Patent ID: 8374205
Filing Date: 2013-02-12
Classification: B82Y,H01S

Abstract:
1. A vertical cavity surface emitting laser that includes a plurality of semiconductor layers laminated on a substrate, the layers including a lower multilayer reflecting mirror, an upper multilayer reflecting mirror, and a first active layer arranged between the mirrors, and that oscillates at a wavelength λ 1 , wherein a resonator is formed by the upper multilayer reflecting mirror and the lower multilayer reflecting mirror, the resonator has a structure that generates longitudinal multimode including: a first longitudinal mode in which a resonant wavelength is λ a second longitudinal mode in which the resonant wavelength is λ a third longitudinal mode that is different from the second longitudinal mode in which the resonant wavelength is λ the first active layer is arranged at a position shifted from a standing wave loop of the first longitudinal mode formed in the resonator, oscillation of the second longitudinal mode with a large gain of the first active layer among the first to third longitudinal modes is suppressed, and single longitudinal mode oscillation based on the first longitudinal mode is allowed.