Patent ID: 6757311
Filing Date: 2004-06-29
Classification: H01L,H01S

Abstract:
A laser diode comprising:a first clad layer of a first conductivity type formed on a substrate; an active layer formed at an upper layer of said first clad layer; a second clad layer of a second conductivity type formed at an upper layer of said active layer; a third clad layer of the second conductivity type formed at an upper layer of said second clad layer in a current injection stripe region; a contact layer formed at an upper layer of said third clad layer; and an electrode formed so as to connect said second clad layer in regions other than said current injection stripe region and to connect said contact layer; whereby when a first current is injected from said electrode via said contact layer by applying a predetermined voltage to said electrode and laser light is emitted from a laser light oscillation region near said active layer, a second current which is smaller than said first current is injected in regions other than said current injection stripe region from said electrode via said second clad layer and currents at ends of said laser light oscillation region are controlled for self pulsation.