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首页> 外文期刊>Applied optics >Fabrication of a thermally actuated tunable grating and its application as a CO_(2) laser beam profile analyzer
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Fabrication of a thermally actuated tunable grating and its application as a CO_(2) laser beam profile analyzer

机译：热激励可调光栅的制作及其在CO_（2）激光束轮廓分析仪中的应用

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摘要

We propose a thermally actuated tunable grating for measuring the beam profile of a CO_(2) laser. The grooves of a transmissive grating are filled with a liquid whose refractive index depends on temperature. A visible laser as a probe and a CO_(2) laser as a heat source are illuminated on the grating. The CO_(2) laser is absorbed, and depending on its beam profile, a temperature profile is induced on the grating. The refractive index of the heated liquid is changed, resulting in a change of efficiency of the grating for the probe laser. By using the 1st orders of diffraction in a 4f imaging system, the beam profile of the CO_(2) laser is imaged onto a CCD camera by the probe laser.
机译：我们提出一种用于测量CO_（2）激光束轮廓的热激励可调光栅。透射光栅的凹槽中充满了折射率取决于温度的液体。可见光激光器作为探针，CO_（2）激光器作为热源照射在光栅上。 CO_（2）激光被吸收，并根据其光束轮廓在光栅上感应出温度轮廓。加热的液体的折射率改变，导致探测激光器的光栅效率改变。通过在4f成像系统中使用一阶衍射，CO_（2）激光器的光束轮廓通过探测激光器成像到CCD摄像机上。

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