system based on all-fiber acousto-optic modulation | |
| CN112327319B (en) | Solid-state laser radar detection method and system based on cyclic frequency shift ring | |
| CN210487989U (en) | Wind measurement laser radar system | |
| CN114895318A (en) | Laser radar system | |
| CN117031500B (en) | Light source system and method for long-distance all-fiber laser Doppler wind-finding radar | |
| CN111641100B (en) | Laser output control device, control method and laser wind-finding radar | |
| US20230273323A1 (en) | Laser radar device and wind measurement method | |
| Ai et al. | Pseudo-random single photon counting for space-borne atmospheric sensing applications | |
| CN115128589B (en) | Microwave photon MIMO radar detection method and system | |
| CN116908875A (en) | Remote high-parallelism-oriented laser imaging method and system | |
| CN111211480A (en) | Optical frequency comb signal generation device and method | |
| CN116106917A (en) | Parallel linear frequency modulation continuous wave laser radar ranging and speed measuring system | |
| CN110266392A (en) | Optical fiber hydrophone light emitting device based on multi-wavelength light pulse peak staggering amplification | |
| CN116047468A (en) | Multipath output signal transmitting device, MIMO chaotic laser radar and detection and identification equipment | |
| CN115084979A (en) | Laser light source device and laser radar | |
| CN114459593A (en) | Method for increasing detection distance of optical fiber vibration system |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |