强激光与粒子束2024，Vol.36Issue(1)：97-102,6.DOI:10.11884/HPLPB202436.240014
2.7～3.0μm波段高反镜反射率测量研究
Reflectivity measurement of highly reflective mirrors at spectral band of 2.7-3.0 μm
周文超 1魏千翯 2彭琛 3黄德权 3朱日宏4
作者信息
- 1. 南京理工大学电子工程与光电技术学院,南京 210094||中国工程物理研究院应用电子学研究所,四川绵阳 621900
- 2. 电子科技大学光电科学与工程学院,成都 610054
- 3. 中国工程物理研究院应用电子学研究所,四川绵阳 621900
- 4. 南京理工大学电子工程与光电技术学院,南京 210094
- 折叠
摘要
Abstract
The highly reflective(HR)mirrors with high-performance are widely employed in mid-infrared(mid-IR)laser systems.The manufacturing of mid-IR HR mirrors with high reflectivity requires techniques to precisely measure their high reflectivity.In this paper,a continuous-wave cavity ring-down(CRD)experimental apparatus in the 2.7-3.0 μm spectral range is established based on a quantum-cascade laser for high reflectivity measurement.By precisely optimizing the laser wavelength within the reflection band of the mid-IR HR mirrors,analyzing the influence of water vapor absorption on the ring-down time and reflectivity measurements,and comparing the reflectivity results measured under ambient air in clean-room laboratory and under nitrogen purging,the accurate measurement of high reflectivity is achieved at the 2.7-3.0 μm spectral band with an absolute reflectivity measurement accuracy of below 2×10-5 for about 99.95%reflectivity.The experimental results demonstrate that by setting the laser wavelength precisely to 2.9 μm and employing equal lengths of initial and test ring-down cavities(RDC)to avoid the influence of water vapor's absorption lines,the reflectivity measurement for the 2.7-3.0 μm spectral band can be performed under normal clean-room laboratory air,without the need of nitrogen purging.关键词
中红外/高反镜/反射率/光腔衰荡/水汽吸收Key words
mid-infrared/highly reflective mirror/reflectivity/cavity ring-down/absorption of water vapor分类
信息技术与安全科学引用本文复制引用
周文超,魏千翯,彭琛,黄德权,朱日宏..2.7～3.0μm波段高反镜反射率测量研究[J].强激光与粒子束,2024,36(1):97-102,6.
