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Proceedings Paper

9xx high power pump modules
Author(s): Susanne Pawlik; Boris Sverdlov; Rainer Bättig; Berthold Schmidt; Hans-Ulrich Pfeiffer; Sebastian Arlt; Norbert Lichtenstein; Jürgen Müller; Jörg Troger; Bernd Valk; Christoph Harder
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Paper Abstract

In this communication we present the characteristics of Bookham's MU7-9xx-01 laser module with multimode fiber output. This latest generation of our multimode modules is designed for light output power of up to 7 W in uncooled operation in the wavelength range between 915 nm and 975 nm. The key element of the module is our new SES8-9xx-01 broad area single emitter. These high power lasers in the 9xx nm wavelength range show a high slope efficiency of up to 1.2 W/A in CW room temperature operation. High efficiency combined with low threshold current and low operation voltage result in a maximum wall plug efficiency of above 65%. Almost 4000 h lifetest data at accelerated conditions are available for the laser diodes. The data give estimated reliability values of below 5 kFIT at operating conditions (between 8 A and 8.5 A injection current at up to 35°C heat sink temperature). The robustness of the new lasers is also illustrated by the fact that no catastrophic mirror damage was observed up to 22.5 W of light output power. The low divergence of the laser beam allows coupling into multimode fiber with 0.15 or 0.22 numerical aperture (NA) with a coupling efficiency above 90% at operation condition. Maximum ex-fiber light output powers of 11.5 W are shown. On module level around 2000 h lifetest data are accumulated without any failure or sign of degradation.

Paper Details

Date Published: 15 February 2006
PDF: 8 pages
Proc. SPIE 6104, High-Power Diode Laser Technology and Applications IV, 61040J (15 February 2006); doi: 10.1117/12.646362
Show Author Affiliations
Susanne Pawlik, Bookham AG (Switzerland)
Boris Sverdlov, Bookham AG (Switzerland)
Rainer Bättig, Bookham AG (Switzerland)
Berthold Schmidt, Bookham AG (Switzerland)
Hans-Ulrich Pfeiffer, Bookham AG (Switzerland)
Sebastian Arlt, Bookham AG (Switzerland)
Norbert Lichtenstein, Bookham AG (Switzerland)
Jürgen Müller, Bookham AG (Switzerland)
Jörg Troger, Bookham AG (Switzerland)
Bernd Valk, Bookham AG (Switzerland)
Christoph Harder, Bookham AG (Switzerland)

Published in SPIE Proceedings Vol. 6104:
High-Power Diode Laser Technology and Applications IV
Mark S. Zediker, Editor(s)

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