Add to BibSonomy
Abstract
Undersea earthquake-triggered giant tsunamis pose significant threats to coastal areas, spanning thousands of kilometers and affecting populations, ecosystems, and infrastructure. To mitigate their impact, monitoring seismic activity in underwater environments is crucial. In this study, we propose a new, to the best of our knowledge, approach for monitoring vibrations in submarine optical cables. By detecting vibration-induced polarization rotation, our dual-wavelength fiber-optic sensing system enables precise measurement of acoustic/vibration amplitude, frequency, and position. As a proof of concept, a double-ended forward-transmission distributed fiber-optic vibration sensor was demonstrated with a single vibration source with a sensitivity of 3.4 mrad/µε at 100 Hz (20 m fiber on PZT), limit of detection of 1.7 pε/Hz1/2 at 100 Hz, sensing range of 121.5 km without an optical amplifier, spatial resolution of 5 m, and position error as small as 34 m. The vibration frequency range tested is from 0.01 to 100 Hz. The sensing system has several advantages, including elegant setup, noise mitigation, and super-long sensing distance.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
George Y. Chen, Kuan Liu, Xing Rao, Yuhang Wang, Mamoona Khalid, Jun He, and Yiping Wang
Opt. Lett. 48(18) 4825-4828 (2023)
Lieke D. van Putten, Ali Masoudi, and Gilberto Brambilla
Opt. Lett. 44(24) 5925-5928 (2019)
Cailing Fu, Ronglong Sui, Zhenwei Peng, Yanjie Meng, Huajian Zhong, Rongyi Shan, Wenfa Liang, Changrui Liao, Xiaoyu Yin, and Yiping Wang
Opt. Lett. 48(21) 5819-5822 (2023)