Narrow linewidth short-cavity random fiber laser with a π-phase shift grating

Shuaijie Miao; Wentao Zhang; Ying Song; Fang Li

doi:10.1117/12.2541238

28 August 2019 Narrow linewidth short-cavity random fiber laser with a π-phase shift grating

Shuaijie Miao, Wentao Zhang, Ying Song, Fang Li

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111993A (2019) https://doi.org/10.1117/12.2541238
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

Abstract

We proposed a novel structure of short-cavity random fiber laser (RFL) with a stable narrow linewidth output. A random-spaced Bragg grating array is used for random feedback. A ring optical path and the grating array form a short half-open cavity, and a high-precision π-phase-shifted grating (π-FBG) is placed in the ring path for filtering and modelocking to ensure a stable single-mode random laser operation. The linewidth of the laser is 257 Hz with 50 dB sidemode-suppression-ratio (SMSR). The laser wavelength drift measured in the laboratory is less than 1 pm within 20 min. The RFL has a simple structure and can achieve a stable narrow linewidth single mode output, which provides a new choice for high resolution optical fiber sensing.

Citation Download Citation

Shuaijie Miao, Wentao Zhang, Ying Song, and Fang Li "Narrow linewidth short-cavity random fiber laser with a π-phase shift grating", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111993A (28 August 2019); https://doi.org/10.1117/12.2541238

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