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Pulsed generation of multimode diode-pumped graded-index fiber Raman laser
Author(s): Alexey G. Kuznetsov; Ilya N. Nemov; Alexey A. Wolf; Sergey I. Kablukov; Sergey A. Babin
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Paper Abstract

We report on the first demonstration of pulsed regime of Raman laser based on a multimode graded-index fiber directly pumped by a CW multimode laser diode. Proof-of-principle experiments have been performed with a 3.7-km multimode graded-index fiber with 62.5-μm core pumped by 976-nm high-power laser diode and cavity formed by bulk mirror and fiber Bragg grating with intra-cavity acousto-optic modulator providing Q-switching or mode locking. At 27.2-kHz repetition rate corresponding to the laser cavity round-trip frequency (i.e. in mode-locking regime), stable nanosecond pulses with peak power of ~300 W have been observed both at the 1st (1018 nm) and 2nd (1064 nm) Stokes orders. At that, the beam quality of generated pulses is greatly improved as compared to that for the pump diode (M2>20) reaching M2=2 for the 2nd-order Stokes wave.

Paper Details

Date Published: 19 November 2019
PDF: 7 pages
Proc. SPIE 11181, High-Power Lasers and Applications X, 111810K (19 November 2019); doi: 10.1117/12.2537769
Show Author Affiliations
Alexey G. Kuznetsov, Institute of Automation and Electrometry (Russian Federation)
Ilya N. Nemov, Institute of Automation and Electrometry (Russian Federation)
Alexey A. Wolf, Institute of Automation and Electrometry (Russian Federation)
Novosibirsk State Univ. (Russian Federation)
Sergey I. Kablukov, Institute of Automation and Electrometry (Russian Federation)
Novosibirsk State Univ. (Russian Federation)
Sergey A. Babin, Institute of Automation and Electrometry (Russian Federation)
Novosibirsk State Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 11181:
High-Power Lasers and Applications X
Ruxin Li; Upendra N. Singh; Shibin Jiang, Editor(s)

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