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9 October 2021 Multimode diode-pumped graded-index fiber Raman laser with pulsed generation in all-fiber scheme
Alexey G. Kuznetsov, S. I. Kablukov, S. A. Babin
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Proceedings Volume 11890, Advanced Lasers, High-Power Lasers, and Applications XII; 118901A (2021) https://doi.org/10.1117/12.2601490
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China
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Abstract
We report on a pulsed regime of Raman laser with all-fiber cavity scheme based on a multimode graded-index fiber directly pumped by a CW multimode laser diode. The cavity was performed with 3.7 km 62.5/125 MM graded-index fiber with two FBGs on the both sides of it. Intra-cavity acousto-optic modulator pigtailed with 10/125 fiber allowed to obtain mode locking regime. At 27.19-kHz repetition rate corresponding to the laser cavity round-trip frequency (corresponding to mode-locking regime), stable nanosecond pulses with 6.3 W peak power have been observed at the 1st (1018 nm) Stokes order. The beam quality of generated pulses is greatly improved as compared to that for pump diode (M2<20) reaching M2=2.86 for the 1st Stokes and M2=2.08 for the 2nd Stokes beams.
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Alexey G. Kuznetsov, S. I. Kablukov, and S. A. Babin "Multimode diode-pumped graded-index fiber Raman laser with pulsed generation in all-fiber scheme", Proc. SPIE 11890, Advanced Lasers, High-Power Lasers, and Applications XII, 118901A (9 October 2021); https://doi.org/10.1117/12.2601490
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KEYWORDS
Raman spectroscopy
Fiber lasers
Multimode fibers
Pulsed laser operation
Fiber Bragg gratings
Graded index fibers
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