Simultaneous measurements of s-and p-polarization reflectivity with a cavity ring-down technique employing no polarization optics

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2017,（5）
• 页码范围: 82-86
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL201715.053101

摘要

The cavity ring-down (CRD) technique is adopted for simultaneously measuring s-and p-polarization reflectivity of highly reflective coatings without employing any polarization optics.As the s-and p-polarized light trapped in the ring-down cavity decay independently,with a randomly polarized light source the ring-down signal recorded by a photodetector presents a double-exponential waveform consisting of ring-down signals of both s-and p-polarized light.The s-and p-polarization reflectivity values of a test mirror are therefore simultaneously determined by fitting the recorded ring-down signal with a double-exponential function.The determined s-and p-polarization reflectivity of 30° and 45° angle of incidence mirrors are in good agreement with the reflectivity values measured with the conventional CRD technique employing a polarizer for polarization control.