TY - GEN

T1 - Narrow-band lasing in a random distributed feedback fiber laser with embedded SNAP microresonator

AU - Kudashkin, D. V.

AU - Gorbunov, O. A.

AU - Vatnik, I. D.

AU - Churkin, D. V.

N1 - D. V. Kudashkin, O. A. Gorbunov, I. D. Vatnik, and D. V. Churkin "Narrow-band lasing in a random distributed feedback fiber laser with embedded SNAP microresonator", Proc. SPIE 13711, Advanced Lasers, High-Power Lasers, and Applications XVI, 137110N (19 November 2025); https://doi.org/10.1117/12.3075053 The study was supported by the Russian Science Foundation (24-12-00432), https://rscf.ru/en/project/24-12-00432/

PY - 2025/11/19

Y1 - 2025/11/19

N2 - This work demonstrates a method for achieving stable, single-frequency operation in a random fiber laser (FLRDF) by embedding an external whispering gallery mode (WGM) microresonator. While typical FLRDFs exhibit a stochastic, multi-mode output, the introduction of the microresonator as a narrow-band feedback element leads to a pure single-mode generation regime just above the lasing threshold. The resulting mode features a spectral width of less than 10 MHz, a long-term temporal stability of thousands of seconds, and an output power of approximately 3 mW, with its central wavelength determined by a resonance of the microresonator. At higher pump powers, the laser transitions to a multi-mode regime. However, a statistical analysis of the intermode intervals reveals a distinct peak corresponding to the microresonator's free spectral range (180 MHz), confirming its continued influence on the generation spectrum. These results establish the embedding of a microresonator as a robust technique for stabilizing random fiber lasers.

AB - This work demonstrates a method for achieving stable, single-frequency operation in a random fiber laser (FLRDF) by embedding an external whispering gallery mode (WGM) microresonator. While typical FLRDFs exhibit a stochastic, multi-mode output, the introduction of the microresonator as a narrow-band feedback element leads to a pure single-mode generation regime just above the lasing threshold. The resulting mode features a spectral width of less than 10 MHz, a long-term temporal stability of thousands of seconds, and an output power of approximately 3 mW, with its central wavelength determined by a resonance of the microresonator. At higher pump powers, the laser transitions to a multi-mode regime. However, a statistical analysis of the intermode intervals reveals a distinct peak corresponding to the microresonator's free spectral range (180 MHz), confirming its continued influence on the generation spectrum. These results establish the embedding of a microresonator as a robust technique for stabilizing random fiber lasers.

KW - Whispering gallery modes microresonators

KW - Random distributed fiber laser

UR - https://www.scopus.com/pages/publications/105024752850

UR - https://www.mendeley.com/catalogue/b5e39012-7e18-3444-8418-7a2d9469e80a/

U2 - 10.1117/12.3075053

DO - 10.1117/12.3075053

M3 - Conference contribution

VL - 13711

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Proceedings of SPIE - The International Society for Optical Engineering

A2 - Jiang, Shibin

A2 - Li, Zhaoyang

A2 - Hartl, Ingmar

PB - The International Society for Optical Engineering

T2 - SPIE/COS Photonics Asia 2025

Y2 - 12 October 2025 through 14 October 2025

ER -