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Spaceborne tunable multichannel Fabry-Perot frequency discrimination module

A multi-channel, Fab technology, used in radio wave measurement systems, instruments, etc., can solve problems such as frequency drift and dislocation of double-edge intersection points, reduce wind field inversion errors, avoid complex optical paths, and improve wind speed measurement accuracy. Effect

Active Publication Date: 2017-12-15
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a spaceborne tunable multi-channel Fabry-Perot frequency discrimination module, which solves the problem of the center frequency of the emitted laser and the transmission spectrum of the frequency discrimination module caused by the influence of the on-orbit environment. The problem of frequency drift and misalignment of double-edge crossing points, and the use of simple light-splitting design and monolithic Fabry-Perot etalon to improve the overall on-orbit reliability of the frequency discrimination module

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. first as figure 1 and figure 2 As shown, the space-borne tunable multi-channel Fabry-Perot frequency discrimination module includes: a fiber-coupled collimator for emission light 11, a first diffractive optical element 21, a fiber-coupled collimator for echo signal light 12, a first Two diffractive optical elements 22 , a Fabry-Perot etalon 30 , a detector set 40 , an etalon driver 50 , a first controller 61 and a second controller 62 .

[0036] Further, the Fabry-Perot etalon 30 includes two transmission frequency locking channels 301 and two echo signal frequency discrimination channels 302, wherein the four channels have equal light-passing areas and are symmetrical to each other, and are all distributed on the standar...

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Abstract

The invention discloses a spaceborne tunable multichannel Fabry-Perot frequency discrimination module, and is suitable for a spaceborne wind measurement laser radar system; the spaceborne tunable multichannel Fabry-Perot frequency discrimination module comprises an emission fiber coupling collimator (11), a first diffraction optical element (21), a Fabry-Perot etalon (30), a detector assembly (40), an etalon driver (50), a first controller (61), an echo signal light fiber coupling collimator (12), a second diffraction optical element (22), and a second controller (62). An emission laser center frequency and a frequency discrimination module transmission spectral line double-edge cross point frequency have drifting offset problems under an on-orbit environment; the spaceborne tunable multichannel Fabry-Perot frequency discrimination module can solve said problems, and employs a simple light splitting design and a single block monoblock type Fabry-Perot etalon, thus improving the frequency discrimination module integral on-orbit reliability.

Description

technical field [0001] The invention relates to the technical field of Doppler wind measuring laser radar, in particular to a space-borne tunable multi-channel Fabry-Perot frequency discrimination module. Background technique [0002] Doppler wind lidar emits laser into the air through the transmitting system, and the laser irradiates the aerosol and air molecules to scatter. Due to the movement of the atmospheric wind field, according to the Doppler effect, the backscattered laser signal is additionally generated relative to the irradiated laser signal. Doppler frequency shift, the magnitude of the frequency shift represents different wind speed information, using this relationship, the atmospheric wind speed information can be obtained by measuring the Doppler frequency shift of the backscattered light. At present, the detection mechanism of laser Doppler wind radar is divided into two detection mechanisms: direct detection and coherent detection. The direct detection mech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481
Inventor 高龙李梦龙沈振民陶宇亮邓德斌郑永超
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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