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Published July 25, 1988 | public
Journal Article Open

Spectral and dynamic characteristics of buried-heterostructure single quantum well (Al,Ga)As lasers


We demonstrate that, as predicted, (Al,Ga)As single quantum well (SQW) lasers have substantially narrower spectral linewidths than bulk double-heterostructure lasers. We have observed a further major reduction (>3×) in the linewidth of these SQW lasers when the facet reflectivities are enhanced. This observation is explained theoretically on the basis of the very low losses in coated SQW lasers and the value of the spontaneous emission factor at low threshold currents. We also report on the modulation frequency response parameter of these SQW lasers.

Additional Information

Copyright © 1988 American Institute of Physics. (Received 21 March 1988; accepted 17 May 1988) This work was supported by the National Science Foundation, the Office of Naval Research, and the Air Force Office of Scientific Research. The authors would like to acknowledge discussions with N. Bar-Chaim of Ortel Corporation. One author (M.M.) gratefully acknowledges support from a Newport Research Award.


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