$400~\mathrm{\mu} \mathrm{m} $ stripe lasers for high-power fiber coupled pump modules
| Autor: | René Platz, Götz Erbert, Wolfgang Pittroff, Moritz Malchus, Klaus Vogel, Günther Tränkle |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | High Power Laser Science and Engineering, Vol 1, Pp 60-67 (2013) |
| Druh dokumentu: | article |
| ISSN: | 2095-4719 2052-3289 |
| DOI: | 10.1017/hpl.2012.1 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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