stripe lasers for high-power fiber coupled pump modules

We present a 940 nm quasi-continuous wave semiconductor laser designed as a building block for high-power fiber coupled pump modules. The laser comprises a $400~\mathrm{\mu} \mathrm{m} $ narrow-stripe array mounted on an aluminum nitride substrate using hard solder. The chip has been optimized for h...

Full description

Saved in:
Bibliographic Details
Published in:High power laser science and engineering 2013-03, Vol.1 (1), p.60-67
Main Authors: Platz, René, Erbert, Götz, Pittroff, Wolfgang, Malchus, Moritz, Vogel, Klaus, Tränkle, Günther
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present a 940 nm quasi-continuous wave semiconductor laser designed as a building block for high-power fiber coupled pump modules. The laser comprises a $400~\mathrm{\mu} \mathrm{m} $ narrow-stripe array mounted on an aluminum nitride substrate using hard solder. The chip has been optimized for high optical power and low lateral far-field angles. Two vertical and six lateral structure variations have been investigated to determine the best achievable performance. Operating at 1 ms pulse width and a repetition rate of 10 Hz, the laser device reaches a maximum pulse power of 86 W from a $400~\mathrm{\mu} \mathrm{m} $ aperture and more than 62% maximum conversion efficiency. Low lateral far-field angles (95% power enclosed) of 11.5° and 13.5°, depending on the epitaxial design, enable efficient multimode fiber coupling. The potential for highly reliable applications has been demonstrated.
ISSN:2095-4719
2052-3289
DOI:10.1017/hpl.2012.1