强激光与粒子束, 2005, 17 (3): 335, 网络出版: 2006-04-28
用光腔衰荡技术测量镜片的反射率
Analysis of reflectivity measurement by cavity ring-down spectroscopy
光腔衰荡光谱技术(CRDS) 反射率 衰荡时间 直腔 折叠腔 Cavity ring-down spectroscope （CRDS） Reflectivity Ring-down time Straight cavity Folded cavity
摘要
根据光腔衰荡光谱技术原理,建立了测量镜片反射率的实验装置.利用该装置测定了一对反射率相等的高反射腔镜,反射率测试结果为(99.925±0.001)%;以22.5°将直腔变为折叠腔,测得的反射率为(99.992±0.003)%.重复测定反射镜样品的反射率,精度达到10-5.该测量装置可用于超低损耗薄膜高反射镜反射率的精确测量.轻微移动探测器位置,对腔镜的测试结果影响不大.
Abstract
This paper presents the experimental method to measure the high reflectivity of optical mirror by cavity ring-down spectroscopy. The experimental system uses a straight cavity composed of a pair of cavity mirrors with same reflectivity or a folded cavity which is formed from the straight cavity to be folded at 22.5° angle, a reflector is laid at folded point.The reflectivity of the cavity mirrors is measured to be(99.925±0.001)% and the reflector to be (99.992±0.003)%.The metrical precision achieves 10-5.The low loss and high reflectivity mirrors can be measured accurately by this setup.
高丽峰, 熊胜明, 李斌成, 张云洞, 蔡邦维. 用光腔衰荡技术测量镜片的反射率[J]. 强激光与粒子束, 2005, 17(3): 335. GAO Li-feng, XIONG Sheng-ming, LI Bin-cheng, ZHANG Yun-dong, CAI Bang-wei. Analysis of reflectivity measurement by cavity ring-down spectroscopy[J]. High Power Laser and Particle Beams, 2005, 17(3): 335.
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