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1 August 2021 Ultra-narrow spectral modes in generation of random distributed feedback Raman fiber laser
Artem E. Kirik, Ilya D. Vatnik, Dmitry V. Churkin
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Proceedings Volume 11796, Active Photonic Platforms XIII; 117962S (2021) https://doi.org/10.1117/12.2594718
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
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Abstract
We directly observe ultra-narrow spectral modes in the generation of the random fiber laser by using a technique of optical heterodyning in real-time. These solitary spectral features appear slightly above the threshold of generation. We found that such modes could have a spectral width well below 3 MHz. These modes are spatially extended over the fiber laser length, and remain for tens of roundtrip times.
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Artem E. Kirik, Ilya D. Vatnik, and Dmitry V. Churkin "Ultra-narrow spectral modes in generation of random distributed feedback Raman fiber laser", Proc. SPIE 11796, Active Photonic Platforms XIII, 117962S (1 August 2021); https://doi.org/10.1117/12.2594718
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KEYWORDS
Fiber lasers
Heterodyning
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