@inproceedings{4d1d64d3fc9c4eb38824ac7fb904d508,
title = "Transverse mode selection in diode-pumped multimode fiber Raman lasers",
abstract = "We report on the transverse mode selection in an all-fiber CW Raman laser based on a multimode graded-index fiber directly pumped by multimode laser diodes. Selection properties of special fiber Bragg gratings inscribed by UV CW or IR femtosecond radiation in the 100-μm core of graded-index fiber are experimentally compared. It is also theoretically explained why the better fundamental mode selection occurs in the femtosecond fiber Bragg grating inscribed in the fiber with lower core diameter. Fibers with core diameter of 62.5, 85 and 100 um are compared in the experiment. With core enlargement, the output power and slope efficiency increase sufficiently (from 47% to 84%) at the expense of slight beam-quality parameter increase (M2 =1.3-3).",
keywords = "Beam clean-up, Diode pumping, Fiber Bragg grating, Graded-index fiber, Raman fiber laser, Transverse mode selection., beam clean-up, graded-index fiber, transverse mode selection, fiber Bragg grating, diode pumping",
author = "Zlobina, {Ekaterina A.} and Kablukov, {Sergey I.} and Wolf, {Alexey A.} and Nemov, {Ilya N.} and Dostovalov, {Alexandr V.} and Babin, {Sergey A.}",
year = "2018",
month = jan,
day = "1",
doi = "10.1117/12.2307309",
language = "English",
volume = "10683",
series = "Proceedings of SPIE",
publisher = "SPIE",
editor = "S Taccheo and JI Mackenzie and M Ferrari",
booktitle = "Fiber Lasers and Glass Photonics",
address = "United States",
note = "Fiber Lasers and Glass Photonics: Materials through Applications 2018 ; Conference date: 22-04-2018 Through 26-04-2018",
}