| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface emitting laser the threshold current of which does not become large over a wide wavelength band. ! SOLUTION: There is provided a surface emitting layer which has a lower reflector, an active layer, a gap part, and an upper reflector in this order, and varies the wavelength of light to be emitted by varying the distance between the lower reflector and upper reflector. The surface emitting layer has a drive part which displaces one of the lower reflector and upper reflector in the direction of the optical axis of the light to be emitted, and is characterized in that at least one of the lower reflector and upper reflector has a laminate body having a first layer and a second layer, having a smaller refractivity than the first layer, laminated alternately and has first layers at both ends, and a third layer is further provided at least at one of both the ends. ! COPYRIGHT: (C)2015,JPO&INPIT |
