Abstract

A high-precision measurement of distributed polarization crosstalk (DPC) is necessary for developing the device with an ultrahigh polarization extinction ratio of even more than 80 dB. Optical frequency domain polarimetry (OFDP) is a novel DPC measurement method with a potential ultra-wide dynamic range. The degradation of dynamic range caused by interference phase error is a common issue in optical frequency domain measurement techniques. In this work, we enhanced the dynamic range by solving the phase error problem induced by the laser frequency sweep nonlinearity to improve the measurement precision of weak polarization crosstalk. The aliasing issue caused by the fluctuation of the frequency sweep rate is the primary reason for the limited dynamic range. We proposed a modified dynamic range limit model of OFDP considering the aliasing issue. The experimental results agree with the inflection points predicted by the modified dynamic range limit model. Under the guidance of the model, we achieved a dynamic range of more than 115 dB with different optical path differences of the interferometer and various sweep rates of the laser. Compared to the DPC measurement method with a dynamic range of 100 dB, the measurement repeatability is improved from 7.0 dB to <1.0 dB for polarization crosstalk less than −95 dB.

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

Zhangjun Yu, Qinqin Zhuang, Yuhao Lin, Yicheng Lin, Cuofu Lin, Bowei Rang, Yonggui Yuan, Jun Yang, Kunhua Wen, Pengbai Xu, Yuncai Wang, and Yuwen Qin
Opt. Lett. 47(16) 4271-4274 (2022)

Optical frequency domain polarimetry based on a self-referenced unbalanced Mach–Zehnder interferometer

Qinqin Zhuang, Yicheng Lin, Cuofu Lin, Zhangjun Yu, Yonggui Yuan, Jun Yang, Kunhua Wen, Pengbai Xu, Yuncai Wang, and Yuwen Qin
Opt. Lett. 48(11) 2817-2820 (2023)

Suppression of nonlinear frequency sweep in an optical frequency-domain reflectometer by use of Hilbert transformation

Tae-Jung Ahn, Ji Yong Lee, and Dug Young Kim
Appl. Opt. 44(35) 7630-7634 (2005)

Phase noise elimination in frequency sweeping interferometry based on a common-path interferometer

Cuofu Lin, Chen Zou, Tieliang Mou, Yunlong Zhu, Fanyang Dang, Zhangjun Yu, Yonggui Yuan, Jun Yang, Yuncai Wang, and Yuwen Qin
Opt. Lett. 47(18) 4810-4813 (2022)

Optical frequency domain reflectometry with broadened frequency sweep range assisted by a dual electro-optic frequency comb

Yidai Zhu, Xinyu Fan, Zhaopeng Zhang, Zhengchao Yuan, Bingxin Xu, and Zuyuan He
Opt. Lett. 48(19) 4937-4940 (2023)