双频自注入锁定分布反馈激光器在布里渊光时域分析中的应用。

Application of Dual-Frequency Self-Injection Locked DFB Laser for Brillouin Optical Time Domain Analysis.

作者信息

Lopez-Mercado Cesar A, Korobko Dmitry A, Zolotovskii Igor O, Fotiadi Andrei A

机构信息

Scientific Research and Advanced Studies Center of Ensenada (CICESE), 22860 Ensenada, BC, Mexico.

S.P. Kapitsa Research Institute of Technology, Ulyanovsk State University, 42 Leo Tolstoy Street, 432970 Ulyanovsk, Russia.

出版信息

Sensors (Basel). 2021 Oct 15;21(20):6859. doi: 10.3390/s21206859.

DOI:10.3390/s21206859

PMID:34696075

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8538743/

Abstract

Self-injection locking to an external fiber cavity is an efficient technique enabling drastic linewidth narrowing of semiconductor lasers. Recently, we constructed a simple dual-frequency laser source that employs self-injection locking of a DFB laser in the external ring fiber cavity and Brillouin lasing in the same cavity. The laser performance characteristics are on the level of the laser modules commonly used with BOTDA. The use of a laser source operating two frequencies strongly locked through the Brillouin resonance simplifies the BOTDA system, avoiding the use of a broadband electrooptical modulator (EOM) and high-frequency electronics. Here, in a direct comparison with the commercial BOTDA, we explore the capacity of our low-cost solution for BOTDA sensing, demonstrating distributed measurements of the Brillouin frequency shift in a 10 km sensing fiber with a 1.5 m spatial resolution.

摘要

自注入锁定到外部光纤腔是一种有效的技术，可实现半导体激光器线宽的大幅窄化。最近，我们构建了一种简单的双频激光源，该激光源采用分布反馈（DFB）激光器在外部环形光纤腔中的自注入锁定以及在同一腔内的布里渊激光振荡。其激光性能特性与常用于布里渊光时域分析（BOTDA）的激光模块相当。使用通过布里渊共振实现两个频率强锁定的激光源简化了BOTDA系统，避免了使用宽带电光调制器（EOM）和高频电子设备。在此，通过与商用BOTDA的直接比较，我们探索了我们用于BOTDA传感的低成本解决方案的能力，展示了在10 km传感光纤中以1.5 m空间分辨率进行布里渊频移的分布式测量。