Generating high-quality beam in a multimode LD-pumped all-fiber Raman laser

We report on the first demonstration of an all-fiber CW Raman laser based on a multimode graded-index fiber directly pumped by multimode fiber-coupled laser diodes. A joint action of Raman clean-up effect and mode-selection properties of special fiber Bragg gratings inscribed in the central part of...

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Bibliographic Details
Published in:	Optics express Vol. 25; no. 11; pp. 12581 - 12587
Main Authors:	Zlobina, Ekaterina A, Kablukov, Sergey I, Wolf, Alexey A, Nemov, Ilya N, Dostovalov, Alexander V, Tyrtyshnyy, Valentin A, Myasnikov, Daniil V, Babin, Sergey A
Format:	Journal Article
Language:	English
Published:	United States 29-05-2017
Online Access:	Get full text
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Summary:	We report on the first demonstration of an all-fiber CW Raman laser based on a multimode graded-index fiber directly pumped by multimode fiber-coupled laser diodes. A joint action of Raman clean-up effect and mode-selection properties of special fiber Bragg gratings inscribed in the central part of the graded-index fiber core, results in high-efficiency conversion of a multimode (M ~26) pump at 915 nm into a high-quality (M ~2.6) output beam at 954 nm. About 50 W output power has been obtained with slope efficiency of 67%. The proposed development and integration of key multimode fiber technologies opens the door to new type of LD-pumped high-power high-beam-quality fiber lasers that may operate at almost any wavelength defined by available LDs.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1094-4087 1094-4087
DOI:	10.1364/OE.25.012581