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Observation of changes of laser beam characteristics in aged oxide-defined narrow-stripe lasers

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3 Author(s)
Ying Chen ; Perkin-Elmer, Danbury, CT ; Reisinger, A.R. ; Pendse, D.

Aged oxide-defined narrow-stripe lasers sometimes exhibit beam narrowing in both the near-field and far-field light distributions, accompanied by the development of sustained pulsations. The beam narrowing is found to correlate with the presence of a darkened area under the stripe viewed by cathodoluminescence imaging. We propose an explanation based on a thermal waveguiding effect resulting from increasing heat dissipation in the darkened area.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:19 ,  Issue: 6 )