Matsushita Electric Industrial Co., Ltd.

Toshiyuki Tarizawa

Toyoji Chino

A striped region with a convex cross section is formed as a laser resonant cavity on an n-type InP substrate. The lower part of the striped region includes an n-type InP cladding layer and an n-type InGaAsP first waveguide layer, which are stacked in this order on the substrate. The upper part of the striped region includes an InGaAsP active layer, a p-type InGaAsP second waveguide layer and a p-type InP cladding layer, which are stacked in this order on the first waveguide layer. The striped region extends along the zone axis, or in the &lsqb;011&rsqb; direction. The sides of the upper striped region have a crystallographic plane orientation (0-11), while the sides of the lower striped region have a crystallographic plane orientation (1-11)B.

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Osaka, Japan

Toshiyuki Tarizawa