用于超镜光学损耗表征的近红外扫描腔衰荡技术。

Near-infrared scanning cavity ringdown for optical loss characterization of supermirrors.

作者信息

Truong G W, Winkler G, Zederbauer T, Bachmann D, Heu P, Follman D, White M E, Heckl O H, Cole G D

出版信息

Opt Express. 2019 Jul 8;27(14):19141-19149. doi: 10.1364/OE.27.019141.

DOI:10.1364/OE.27.019141

Abstract

A cavity ringdown system for probing the spatial variation of optical loss across high-reflectivity mirrors is described. This system is employed to examine substrate-transferred crystalline supermirrors and to quantify the effect of manufacturing process imperfections. Excellent agreement is observed between the ringdown-generated spatial measurements and differential interference contrast microscopy images. A 2-mm diameter ringdown scan in the center of a crystalline supermirror reveals highly uniform coating properties with excess loss variations below 1 ppm.

摘要

描述了一种用于探测高反射率镜面上光学损耗空间变化的光腔衰荡系统。该系统用于检查衬底转移的晶体超镜，并量化制造工艺缺陷的影响。在衰荡产生的空间测量结果与微分干涉对比显微镜图像之间观察到了极佳的一致性。在晶体超镜中心进行的直径为2毫米的衰荡扫描显示，涂层特性高度均匀，额外损耗变化低于1ppm。