An fp interference type spectral filter resonant frequency locking device and method

A technology of interference filter and spectral filter, which is applied in the field of FP interference spectral filter resonant frequency locking device, and can solve the problems of increasing the complexity of circuits and optical devices, complex equipment, etc.

Active Publication Date: 2016-08-17
ZHEJIANG UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology is widely used, the disadvantage is that the required equipment is very complicated
These increase the complexity of the technology's circuitry and optics

Method used

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  • An fp interference type spectral filter resonant frequency locking device and method
  • An fp interference type spectral filter resonant frequency locking device and method
  • An fp interference type spectral filter resonant frequency locking device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0081] figure 1 The middle laser 1 and the laser radar transmitter are shared by means of light splitting, and its frequency is the reference frequency that needs to be locked;

[0082] The above-mentioned collimating beam expander 2 can be an ordinary beam expander, such as the GCO-141602 beam expander of Beijing Daheng Company, which has a 6-fold beam expander;

[0083] Above-mentioned first beam splitter 3 adopts the beam splitter of T:R=10%:90%, as the GCC-411215 of Beijing Daheng Company; The second beam splitter 6, the third beam splitter 8 adopt common T:R=50% : 50% beam splitter, such as GCC-411102 of Beijing Daheng Company;

[0084] The above-mentioned first reflector 4, second reflector 5, and third reflector 7 can be ordinary reflectors, such as GCC-101102 of Beijing Daheng Company, with a diameter of 25.4mm;

[0085] The second lens 11 is a long focal length lens, such as GCL-010214 of Beijing Daheng Company, with a focal length of 400mm; the first lens 9 can be ...

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Abstract

The invention discloses a device and a method for locking resonant frequency of an FP (Fabry-Perot) interferometric spectrum filter. The device comprises a laser light splitting system, an FP interferometric filter system and a photoelectric detection system, wherein the laser light splitting system comprises a laser, a collimating beam expander, a first spectroscope, a first reflector, a second reflector, a second spectroscope and a third spectroscope; the FP interferometric filter system comprises an FP interferometric filter and a frequency tunning device; the photoelectric detection system comprises a third spectroscope, a first lens, a second lens, a first photomultiplier, a second photomultiplier, a third photomultiplier, a differential amplifier and an oscilloscope; the method specifically comprises the steps of 1, calculating the incident angles of two probe light beams, 2, adjusting the incident angles of the two probe light beams, and 3, checking the oscilloscope and determining the state of frequency locking. The device and the method are simple to realizes and capable of avoiding complex requirements of traditional frequency locking method for a circuit and an optical oath, and therefore, high system stability and robustness can be achieved.

Description

technical field [0001] The invention belongs to the technical field of laser radar, and in particular relates to a resonant frequency locking device and method of an FP (Fabry-Perot) interference type spectral filter. Background technique [0002] Due to the use of spectral filtering technology, high spectral resolution lidar solves the problem that traditional backscatter lidar needs many prior assumptions to invert atmospheric parameters, thus improving the accuracy of atmospheric remote sensing. In high spectral resolution lidar, the use of spectral filters is an extremely critical technology. Through the high spectral resolution capability of the spectral filter, the components scattered by atmospheric aerosols and components scattered by atmospheric molecules in the atmospheric backscattering spectrum can be separated, so that more details of the atmospheric backscattering spectrum can be obtained. Combined with relevant remote sensing principles, atmospheric optical p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/481G01N21/45
CPCG01S7/491G01S17/95
Inventor 刘东杨甬英成中涛
Owner ZHEJIANG UNIV
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