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Proceedings Paper

High-brightness and high-efficiency fiber-coupled module for fiber laser pump with advanced laser diode
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Paper Abstract

High-brightness and high-efficiency fiber-coupled pump module has been developed with newly designed laser diodes and improved spatial optical system. High-power operation was realized by widening laser stripe width. The optical system of the module consists of only spatial multiplexing, not using polarization or wavelength multiplexing technique. Therefore it has advantages that no power loss at a polarization beam combiner or gratings, low material costs of optics, and high excitation efficiency by single wavelength excitation for a fiber laser. The peak power conversion efficiency of the module is 65.6% at 120 W output power, and its efficiency maintains more than 60% up to 220 W at 19 A driving current, and the maximum output power is 252 W at 23 A, at 25 degrees C heat sink temperature. The fiber outside diameter of the module is conventional 125 μm. Center wavelength of the laser is 915 nm.

Paper Details

Date Published: 22 February 2017
PDF: 6 pages
Proc. SPIE 10086, High-Power Diode Laser Technology XV, 1008606 (22 February 2017); doi: 10.1117/12.2252122
Show Author Affiliations
Yohei Kasai, Fujikura Ltd. (Japan)
Yuji Yamagata, Optoenergy Inc. (Japan)
Yoshikazu Kaifuchi, Fujikura Ltd. (Japan)
Akira Sakamoto, Fujikura Ltd. (Japan)
Daiichiro Tanaka, Fujikura Ltd. (Japan)

Published in SPIE Proceedings Vol. 10086:
High-Power Diode Laser Technology XV
Mark S. Zediker, Editor(s)

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