Accuracy and longitudinal-mode-selection performance of etalon in pulsed single longitudinal laser
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摘要: 根据脉冲单纵模激光器中的关键器件F-P标准具的选模原理，定量分析了不同参数F-P标准具的加工厚度精度、角度放置精度以及腔长变化对激光器纵模选择性能产生的影响，得到了对不同参数标准具的光学厚度偏差进行补偿所需的角度偏移量，研究了入射角度对标准具中心波长偏移的影响。这些结果对于脉冲单纵模激光器的机械结构设计、器件加工允差与装配调节精度的设计具有重要意义。在线型腔F-P标准具选模激光器中，得到了最大单脉冲能量8.41 J，脉冲宽度32 ns，近衍射极限的单纵模激光脉冲输出。Abstract: According to the principle of longitudinal-mode-selecting by etalon in pulsed single longitudinal laser, the influences of thickness accuracy and position accuracy of various F-P etalons on the performance of longitudinal mode selecting are analyzed quantitatively. In order to compensate the thickness deviation of etalon, the angle detuning of various etalons are calculated. Then the effects of the incident angle deviation on transmittance curve of F-P etalon are investigated. These are important for setting the mechanical structure design, the tolerance of devices, and the adjustment accuracy of the pulsed single longitudinal laser. In the linear-cavity laser with an F-P etalon for mode-selecting, a near-diffraction-limited single longitude pulsed output is obtained. The maximum single pulse output energy is 8.41 J and the pulse width is 32 ns.
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