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Proceedings Paper

High power red laser oscillation in Pr3+-doped waterproof fluoro-aluminate glass fiber excited by a GaN laser diode
Author(s): J. Nakanishi; T. Yamada; Y. Fujimoto; O. Ishii; M. Yamazaki
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Paper Abstract

We have demonstrated a high power red fiber laser with a Pr-doped waterproof fluoro-aluminate glass fiber (Pr:WPFGF). When 800 mW pumping power of a blue/violet GaN laser diode (GaN-LD) was launched into the Pr:WPFGF (core diameter 8 μm, length 40 mm) with dielectric coating on both end surfaces to construct a resonator, the maximum output laser power at 638 nm was obtained to be 311.4 mW that is higher than previously reported Pr:ZBLAN fibers. The threshold power was evaluated to be 52.1 mW, and the slope efficiency was calculated to be 41.6%. Assuming the resonator to be a Fabry-Perot resonator, we can calculate the output power to be 336 mW at 800 mW pump power and the slop efficiency to be 44.2%. These theoretical values show good agreement with experimental ones.

Paper Details

Date Published: 3 March 2011
PDF: 6 pages
Proc. SPIE 7912, Solid State Lasers XX: Technology and Devices, 791226 (3 March 2011); doi: 10.1117/12.874437
Show Author Affiliations
J. Nakanishi, NIDEK Co., Ltd. (Japan)
T. Yamada, NIDEK Co., Ltd. (Japan)
Y. Fujimoto, Osaka Univ. (Japan)
O. Ishii, Sumita Optical Glass, Inc. (Japan)
M. Yamazaki, Sumita Optical Glass, Inc. (Japan)

Published in SPIE Proceedings Vol. 7912:
Solid State Lasers XX: Technology and Devices
W. Andrew Clarkson; Norman Hodgson; Ramesh Shori, Editor(s)

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