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Device for measuring optical absorption coefficient of large-caliber crystalline material

A technology of optical absorption coefficient and measuring device, applied in the direction of polarization influence characteristics, etc., can solve the problems of unsolved measurement of optical absorption coefficient, measurement of optical absorption coefficient of crystal materials, etc., and achieve high measurement repeatability and Reproducibility, simple operation, and accurate measurement results

Inactive Publication Date: 2014-07-02
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

However, it does not solve the problem of measuring the optical absorption coefficient of the o-axis or e-axis for a specific polarization state
[0005] No relevant reports on the measurement of the light absorption coefficient of crystal materials have been found

Method used

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  • Device for measuring optical absorption coefficient of large-caliber crystalline material
  • Device for measuring optical absorption coefficient of large-caliber crystalline material

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Embodiment Construction

[0021] Such as figure 1 As shown, the present invention is suitable for measuring the light absorption coefficient of large-diameter crystal materials, including 1. Tunable laser 1, laser power stabilization system 2, beam splitter 3, collimating CCD4, monitoring detector 5, polarizer 6 , large diameter crystal sample 7, large diameter crystal sample carrier 8, autocollimator 9, polarizer and electric control console 10, measuring detector 11, computer 12, electric console A 13, electric console B 14 . The measuring device suitable for the light absorption coefficient of large-diameter crystal materials is characterized in that: the beam emitted by the tunable laser 1 passes through the laser power stabilization system 2 to form a stable collimated laser beam, and the stable collimated laser beam passes through the beam splitter 3 The reflected light beam is received by the monitoring detector 5, the transmitted light beam is polarized by the polarizer 6 and irradiated on th...

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Abstract

The invention provides a device for measuring an optical absorption coefficient of a large-caliber crystalline material. According to the measurement device, stable collimated laser beams are formed by utilizing a tunable laser light source and a stable laser power system, the stable laser beams irradiate a measured large-caliber crystal, the perpendicularity between incident laser and the surface of the large-caliber crystal and the perpendicularity between the o-axis or e-axis of the large-caliber crystal and the table board are monitored by utilizing an optical autocollimating method, the laser polarization direction is adjusted and output to be parallel to the o-axis or e-axis of the large-caliber crystal by utilizing a polarizer and an analyzer, a transmission ratio of the o-light or e-light of the large-caliber crystal in a specific polarization state is measured, and a single-point absorption coefficient formula of the crystalline material on o-light or e-light is deduced by utilizing a Beer-Lambert law, so that the absorption coefficient of the large-caliber crystal can be measured, and finally, the large-caliber crystalline material is subjected to scanning and splicing measurement through a high-precision scanning sample platform deck mechanism, and precision measurement of the large-caliber crystalline material on the optical absorption coefficient of the o-light or e-light is realized.

Description

technical field [0001] The invention belongs to the field of optical element detection equipment, and in particular relates to a device for measuring the light absorption coefficient of a crystal material, in particular to a method for measuring the light absorption coefficient of the o-axis or e-axis of a large-aperture crystal material in a specific polarization state. Background technique [0002] Crystal materials are widely used in high-tech fields such as laser frequency conversion, electro-optical modulation, and optical fast switching. Among the many performance parameters of crystals, the optical absorption coefficient varies with wavelengths and is anisotropic. , the material absorbs light differently. The frequency doubling crystal used to generate the second harmonic absorbs part of the fundamental and harmonic power, resulting in uneven changes in the crystal's refractive index, causing mismatch, and affecting the improvement of frequency doubling efficiency. T...

Claims

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Application Information

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IPC IPC(8): G01N21/21
Inventor 刘旭陈波范纪红姜昌录刘勇姜洪振任寰杨斌黎高平侯西旗
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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