Patent ID: 7839912
Filing Date: 2010-11-23
Classification: H01S

Abstract:
1. A surface emitting laser comprising: a resonator; a first reflector; and a second reflector, wherein the resonator and the first and second reflectors are provided on a substrate, wherein the resonator includes an active region and a current confinement region, wherein the resonator includes a first refractive index region that is located at a central portion of the resonator and a second refractive index region that is located at a peripheral portion of the resonator and that is lower than the first refractive index region in effective refractive index, wherein a resonator length I wherein the first refractive index region is equal in physical length to that of the second refractive index region, and wherein the resonator length I in which N is an integer equal to or larger than two, where λ indicates an oscillation wavelength, n h indicates an effective refractive index of a fundamental mode selection region, and n l indicates an effective refractive index of a high-order mode oscillation suppression region.