Coherence and focusing properties of unstable resonator semiconductor lasers

The emission characteristics of unstable resonator semiconductor lasers were measured. The output of an 80-μm-wide laser consists of a diverging beam with a virtual source 5 μm wide located 50 μm behind the laser facet. A high degree of spatial coherence of the laser output was measured, indicating...

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Bibliographic Details
Published in:Applied physics letters 1985-05, Vol.46 (10), p.923-925
Main Authors: MITTELSTEIN, M, SALZMAN, J, VENKATESAN, T, LANG, R, YARIV, A
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lasers
Optics
Physics
Semiconductor lasers
laser diodes
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Summary:The emission characteristics of unstable resonator semiconductor lasers were measured. The output of an 80-μm-wide laser consists of a diverging beam with a virtual source 5 μm wide located 50 μm behind the laser facet. A high degree of spatial coherence of the laser output was measured, indicating single lateral mode operation for currents I≲3 Ith.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.95822