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Proceedings Paper

High-brightness 1040-nm tapered diode lasers
Author(s): Marc T. Kelemen; Juergen Weber; Franz Rinner; Joseph Rogg; Michael Mikulla; Guenter Weimann
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Paper Abstract

Semiconductor lasers with high beam quality and high optical output power are very attractive for a variety of applications such as optical pumping of solid-state lasers, fiber amplifiers and medical treatment. When easy and low-cost fabrication is a further requirement, devices based on tapered gain sections are the most promising candidates. Low modal gain, single quantum well InGaAs/A1GaAs devices emitting at 1040 nm were grown by molecular beam epitaxy. The lateral design consists of a tapered gain guided and a ridge-waveguide section having an overall length of mm. An output power of more than 11 W in qcw mode, lifetimes of more than 20,000 h and a record value for the beam quality factor M2of less than 1.5 up to a cw output power of 3.5 W are achieved resulting in an improved brightness of more than 255 MW/(cm2sr). In addition an external-cavity diode laser including a ridge-waveguide tapered amplifier structure is demonstrated to emit more than 2 W cw. The wavelength is tunable over a 60 nm range centered at 1020 nm. The beam quality parameter M2 remains below 1.4 for output powers of 1 W over the whole range demonstrating the nearly diffraction limited behavior.

Paper Details

Date Published: 11 March 2003
PDF: 9 pages
Proc. SPIE 4947, Laser Diodes, Optoelectronic Devices, and Heterogenous Integration, (11 March 2003); doi: 10.1117/12.468634
Show Author Affiliations
Marc T. Kelemen, Fraunhofer-Institut fuer Angewandte Festkörperphysik (Germany)
Juergen Weber, Fraunhofer-Institut fuer Angewandte Festkörperphysik (Germany)
Franz Rinner, Fraunhofer-Institut fuer Angewandte Festkörperphysik (Germany)
Joseph Rogg, Fraunhofer-Institut fuer Angewandte Festkörperphysik (Germany)
Michael Mikulla, Fraunhofer-Institut fuer Angewandte Festkörperphysik (Germany)
Guenter Weimann, Fraunhofer-Institut fuer Angewandte Festkörperphysik (Germany)

Published in SPIE Proceedings Vol. 4947:
Laser Diodes, Optoelectronic Devices, and Heterogenous Integration
John Gerard McInerney; Alfred Driessen; Roel G. Baets; Ephraim Suhir, Editor(s)

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