Open AccessSimultaneous determination of optical loss, residual reflectance and transmittance of highly anti-reflective coatings with cavity ring down technique
Author(s) -
Bincheng Li,
Hao Cui,
Yu Han,
Lei Gao,
Chaowei Guo,
Chunming Gao,
Yafei Wang
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.029135
Subject(s) - transmittance , materials science , optics , laser , repeatability , attenuation coefficient , residual , dye laser , scattering , absorption (acoustics) , cavity ring down spectroscopy , optoelectronics , chemistry , physics , chromatography , algorithm , computer science , composite material
Cavity ring down (CRD) technique was employed to measure optical losses (absorption and scattering losses), residual reflectance and transmittance of anti-reflectively (AR) coated laser components with transmittance higher than 99.9%. By inserting the AR coated laser component with parallel optical surfaces into the ring-down cavity and measuring the ring-down time versus the angle of incidence with respect to the surface normal, the optical loss and residual reflectance of the laser component were determined respectively at normal and out-of-normal incidences with repeatability of part-per-million level. The transmittance was also determined simultaneously. Experimental results demonstrated that CRD is a simple, inexpensive and fast technique for highly accurate measurements of optical loss, residual reflectance, and transmittance of AR coated laser components widely used in high-power laser systems.