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Proceedings Paper

Pulsed operation of (Al,Ga,In)N blue laser diodes
Author(s): Amber C. Abare; Michael P. Mack; Mark W. Hansen; R. Kehl Sink; Peter Kozodoy; Sarah L. Keller; Evelyn L. Hu; James S. Speck; John Edward Bowers; Umesh K. Mishra; Larry A. Coldren; Steven P. DenBaars
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Paper Abstract

Room temperature (RT) pulsed operation of blue (420 nm) nitride based multi-quantum well (MQW) laser diodes grown on a-plane and c-plane sapphire substrates has been demonstrated. A combination of atmospheric and low pressure metal organic chemical vapor deposition (MOCVD) using a modified two-flow horizontal reactor was employed. The emission is strongly TE polarized and has a sharp transition in the far field pattern above threshold. Threshold current densities as low as 12.6 kA/cm2 were observed for 10 X 1200 micrometer lasers with uncoated reactive ion etched (RIE) facets on c-plane sapphire. Cleaved facet lasers were also demonstrated with similar performance on a-plane sapphire. Differential efficiencies as high as 7% and output powers up to 77 mW were observed. Laser diodes tested under pulsed conditions operated up to 6 hours at room temperature. Performance was limited by resistive heating during the electrical pulses. Lasing was achieved up to 95 degrees Celsius and up to a 150 ns pulse length (RT). Threshold current increased with temperature with a characteristic temperature, T0, of 125 K.

Paper Details

Date Published: 7 April 1998
PDF: 10 pages
Proc. SPIE 3284, In-Plane Semiconductor Lasers: from Ultraviolet to Mid-Infrared II, (7 April 1998); doi: 10.1117/12.304436
Show Author Affiliations
Amber C. Abare, Univ. of California/Santa Barbara (United States)
Michael P. Mack, Air Force Research Lab. (United States)
Mark W. Hansen, Univ. of California/Santa Barbara (United States)
R. Kehl Sink, Univ. of California/Santa Barbara (United States)
Peter Kozodoy, Univ. of California/Santa Barbara (United States)
Sarah L. Keller, Univ. of California/Santa Barbara (United States)
Evelyn L. Hu, Univ. of California/Santa Barbara (United States)
James S. Speck, Univ. of California/Santa Barbara (United States)
John Edward Bowers, Univ. of California/Santa Barbara (United States)
Umesh K. Mishra, Univ. of California/Santa Barbara (United States)
Larry A. Coldren, Univ. of California/Santa Barbara (United States)
Steven P. DenBaars, Univ. of California/Santa Barbara (United States)


Published in SPIE Proceedings Vol. 3284:
In-Plane Semiconductor Lasers: from Ultraviolet to Mid-Infrared II
Hong K. Choi; Peter S. Zory, Editor(s)

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