Proceedings ArticleDOI
20W continuous wave reliable operation of 980nm broad-area single emitter diode lasers with an aperture of 96μm
Paul Crump,Gunnar Blume,Katrin Paschke,R. Staske,A. Pietrzak,Ute Zeimer,Sven Einfeldt,Arnim Ginolas,Frank Bugge,K. Häusler,Peter Ressel,Hans Wenzel,G. Erbert +12 more
Reads0
Chats0
TLDR
In this article, the authors investigated the reliability of a single broad area diode laser diode with stripe widths in the 90-100 μm range and showed that it is possible to operate at 20W per emitter for over 4000 hours without failure, with 60μm stripe devices operating reliably at 10W per stripe.Abstract:
High power broad area diode lasers provide the optical energy for all high performance solid state and fiber laser
systems. The maximum achievable power density from such systems is limited at source by the performance of the diode
lasers. A crucial metric is the reliable continuous wave optical output power from a single broad area laser diode,
typically for stripe widths in the 90-100 μm range, which is especially important for users relying on fibered multi-mode
pumps. We present the results of a study investigating the reliable power limits of such 980nm sources. We find that
96μm stripe single emitters lasers at 20°C operate under continuous wave power of 20W per emitter for over 4000 hours
(to date) without failure, with 60μm stripe devices operating reliably at 10W per stripe. Maximum power testing under
10Hz, 200μs QCW drive conditions shows that 96μm stripes reach 30W and 60μm stripes 21W per emitter, significantly above the reliable operation point. Results are also presented on step-stress-studies, where the current is step-wise increased until failure is observed, in order to clarify the remaining reliability limits. Finally, we detail the barriers to increased peak power and discuss how these can be overcome.read more
Citations
More filters
Journal ArticleDOI
Theoretical and experimental investigations of the limits to the maximum output power of laser diodes
TL;DR: In this article, the authors investigated the factors that limit both the continuous wave (CW) and the pulsed output power of broad-area laser diodes driven at very high currents and showed that the decrease in the gain due to self-heating under CW operation and spectral hole burning under pulsed operation, as well as heterobarrier carrier leakage and longitudinal spatial hole burning, are the dominant mechanisms limiting the maximum achievable output power.
Journal ArticleDOI
Nanofabrication of III?V semiconductors employing diblock copolymer lithography
Thomas F. Kuech,Luke J. Mawst +1 more
TL;DR: In this article, a pattern consisting of perpendicularly ordered cylindrical domain formed as part of a self-organizing diblock copolymer, such as polystyrene block poly(methylmethacrylate) (PS-b-PMMA), is described.
Journal ArticleDOI
Diode laser based light sources for biomedical applications
André Müller,Sebastian Marschall,Ole B. Jensen,Jörg Fricke,Hans Wenzel,Bernd Sumpf,Peter Andersen +6 more
TL;DR: An overview of the latest development of diode laser technology and systems and their use within selected biomedical applications is provided in this paper, where the external cavity diode was used for Raman spectroscopy built on a 13 × 4 mm2 microbench.
Journal ArticleDOI
The analysis of factors limiting the maximum output power of broad-area laser diodes
TL;DR: In this article, the authors investigated the causes for saturation of both the continuous-wave and the pulsed output power of broad-area laser diodes driven at very high currents.
Proceedings ArticleDOI
Progress in increasing the maximum achievable output power of broad area diode lasers
TL;DR: In this article, the authors present theoretical and experimental diagnostic studies at the Ferdinand-Braun-Institut have helped trace the saturation effects to three main effects: gain saturation, longitudinal-hole burning, and current driven carrier leakage.