Brillouin optical time domain analysis with dual-frequency self-injection locked DFB laser

Cesar Lopez-Mercado; Pavel Itrin; Dmitry A. Korobko; Igor O. Zolotovskii; Andrei A. Fotiadi

doi:10.1117/12.2621130

17 May 2022 Brillouin optical time domain analysis with dual-frequency self-injection locked DFB laser

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

Proceedings Volume 12139, Optical Sensing and Detection VII; 121391D (2022) https://doi.org/10.1117/12.2621130
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Conference Poster

Abstract

Self-injection locking to an external fiber cavity is an efficient technique enabling drastic linewidth narrowing of semiconductor lasers. Recently, we have introduced 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 Brillouin Optical Time Domain Analysis (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. In this work, 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.

Citation Download Citation

Cesar Lopez-Mercado, Pavel Itrin, Dmitry A. Korobko, Igor O. Zolotovskii, and Andrei A. Fotiadi "Brillouin optical time domain analysis with dual-frequency self-injection locked DFB laser", Proc. SPIE 12139, Optical Sensing and Detection VII, 121391D (17 May 2022); https://doi.org/10.1117/12.2621130

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