Ratner & Prestia
Semiconductor laser and method for producing the same
 A semiconductor laser includes a substrate of a first conductive type, a mesa provided on the substrate and having a multilayered structure including at least a cladding layer of the first conductive type, an active layer and another cladding layer of a second conductive type, a current blocking layer provided on both sides of the mesa, a buried layer of the second conductive type provided on the mesa and the current blocking layer, and a contact layer of the second conductive type provided in a predetermined region on the buried layer. The predetermined region does not include a portion immediately above the mesa. 
Matsushita Electric Industrial Co., Ltd.
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Yoshihiro Kiyoshi
Mori Fujihara