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Proceedings Paper

Advances in power-delivery and loss-handling capabilities of small connectors for fibre optic launching of high-power diode lasers
Author(s): Stuart Campbell; Ola Blomster; Magnus Pålsson; Armin Segref; Bernd Köhler; Jens Biesenbach
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Paper Abstract

Constant advancement in laser sources leads to commercial and industrial lasers with ever higher output powers and brilliance. The increasing capabilities of diode laser sources in particular produces extreme challenges for fibre launching. The difficulties arise due to the nature of the diode lasers, which are often designed with a numerical aperture (NA) exceeding the optical fibre’s NA and a spot size overfilling the fibre core so as to maintain the best possible brilliance. In addition to these properties, the spot imaged onto the fibre facet is typically rectangular. The combination of these properties result in an imperfect launch efficiency, forcing the connector built around the optical-fibre to cope with the radiation which is “lost” from the core of the fibre. Improvements in the Optoskand SMAQ connector are discussed, along with the presentation of results showing the increased power- and loss- handling capabilities when used with a variety of diode laser sources at 976nm. The sources used in the tests are optimised for an optical-fibre of core diameter (Ø) 200μm and NA of 0.22. The sources range in maximum power from 150W to 1000W with a coupling efficiency of between 80 and 90%. Additional complimentary results are shown for a Ø=400μm fibre guiding light of NA=0.12 where launch efficiency is 90 to 95%.

Paper Details

Date Published: 26 February 2013
PDF: 10 pages
Proc. SPIE 8605, High-Power Diode Laser Technology and Applications XI, 860502 (26 February 2013); doi: 10.1117/12.2001597
Show Author Affiliations
Stuart Campbell, Optoskand AB (Sweden)
Ola Blomster, Optoskand AB (Sweden)
Magnus Pålsson, Optoskand AB (Sweden)
Armin Segref, DILAS Diodenlaser GmbH (Germany)
Bernd Köhler, DILAS Diodenlaser GmbH (Germany)
Jens Biesenbach, DILAS Diodenlaser GmbH (Germany)

Published in SPIE Proceedings Vol. 8605:
High-Power Diode Laser Technology and Applications XI
Mark S. Zediker, Editor(s)

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