Optical frequency domain polarimetry for distributed polarization crosstalk measurement beyond a 110 dB dynamic range

作者：Zhangjun Yu, Qinqin Zhuang, Yu‐Hao Lin, Yicheng Lin, Cuofu Lin, Bowei Rang, Yonggui Yuan, Jun Yang, Kunhua Wen, Pengbai Xu, Yuncai Wang, Yuwen Qin · 发表于：Optics Letters · 年份：2022 · DOI：10.1364/ol.468893 · 被引用次数：12 · 研究领域：Photonic and Optical Devices、Semiconductor Lasers and Optical Devices、Optical Network Technologies

In this Letter, we present optical frequency domain polarimetry (OFDP), a novel, to the best of our knowledge, distributed polarization crosstalk (DPC) measurement method with a dynamic range beyond 110 dB. It is based on swept-wavelength interferometry using a tunable laser source (TLS) and a delay line interferometer (DLI). The ultrahigh dynamic range is achieved by optimizing the sweep rate of the TLS and the optical path difference of the DLI. Using OFDP, we measured polarization crosstalk below –105 dB in a LiNbO 3 waveguide modulator for the first time. OFDP will play a significant role in developing and fabricating high-performance polarization devices.