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Proceedings Paper

High power (110W), high efficiency (55%) monolithic FBG based fiber laser operating at 2&mgr;m
Author(s): G. P. Frith; B. Samson; A. Carter; J. Farroni; K. Tankala
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Paper Abstract

We report a fiber Bragg grating (FBG) based laser, delivering 110W CW at 2&mgr;m with 55% slope efficiency from a conductively cooled Tm-doped silica fiber pumped with 200W of 793nm radiation. The laser operates in a single transverse mode at 2050nm (FWHM ~2nm) independent of the operating power; as determined by the peak reflectivity of the FBG. This demonstration has been made possible by the recent development of true large mode area (LMA) Tm-doped fibers which employ the use of an up-doped pedestal surrounding the rare earth doped core. High reflectivity fiber gratings were written in a matching photosensitive fiber, spliced to the Tm-doped LMA fiber and an end pumped monolithic laser cavity demonstrated.

Paper Details

Date Published:
PDF: 2 pages
Proc. SPIE 6453, Fiber Lasers IV: Technology, Systems, and Applications, 64532B; doi: 10.1117/12.729605
Show Author Affiliations
G. P. Frith, Nufern (United States)
B. Samson, Nufern (United States)
A. Carter, Nufern (United States)
J. Farroni, Nufern (United States)
K. Tankala, Nufern (United States)


Published in SPIE Proceedings Vol. 6453:
Fiber Lasers IV: Technology, Systems, and Applications
Donald J. Harter; Andreas Tünnermann; Jes Broeng; Clifford Headley, Editor(s)

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