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A system and method for detecting self-coherence characteristics of lasers

A laser, laser technology, applied in the direction of testing optical performance, etc., can solve problems such as bandwidth effects, and achieve the effect of high accuracy and precision

Active Publication Date: 2015-10-21
SHENZHEN POWER SUPPLY BUREAU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the bandwidth of the laser is determined by the light-emitting tube of the laser, its driving circuit and signal amplification circuit will affect its bandwidth

Method used

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  • A system and method for detecting self-coherence characteristics of lasers
  • A system and method for detecting self-coherence characteristics of lasers
  • A system and method for detecting self-coherence characteristics of lasers

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] Such as figure 1 Shown is a structural diagram of an embodiment of a system for detecting the self-coherence characteristics of a laser provided by the present invention.

[0040] The system for detecting the self-coherence characteristics of lasers of the present invention includes a first coupler 2, a mirror 3, a first tunable optical fiber delay 4, a second tunable optical fiber delay 50, a second coupler 6, The receiver 7 and the signal analysis and detection device 8, wherein:

[0041] The first coupler 2 is configured to receive laser light from the laser 1, send the laser light to the mirror 3, and send the reflected laser light from the mirror 3;

[0042] The reflecting mirror 3 is used to receive the laser light from the first coupler 2 and reflect the laser light back to the first coupler 2 under the action of a vibration source, wherein the vibration source...

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Abstract

The invention discloses a system for detecting the self-coherent characteristic of a laser device. The system comprises a first coupler, a reflecting mirror, a first adjustable fiber delayer, a second adjustable fiber delayer, a second coupler, a receiver and a signal analyzing and detecting device. By adjusting delaying of the first adjustable fiber delayer and the second fiber delayer, the signal analyzing and detecting device receives interference electrical signals output by the receiver, and analyzes the electrical signals to obtain the maximum self-coherent length of the laser device according to the coherent effect of the coherent electrical signals. The invention correspondingly discloses a method for detecting the self-coherent characteristic of the laser device. By implementing the system and method for detecting the self-coherent characteristic of the laser device, the self-coherent characteristic of the laser device can be detected conveniently, and the accuracy and precision are high.

Description

Technical field [0001] The invention relates to a characteristic detection of a laser, in particular to a system and a method for detecting the self-coherence characteristic of the laser. Background technique [0002] Optical fiber sensing technology is widely used in transportation, construction, electric power, coal mine, petrochemical, dam and other industries. As the key equipment, narrow-band lasers are widely used in positioning temperature and vibration detection sensor systems. [0003] By formula [0004] [0005] among them Is the laser wavelength, Is the bandwidth, Is the speed of light, Is the laser frequency (unit Hz). [0006] It can be seen that the bandwidth of the narrow-band light source determines the maximum self-coherence length of the fiber laser, and the self-coherence length directly affects the detection accuracy and positioning accuracy of the positioning temperature and vibration sensors. [0007] Although the bandwidth of the laser is determined by the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
Inventor 段绍辉姚森敬刘小朋田杰周正仙仝芳轩
Owner SHENZHEN POWER SUPPLY BUREAU