Coherence and focusing properties of unstable resonator semiconductor lasers

Mittelstein, M.; Salzman, J.; Venkatesan, T.; Lang, R.; Yariv, A.
May 1985
Applied Physics Letters;5/15/1985, Vol. 46 Issue 10, p923
Academic Journal
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.


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