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Proceedings Paper

Recent advances in Al-free 980-nm pump lasers
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Paper Abstract

This paper describes state-of-the-art aluminum-free 980-nm laser diodes which are intended for pumping erbium doped optical fiber amplifiers (EDFA's). There are three principal issues for these laser diodes to be considered for the EDFA applications: light output power, efficiency of coupling the power into a fiber, and reliability. It has been shown that the lasers can launch 400 mW in single transverse mode of operation into free space. A coupling efficiency of 53% and a fiber-coupled power of 58 mW have been demonstrated. Because the Al-free 980-nm lasers are new, their lifetimes have not yet been thoroughly studied. However, some tentative experiments indicate that extrapolated lifetimes may be several hundred thousand hours at reasonable power levels. Thermal roll-over tests prove that the lasers withstand high currents and temperatures without any sign of degradation.

Paper Details

Date Published: 5 August 1994
PDF: 5 pages
Proc. SPIE 2321, Second International Conference on Optoelectronic Science and Engineering '94, (5 August 1994); doi: 10.1117/12.182188
Show Author Affiliations
Markus Pessa, Tampere Univ. of Technology (Finland)
Jari T. Nappi, Tampere Univ. of Technology (Finland)
Alexander Ovtchinnikov, Tampere Univ. of Technology (Finland)
Guodong Zhang, Tampere Univ. of Technology (Finland)
Pekka Savolainen, Tampere Univ. of Technology (Finland)
Harry M. Asonen, Tampere Univ. of Technology (Finland)


Published in SPIE Proceedings Vol. 2321:
Second International Conference on Optoelectronic Science and Engineering '94

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