Patent ID: 8594146
Filing Date: 2013-11-26
Classification: B41J,H01S,H04N

Abstract:
1. A surface emitting laser element which emits light in a direction perpendicular to a surface of a substrate of the surface emitting laser element, comprising: a resonator structural body including an active layer; and first and second semiconductor distributed Bragg reflectors which sandwich the resonator structural body and include a confinement structure which can confine an injection current and a lateral mode of oscillation light at the same time by surrounding a current passing through region with an oxide containing at least an oxide formed by oxidizing a part of a layer to be selectively oxidized containing aluminum; wherein a thickness of the layer to be selectively oxidized is at least 25 nm; and a temperature when an oscillation threshold current becomes a minimum value is 25 ° C. or less in a relationship between the temperature and the oscillation threshold current; and wherein: when a rectangular current pulse whose pulse period is 1 ms and whose pulse width is 500 μs is supplied to the surface emitting laser element, a relationship of (P1−P2)/P2≧−0.1 is satisfied when a light output after 10 ns of the pulse being supplied is defined as P1 and a light output after 1 μs of the pulse being supplied is defined as P2.