Catastrophic Optical Damage Generation Mechanism in (AlGa)As DH Lasers

Under high optical power operation, (AlGa)As DH lasers suffer from catastrophic optical damage (COD). When the COD occurs dark line defects are observed in the bulk crystal, as well as in mirror surface damage. The COD generation mechanism is clarified by TEM observation of the defects associated wi...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1980-01, Vol.19 (S1), p.425
Main Authors: Kamejima, Taibun, Yonezu, Hiroo
Format: Article
Language:English
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Summary:Under high optical power operation, (AlGa)As DH lasers suffer from catastrophic optical damage (COD). When the COD occurs dark line defects are observed in the bulk crystal, as well as in mirror surface damage. The COD generation mechanism is clarified by TEM observation of the defects associated with the COD and by investigation on transient behaviors of lasing light excited by one-shot-pulse. It is confirmed that such defects are generated by local overheating up to the melting point of GaAs due to the thermal positive feed back and following transfer of molten zone.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAPS.19S1.425