| 摘要 |
PROBLEM TO BE SOLVED: To provide a mesa-structure surface emitting laser having a current constriction structure, which inhibits increase in value of oscillation threshold current even when an off substrate and a surface relief structure are used.SOLUTION: A surface emitting laser having a mesa structure comprises: an off substrate; a lower reflection mirror; an active layer; a current constriction structure; an upper reflection mirror; and a surface relief structure. A central axis of a high reflectance region of the surface relief structure and a central axis of the mesa structure are not coincident with each other and a value of oscillation threshold current is lower than when the central axis of the high reflectance region of the surface relief structure and the central axis of the mesa structure are coincident with each other. |
