Gain-induced Kerr beam cleaning in a femtosecond fiber amplifier
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Gain-induced Kerr beam cleaning in a femtosecond fiber amplifier
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| Creator |
Haig, Henry
Bender, Nicholas Chen, Yi-Hao Dhar, Anirban Choudhury, Nilotpal Sen, Ranjan Christodoulides, Demetrios N Wise, Frank |
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| Subject |
Processing Science
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| Description |
Kerr beam cleaning is a nonlinear phenomenon in graded-index multimode fiber where power flows toward the fundamental mode, generating bell-shaped output beams. Here we study beam cleaning of femtosecond pulses accompanied by gain in a multimode fiber amplifier. Mode-resolved energy measurements and numerical simulations showed that the amplifier generates beams with high fundamental mode content (greater than 30% of the overall pulse energy) for a wide range of amplification levels. Control experiments using stretched pulses that evolve without strong Kerr nonlinear effects showed a degrading beam profile, in contrast to nonlinear beam cleaning. Temporal measurements showed that seed pulse parameters have a strong effect on the amplified pulse quality. These results may influence the design of future high-performance fiber lasers and amplifiers. (c) 2023 Optica Publishing Group
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| Publisher |
Optical Society of America
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| Date |
2023-06
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| Type |
Article
PeerReviewed |
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| Identifier |
Haig, Henry and Bender, Nicholas and Chen, Yi-Hao and Dhar, Anirban and Choudhury, Nilotpal and Sen, Ranjan and Christodoulides, Demetrios N and Wise, Frank (2023) Gain-induced Kerr beam cleaning in a femtosecond fiber amplifier. Journal of the Optical Society of America B-Optical Physics , 40 (6). pp. 1510-1517. ISSN 0740-3224
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| Relation |
http://cgcri.csircentral.net/5604/
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