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首页> 外文期刊>Optical engineering >Folded Fabry-Perot interferometer based on acousto-optic modulator tuned He Ne laser source
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Folded Fabry-Perot interferometer based on acousto-optic modulator tuned He Ne laser source

机译：基于声光调制器调谐氦氖激光源的折叠法布里-珀罗干涉仪

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摘要

A cost effective folded Fabry-Perot (F-P) interferometer is developed using a He-Ne laser source tuned by acousto-optic modulators (AOM). The two AOMs are employed to expand the frequency tuning range of the tracking He-Ne laser. The configuration and diffraction efficiency of each AOM is fully investigated to maintain balanced efficiency along the whole frequency tuning range. The optical phase modulated Pound-Drever-Hall frequency locking technique is employed in this system to minimize the locking error of the F-P cavity resonance. The displacement of the target corner cube reflector is converted to the tracking frequency change and measured by beating with an iodine-stabilized laser. A self-developed xPC target system is employed to accomplish the frequency locking, data acquisition, and air refractive index compensation in the overall system. A displacement comparison experiment between the F-P interferometer and a commercial interferometer shows the residual error is within ±4 nm in the range of 500 nm.
机译：使用通过声光调制器（AOM）调谐的He-Ne激光源，开发出了一种经济高效的折叠Fabry-Perot（F-P）干涉仪。两个AOM用于扩展跟踪He-Ne激光器的频率调谐范围。充分研究了每个AOM的配置和衍射效率，以在整个频率调谐范围内保持平衡的效率。在该系统中采用了光学相位调制的Pound-Drever-Hall频率锁定技术，以最小化F-P腔共振的锁定误差。目标角锥棱镜反射器的位移被转换为跟踪频率变化，并通过用碘稳定的激光器拍打来测量。自行开发的xPC目标系统用于完成整个系统的频率锁定，数据采集和空气折射率补偿。 F-P干涉仪和商用干涉仪之间的位移比较实验表明，残留误差在500 nm范围内在±4 nm之内。

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