Patent ID: 6643307
Filing Date: 2003-11-04
Classification: B82Y,H01S

Abstract:
A semiconductor laser device comprising:an active layer; a first cladding layer, which is formed on the active layer and is made of (AlX1Ga1âˆ’X1)Z1In1âˆ’Z1P(where 0&lE;X1&lE;1 and 01&lE;1) of a first conductivity type; a striped region provided on the first cladding layer; a current blocking layer, which is formed on both sides of the striped region, provided on the first cladding layer and is made of (AlYGa1âˆ’Y)Z2In1âˆ’Z2P (where 0&lE;Y&lE;1 and 02<1) of a second conductivity type; and a second cladding layer, which is formed at least in the striped region and is made of (AlX2Ga1âˆ’X2)Z3In1âˆ’Z3P (where 0&lE;X2&lE;1 and 03<1) of a first conductivity type, wherein X1, X2 and Y have relationships represented as Y>X1 and Y>X2, wherein a laser light is produced from a region in a lower portion of the striped region in the active layer, and a saturable absorption region at the active layer for absorbing laser light produced from the active layer is provided directly below the current blocking layer in the active layer, and is provided beside and in contact with the region, which produces the laser light, in the active layer.