Self-pulsating semiconductor laser

摘要

PROBLEM TO BE SOLVED: To solve a problem that an element service life of a conventional self-oscillation semiconductor laser is short.;SOLUTION: A nitride light-emitting element comprises: an active layer constituted of a group III nitride semiconductor, a functional layer provided higher than the active layer and including a current constriction or light distribution control function, and an absorption layer provided higher than the functional layer for absorbing light generated in the active layer. The functional layer and the absorption layer include stripe openings. When a transition density in the area of the active layer facing the functional layer is defined as Na, a transition density of the area of the active layer facing the openings is defined as Nb, and a transition density of the area of the absorption layer facing the functional layer is defined as Nc, NaNc and NbNc are established.;COPYRIGHT: (C)2007,JPO&INPIT