Wavelength tunable surface emitting laser and optical coherence tomography apparatus including the same

摘要: A surface emitting laser includes a lower reflector, an active layer, gap portion, upper and driving unit. The the reflector are arranged in that order. is capable of varying wavelength emitted light by changing distance between reflectors. unit moves one reflectors optical axis direction light. At least stacked body which first layers second alternately stacked, having refractive index than layers, outermost being third layer provided on at end body.