Abstract

We present and demonstrate a method based on a periodic phase noise estimation in an optical frequency domain reflectometry (OFDR) capable of a beyond 10⁷ range-resolution⁻¹ product (RRP) for the first time, which corresponds to 2.5 × improvement compared with the state-of-the-art. The moving average filter is employed to suppress the amplification of noise in the derivation process. Further, with the help of a third-order Taylor expansion, this method provides a highly precise estimation of periodic phase noise, which is the main factor impacting the performance of OFDR systems with medium-to-long measurement range combined with a submillimeter spatial resolution. A spatial resolution within 535 $\mathrm{\mu} {\textrm {m}}$ over the measurement range of 8 km is obtained. The proposed method offers a promising technique for fiber network monitoring and sensing applications.

© 2022 Optica Publishing Group

Distributed high-temperature sensing based on optical frequency domain reflectometry with a standard single-mode fiber

Huajian Zhong, Cailing Fu, Pengfei Li, Bin Du, Chao Du, Yanjie Meng, and Yiping Wang
Opt. Lett. 47(4) 882-885 (2022)

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)

High-spatial-resolution distributed acoustic sensor based on the time-frequency-multiplexing OFDR

Zixuan Zhong, Tao Liu, Haoting Wu, Junjie Qiu, Boyang Du, Guolu Yin, and Tao Zhu
Opt. Lett. 48(21) 5803-5806 (2023)

Ultra-linear broadband optical frequency sweep for a long-range and centimeter-spatial-resolution OFDR

Huajian Zhong, Cailing Fu, Pengfei Li, Bin Du, Chao Du, Yanjie Meng, Xiaoyu Yin, Changrui Liao, and Yiping Wang
Opt. Lett. 48(17) 4540-4543 (2023)

Submillimeter-spatial-resolution φ-OFDR strain sensor using femtosecond laser induced permanent scatters

Yanjie Meng, Cailing Fu, Lin Chen, Chao Du, Huajian Zhong, Yiping Wang, Jun He, and Weijia Bao
Opt. Lett. 47(23) 6289-6292 (2022)