Thermal waveguiding in oxide-defined, narrow-stripe, large-optical-cavity lasers

The characteristics of oxide-defined, narrow-stripe large-optical-cavity (LOC) AlGaAs lasers are described. Compared with regular narrow-stripe double heterostructure (DH) lasers, the LOC version exhibits more narrowing of the near-field and far-field distributions, higher astigmatism, higher differ...

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Published in:Applied physics letters 1982-07, Vol.41 (2), p.129-131
Main Authors: Chen, Y. C., Reisinger, A. R., Chinn, S. R.
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Language:English
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cited_by cdi_FETCH-LOGICAL-c250t-3a8633c486e9ff5d0b25eea129cc6f927fb411941cb7312e418bc1555f6ac7db3
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description The characteristics of oxide-defined, narrow-stripe large-optical-cavity (LOC) AlGaAs lasers are described. Compared with regular narrow-stripe double heterostructure (DH) lasers, the LOC version exhibits more narrowing of the near-field and far-field distributions, higher astigmatism, higher differential quantum efficiency, and higher incidence of sustained pulsations. We have found that these phenomena can be explained in terms of the formation of a thermal waveguide. There is often a striking similarity in characteristics of narrow-stripe LOC and degraded narrow- stripe DH lasers. We suggest that a thermal waveguiding effect is an important factor in determining the behavior of degraded semiconductor lasers.
doi_str_mv 10.1063/1.93426
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title Thermal waveguiding in oxide-defined, narrow-stripe, large-optical-cavity lasers
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