Distributed feedback surface emitting laser

摘要

A photonic crystal surface emitting laser array reduces the occurrence of reflected feedback light while also reducing input of leaking light. The photonic crystal surface emitting laser array includes a plurality of first photonic crystal regions that cause laser oscillation, a second photonic crystal region that causes light diffraction to occur in an out-of-plane direction, and a light absorber that is provided above the second photonic crystal region and that absorbs light having a wavelength λ. A radiation coefficient of each first photonic crystal region is smaller than a radiation coefficient of the second photonic crystal region.

主权项

1. A surface emitting laser array comprising:
a plurality of first photonic crystals; a second photonic crystal arranged between the first photonic crystals; an active layer corresponding to the first photonic crystals; a first electrode corresponding to one of first photonic crystals; a second electrode corresponding to another of first photonic crystals and being different from the first electrode; and a light absorber on the second photonic crystal and absorbing light of a wavelength λ, wherein the first photonic crystals are arranged in an in-plane direction of the active layer, wherein a first electrode and a second electrode are arranged in the in-plane direction, wherein each of the first photonic crystals serves as a cavity of the wavelength λ in the in-plane direction, wherein the second photonic crystal causes light diffraction in an out-of-plane direction of the active layer, wherein the light absorber absorbs light which includes the light of the wavelength and which is caused light diffraction by the second photonic crystal.