Patent ID: 6512783
Filing Date: 2003-01-28
Classification: B82Y,H01S

Abstract:
A semiconductor laser comprising:a first cladding layer formed of compound semiconductor including first conductivity type impurity and having a mesa-shaped projection; an active layer formed on the projection like a stripe, and having side surfaces inclined at an angle of more than 70 degrees but less than 90 degrees relative to an upper surface of the first cladding layer; buried layers including second conductivity type impurity which is different from the first conductivity type impurity formed on both sides of the projection; current blocking layers each having one end which contacts a virtual surface obtained by extending upward a side surface of the active layer and having a first facet which extends downward from the one end and is inclined by about 55 degrees relative to the upper surface of the first cladding layer, each of the current blocking layers having another facet which contacts the one end and is inclined upward from the one end so as to spread to a lateral side of the active layer from the one end, and the blocking layers including the first conductivity type impurity formed on each buried layer; and a second cladding layer including the second conductivity type impurity formed on the current blocking layers and the active layer.