Laser linewidth measuring device

A measuring device and laser line width technology, which are applied to measuring devices, adopting optical devices, testing optical properties, etc., can solve the problems of large space occupation and inability to obtain accurate line width values ​​in real time, etc., achieving convenient operation, compact structure, Guaranteed practical effect

Active Publication Date: 2012-08-08
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this measurement method has the advantage of intuitive images, it has certain requirements for the light to be measured and the measurement environment, and takes up a relatively large space. Moreover, the experimental data needs to be processed and calculated, and the line width value cannot be accurately obtained in real time.

Method used

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  • Laser linewidth measuring device

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Embodiment Construction

[0018] Below, the laser line width measurement device of the present invention will be described in detail in conjunction with the accompanying drawings and embodiments:

[0019] Such as figure 1 As shown, a laser line width measurement device includes a plurality of optical fiber couplers 1, and the present invention sets four optical fiber couplers 1, and the optical fiber couplers 1 communicate with a multi-channel optical switch 2 through an optical fiber, and the laser light passing through the optical switch 2 The beam is irradiated vertically on the ground glass 3, the laser beam passing through the ground glass 3 enters the F-P etalon 4, and the laser beam passing through the F-P standard 4 successively passes through the lens 5 and the vertical slit 6 to directly irradiate the charge coupled device (CCD: charge coupled devices ) 7, the charge-coupled device 7 transforms the optical signal into an electrical signal and communicates with the PC 8.

[0020] Wherein: the...

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Abstract

The invention discloses a laser linewidth measuring device comprising a plurality of optical fiber couplers. The optical fiber couplers are connected with a multichannel optical switch through an optical fiber, a laser beam passing through the optical switch irradiates vertically on ground glass, the laser beam passing through the ground glass enters an F-P etalon, the laser beam passing through the F-P etalon irradiates directly on a CCD after passing through a lens and a vertical slit successively, the CCD transforms an optical signal into an electric signal and communicates the electric signal with a PC machine. The measuring device of the invention has compact structure and convenient operation, realizes the online, instant, precise and automatic measurement of laser linewidth parameters, is capable of measuring a linewidth of continuous laser and a linewidth of pulse laser, and measureing linewidths of multi-path different lasers quickly.

Description

technical field [0001] The invention belongs to a light width measuring instrument, in particular to a laser line width measuring device which uses an F-P etalon to measure the width of laser light. Background technique [0002] In the application field of laser technology, the line width of laser represents the monochromaticity of laser, which is one of the important parameters of laser. Especially in the application field of laser technology that requires good monochromaticity and precise controllable laser wavelength, such as dye lasers, solid-state tunable lasers, optical parametric oscillators, etc., it is essential to accurately measure the linewidth of the laser. The commonly used method of measuring laser line width is to use scanning interferometer, but this method has great limitations for pulsed laser measurement, especially for pulsed lasers with high repetition rate and narrow pulse width (less than 100ns). Due to the pulse jitter phenomenon and the existence o...

Claims

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Application Information

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IPC IPC(8): G01M11/02G01J11/00G01B11/02
Inventor 张元芫陈日升张志忠
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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