Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
Mode decomposition of output beams in LD-pumped graded-index fiber Raman lasers. / Kharenko, Denis S.; Gervaziev, Mikhail D.; Kuznetsov, Alexey G. и др.
Advanced Lasers, High-Power Lasers, and Applications XII. ред. / Shibin Jiang; Ingmar Hartl; Jun Liu. SPIE, 2021. 118901B (Proceedings of SPIE - The International Society for Optical Engineering; Том 11890).Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
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TY - GEN
T1 - Mode decomposition of output beams in LD-pumped graded-index fiber Raman lasers
AU - Kharenko, Denis S.
AU - Gervaziev, Mikhail D.
AU - Kuznetsov, Alexey G.
AU - Wabnitz, Stefan
AU - Podivilov, Evgeniy V.
AU - Babin, Sergey A.
N1 - Funding Information: The study was supported by the Russian Foundation for Basic Research (Grant No. 21-42-00019). Publisher Copyright: © 2021 SPIE.
PY - 2021
Y1 - 2021
N2 - All-fiber Raman lasers have demonstrated their potential for the efficient conversion of highly multimode pump beams into a high-quality Stokes beams. However, the modal content of these beams has not been investigated yet. Here we apply, for the first time, a mode decomposition technique for revealing intermodal interactions in different operational regimes of CW multimode Raman lasers. Our approach allows for analyzing the output laser radiation in terms of the amplitude and phase distributions of a huge number of excited modes for both the pump and the Stokes beams, which enables a new insight into nonlinear mode coupling processes. The measured contribution of the first three modes of the residual pump beam after overcoming the SRS threshold decreased on average by 25%, whereas the signal beam mainly consists of fundamental mode (40%) and the modes of the first group (20%).
AB - All-fiber Raman lasers have demonstrated their potential for the efficient conversion of highly multimode pump beams into a high-quality Stokes beams. However, the modal content of these beams has not been investigated yet. Here we apply, for the first time, a mode decomposition technique for revealing intermodal interactions in different operational regimes of CW multimode Raman lasers. Our approach allows for analyzing the output laser radiation in terms of the amplitude and phase distributions of a huge number of excited modes for both the pump and the Stokes beams, which enables a new insight into nonlinear mode coupling processes. The measured contribution of the first three modes of the residual pump beam after overcoming the SRS threshold decreased on average by 25%, whereas the signal beam mainly consists of fundamental mode (40%) and the modes of the first group (20%).
KW - Beam characterization
KW - Digital holography
KW - Fiber lasers
KW - Graded-index fiber
KW - Mode decomposition
KW - Multimode lasers
KW - Raman lasers
KW - Spatial light modulator
UR - http://www.scopus.com/inward/record.url?scp=85122481037&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/25a30d90-23f0-3ef5-91ec-b8be3063391b/
U2 - 10.1117/12.2601512
DO - 10.1117/12.2601512
M3 - Conference contribution
AN - SCOPUS:85122481037
SN - 9781510646292
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Advanced Lasers, High-Power Lasers, and Applications XII
A2 - Jiang, Shibin
A2 - Hartl, Ingmar
A2 - Liu, Jun
PB - SPIE
T2 - Advanced Lasers, High-Power Lasers, and Applications XII 2021
Y2 - 10 October 2021 through 12 October 2021
ER -
ID: 35173590