| 摘要 |
PROBLEM TO BE SOLVED: To provide an easily manufacturable semiconductor light emitting element capable of improving light emitting efficiency, reducing an operation current, and improving the reliability of the element and an optical pickup device and an optical recording and/or reproducing device using such a semiconductor light emitting element as a light source. SOLUTION: In an AlGaInP system semiconductor laser, on an (n) type GaAs substrate 1, an (n) type (Alx1 Ga1-x1 )1-y1 Iny1 P clad layer 2 provided with the lattice inconsistency of more than 2.0×10<-4> and less than 3.0×10<-3> to the (n) type GaAs substrate 1, an (Alx2 Ga1-x2 )1-y2 Iny2 P optical waveguide layer 3, the active layer 4 of an MQW structure composed of a Ga1-z Inz P quantum well layer and an (Alx2 Ga1-x2 )1-y2 Iny2 P barrier layer, the (Alx2 Ga1-x2 )1-y2 Iny2 P optical waveguide layer 5 and a (p) type (Alx1 Ga1-x1 )1-y1 Iny1 P clad layer 6 are successively laminated and provided.
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