Patent ID: 6707835
Filing Date: 2004-03-16
Classification: H01S

Abstract:
A semiconductor laser element comprising:a substrate; a waveguide; a plurality of layers being formed on said substrate and including an active layer, a first cladding layer, and a current stopping layer formed in this order, where said first cladding layer has a first refractive index, said current stopping layer has an opening extending in a laser propagation direction and being located above a center portion of the waveguide, and a pair of parallel grooves extending in said laser propagation direction are formed at positions corresponding to side edges of said opening in the first cladding layer, and filled with a material having a second refractive index higher than said first refractive index; and a second cladding layer formed over said pair of parallel grooves and a portion of said first cladding layer located between the pair of parallel grooves.