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Proceedings Paper

Frequency doubling of graded-index fiber Raman lasers with multimode diode pumping
Author(s): Aleksey G. Kuznetsov; Ekaterina A. Evmenova; Ekaterina I. Dontsova; Sergey I. Kablukov; Sergey A. Babin
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Paper Abstract

Graded-index fibers with special in-fiber Bragg gratings are shown to convert efficiently highly multimode (M2 ~30) laser diode pump radiation in all-fiber Raman laser configuration into a high-quality Stokes beam at 954 and 976 nm (M2 =1.6-2.6 in different configurations). The beam quality improvement is provided by well-known Raman beam cleanup effect defined by Raman gain profile, and additional impact of transverse mode-selective properties of cavity feedback provided by special femtosecond-pulse inscribed fiber Bragg gratings and/or random Rayleigh backscattering distributed along the fiber. Here we study frequency doubling of the diode-pumped Raman fiber laser in a simple singlepass scheme with 5-mm PPLN crystal demonstrating efficient second harmonics generation at 477 and 488 nm with high beam quality after elimination of interfering effects.

Paper Details

Date Published: 2 March 2020
PDF: 7 pages
Proc. SPIE 11264, Nonlinear Frequency Generation and Conversion: Materials and Devices XIX, 112641J (2 March 2020); doi: 10.1117/12.2545836
Show Author Affiliations
Aleksey G. Kuznetsov, Institute of Automation and Electrometry of the SB RAS (Russian Federation)
Ekaterina A. Evmenova, Institute of Automation and Electrometry of the SB RAS (Russian Federation)
Ekaterina I. Dontsova, Institute of Automation and Electrometry of the SB RAS (Russian Federation)
Sergey I. Kablukov, Institute of Automation and Electrometry of the SB RAS (Russian Federation)
Novosibirsk State Univ. (Russian Federation)
Sergey A. Babin, Institute of Automation and Electrometry of the SB RAS (Russian Federation)
Novosibirsk State Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 11264:
Nonlinear Frequency Generation and Conversion: Materials and Devices XIX
Peter G. Schunemann; Kenneth L. Schepler, Editor(s)

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