Abstract

This Letter demonstrates the successful use of free-space optics (FSO) as a transition channel for an air segment in transmitting Raman backscattering signals for distributed temperature sensing (DTS). A barrier-free air segment link shaped by an FSO is part of the Raman-based DTS (RDTS) fiber optic transmission route. For this plan, the FSO enables delivery of the RDTS’s pulse with the low-loss transmission over the air segment while also returning to the RDTS the varied Raman backscattered signals from the probing temperature variations for signal interpretation. The difference between various temperatures sensed and the referential air temperature remains nearly the same before and after passing the FSO. The viability of this technology provides a crucial basis for tackling the high expense of installing and repairing DTS cables and the challenges associated with doing so owing to topographical restrictions.

© 2023 Optica Publishing Group

Scanning-free hybrid Rayleigh–Brillouin distributed fiber-optic sensing system

Linjing Huang, Xinyu Fan, and Zuyuan He
Opt. Lett. 48(17) 4629-4632 (2023)

Sapphire-fiber-based distributed high-temperature sensing system

Bo Liu, Zhihao Yu, Cary Hill, Yujie Cheng, Daniel Homa, Gary Pickrell, and Anbo Wang
Opt. Lett. 41(18) 4405-4408 (2016)

Distributed temperature sensors operating at 840 nm for short-range sensing applications

Luís C. B. Silva and Marcelo E. V. Segatto
Appl. Opt. 62(16) E96-E102 (2023)

Experimental demonstration of an 8-Gbit/s free-space secure optical communication link using all-optical chaos modulation

Yiqun Zhang, Mingfeng Xu, Mingbo Pu, Qiang Chen, Mengjie Zhou, Shuangcheng Chen, Kun Qiu, Ning Jiang, and Xiangang Luo
Opt. Lett. 48(6) 1470-1473 (2023)

Ultra-long chaotic FBG sensing with high-order random fiber lasing amplification

Bing Han and Han Wu
Opt. Lett. 48(5) 1280-1283 (2023)