9xx high power pump modules

Susanne Pawlik; Boris Sverdlov; Rainer Bättig; Berthold Schmidt; Hans-Ulrich Pfeiffer; Sebastian Arlt; Norbert Lichtenstein; Jürgen Müller; Jörg Troger; Bernd Valk; Christoph Harder

doi:10.1117/12.646362

15 February 2006 9xx high power pump modules

Susanne Pawlik, Boris Sverdlov, Rainer Bättig, Berthold Schmidt, Hans-Ulrich Pfeiffer, Sebastian Arlt, Norbert Lichtenstein, Jürgen Müller, Jörg Troger, Bernd Valk, Christoph Harder

Author Affiliations +

Proceedings Volume 6104, High-Power Diode Laser Technology and Applications IV; 61040J (2006) https://doi.org/10.1117/12.646362
Event: Lasers and Applications in Science and Engineering, 2006, San Jose, California, United States

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.

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Susanne Pawlik, Boris Sverdlov, Rainer Bättig, Berthold Schmidt, Hans-Ulrich Pfeiffer, Sebastian Arlt, Norbert Lichtenstein, Jürgen Müller, Jörg Troger, Bernd Valk, and Christoph Harder "9xx high power pump modules", Proc. SPIE 6104, High-Power Diode Laser Technology and Applications IV, 61040J (15 February 2006); https://doi.org/10.1117/12.646362

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