Patent ID: 6383829
Filing Date: 2002-05-07
Classification: B82Y,G02B,H01S

Abstract:
A method of fabricating an optical semiconductor device including an optical waveguide having a thickness varying in a lengthwise direction thereof, comprising the steps of:(a) forming a pair of dielectric masks on a compound semiconductor substrate, said masks including a portion where a width thereof varies in said direction; (b) epitaxially growing a lower optical confinement layer by metal-organic vapor phase epitaxy (MOVPE) selective growth; (c) forming a quantum well structure by epitaxially growing a quantum well layer or a plurality of quantum well layers with barrier layers sandwiched between said quantum well layers by metal-organic vapor phase epitaxy (MOVPE) selective growth; and (d) epitaxially growing an upper optical confinement layer by metal-organic vapor phase epitaxy (MOVPE) selective growth, said quantum well layer or plurality of quantum well layers being grown in said step (c) under a growth pressure lower than that of said lower and upper optical confinement layers in said steps (b) and (d).