Laser device frequency stability measuring system

A frequency stability and laser technology, applied in the laser field, can solve the problems of difficult measurement of laser frequency stability and inaccurate measurement results, and achieve the effect of improving accuracy and improving beat frequency efficiency.

Inactive Publication Date: 2014-08-13
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In view of this, the main purpose of the present invention is to provide a laser frequency stability measurement system to solve the problems of difficult measurement of laser frequency stability and inaccurate measurement results

Method used

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  • Laser device frequency stability measuring system
  • Laser device frequency stability measuring system
  • Laser device frequency stability measuring system

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Embodiment Construction

[0022] see figure 1 As shown, the present invention provides a measuring instrument for laser frequency stability, comprising:

[0023] A test laser interface 1, a first tunable laser 2 and a second tunable laser 3, the test laser interface 1 is connected to a test laser through a polarization maintaining optical fiber, and the test laser input interface 1 is an optical fiber The flange, the first tunable laser 2 and the second tunable laser 3 are single-frequency lasers with identical models and parameters, and their tuning range covers the center wavelength of the laser to be tested;

[0024] An optical coupler 4, the first input end of which is connected to the output end of the laser interface 1 to be tested through a polarization-maintaining fiber, the second input end is connected to a first adjustable laser 2 through a polarization-maintaining fiber, and the third input end is connected through a polarization-maintaining fiber The optical fiber is connected to a second...

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Abstract

A laser device frequency stability measuring system comprises a laser device interface to be measured, a first adjustable laser device, a second adjustable laser device, an optical coupler, an optical output interface, a photoelectric detector, a power divider, a microwave output port, a frequency counter and a signal output interface, wherein the laser device interface to be measured is connected with the laser device to be measured; the first input end of the optical coupler is connected with the output end of the laser device interface to be measured, the second input end of the optical coupler is connected with the first adjustable laser device, and the third input end of the optical coupler is connected with the second adjustable laser device; the input end of the optical output interface is connected with the second output end of the optical coupler; the input end of the photoelectric detector is connected with the first output end of the optical coupler; the output end of the power divider is connected with the output end of the photoelectric detector; the input end of the microwave output port is connected with he second output end of the power divider; the input end of the frequency counter is connected with the first output end of the power divider; the input end of the signal output interface is connected with the output end of the frequency counter, the output end of the signal output interface is connected with an information processing unit, and the information processing unit has the functions of data processing, computation, storage and the like.

Description

technical field [0001] The invention belongs to the technical field of lasers, and specifically relates to a measurement system for the frequency stability of lasers, which mainly utilizes the principle of beat frequency detection to accurately measure the frequency stability of lasers. Background technique [0002] Lasers have the advantages of available frequency bandwidth, large information capacity, good directivity, high power, and long transmission distance. Therefore, they are often used as light sources and are widely used in industry, agriculture, precision measurement and detection, communication and information processing, medical treatment, military affairs, etc. Various aspects. Among the performance indicators of lasers, frequency stability is a very important indicator, especially in laser measurement, using the interference principle to measure various physical quantities such as length, displacement, speed, etc., the frequency stability of the laser will dir...

Claims

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Application Information

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IPC IPC(8): G01M11/02
Inventor 刘建国王玮钰陈伟郭锦锦祝宁华
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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