@inproceedings{ab86e55c54a54f0890c62af2cef68864,
title = "Frequency doubling of graded-index fiber Raman lasers with multimode diode pumping",
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.",
keywords = "Beam clean-up, Diode pumping, Fiber laser, Frequency doubling, Graded-index fiber, Raman laser, beam clean-up, graded-index fiber, diode pumping, fiber laser, frequency doubling",
author = "Kuznetsov, {Aleksey G.} and Evmenova, {Ekaterina A.} and Dontsova, {Ekaterina I.} and Kablukov, {Sergey I.} and Babin, {Sergey A.}",
year = "2020",
month = mar,
day = "2",
doi = "10.1117/12.2545836",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Schunemann, {Peter G.} and Schepler, {Kenneth L.}",
booktitle = "Nonlinear Frequency Generation and Conversion",
address = "United States",
note = "Nonlinear Frequency Generation and Conversion: Materials and Devices XIX 2020 ; Conference date: 03-02-2020 Through 05-02-2020",
}