Raman lasing in multimode graded-index fiber with mode-selective dielectric mirror on its end face

Alexey G. Kuznetsov; Vadim S. Terentyev; Victor A. Simonov; Hiba Rizk; Ilya N. Nemov; Kirill A. Bronnikov; Semen A. Gladkikh; Alexandr V. Dostovalov; Sergey A. Babin

doi:10.1117/12.3017782

20 June 2024 Raman lasing in multimode graded-index fiber with mode-selective dielectric mirror on its end face

Alexey G. Kuznetsov, Vadim S. Terentyev, Victor A. Simonov, Hiba Rizk, Ilya N. Nemov, Kirill A. Bronnikov, Semen A. Gladkikh, Alexandr V. Dostovalov, Sergey A. Babin

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Proceedings Volume 13001, Specialty Optical Fibres VIII; 130010N (2024) https://doi.org/10.1117/12.3017782
Event: SPIE Photonics Europe, 2024, Strasbourg, France

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Abstract

An output dielectric mirror is deposited on the central part (~15 μm diameter) at the end face of a 1-km graded-index fiber and tested as output mirror of multimode Raman laser with highly-multimode (M²~34) 940-nm LD pumping. In the cavity with highly-reflective input FBG, Raman lasing of Stokes wave at 976 nm starts at the threshold pump power of ~80 W. The output beam quality factor measured near the threshold (~1W at 976 nm) M²~2 confirms mode selective properties of such output mirror. The power scaling capabilities at increased pump power together with a more detailed characterization of the output beam (spatial profile, spectrum and its stability) are performed and the obtained characteristics are compared with those for output coupling based on Fresnel reflection from the mirror-free fiber end face.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Alexey G. Kuznetsov, Vadim S. Terentyev, Victor A. Simonov, Hiba Rizk, Ilya N. Nemov, Kirill A. Bronnikov, Semen A. Gladkikh, Alexandr V. Dostovalov, and Sergey A. Babin "Raman lasing in multimode graded-index fiber with mode-selective dielectric mirror on its end face", Proc. SPIE 13001, Specialty Optical Fibres VIII, 130010N (20 June 2024); https://doi.org/10.1117/12.3017782

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