Abstract

We propose an optical frequency domain reflectometry (OFDR) with the assistance of a dual electro-optic frequency comb (EOFC), which is intended to improve the system spatial resolution. As the spatial resolution of an OFDR system is inversely proportional to the frequency sweep range, the EOFC acts as a multi-frequency light source for collecting Rayleigh backscattering signals, which are combined to extend the effective frequency sweep range. By utilizing this technique, we have successfully expanded the experimental frequency sweep range to hundreds of gigahertz, achieving a sub-millimeter spatial resolution.

© 2023 Optica Publishing Group

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)

Dual electro-optic frequency comb photonic thermometry

Adam J. Fleisher, Zeeshan Ahmed, Tobias Herman, and Matthew R. Hartings
Opt. Lett. 48(9) 2210-2213 (2023)

Ultrafine electro-optical frequency comb based on cascade phase modulation with cyclic frequency shifting

Changhe Wang, Yuxin Sun, Qilai Zhao, Changsheng Yang, Chun Zeng, Zhouming Feng, Yu Zhang, Li Li, Kaijun Zhou, Xiaoming Wei, Zhongmin Yang, and Shanhui Xu
Opt. Lett. 48(17) 4665-4668 (2023)

Large dynamic strain measurement via slope-assisted Brillouin optical time domain reflectometry using a frequency equalizer

Ge Liu, Dongjiang Zou, Ruoxue Wei, Tian Li, Guiguang Chen, and Junhui Hu
Opt. Lett. 48(6) 1407-1410 (2023)

Massively parallel FMCW lidar with cm range resolution using an electro-optic frequency comb

Bibo He, Chenbo Zhang, Jiachuan Yang, Nuo Chen, Xuanjian He, Jinming Tao, Zhike Zhang, Tao Chu, Zhangyuan Chen, and Xiaopeng Xie
Opt. Lett. 48(13) 3621-3624 (2023)