Patent ID: 7391800

Claim:
A vertical cavity surface-emitting semiconductor laser device including a first semiconductor multilayer film reflector, a first resonator, a second semiconductor multilayer film reflector, a second resonator, and a third semiconductor multilayer film reflector which are provided on a substrate, the vertical cavity surface-emitting semiconductor laser device comprising: an active layer provided in one of the first resonator and the second resonator; an optical absorption layer provided in the other of the first resonator and the second resonator; a current introducing unit introducing a current to the active layer; and an electric field applying unit applying an electric field to the optical absorption layer, wherein first and second resonance wavelengths are emitted while the first resonator and the second resonator are coupled optically, the first resonance wavelength being shorter than the second resonance wavelength, and wherein a gain of the active layer at the first resonance wavelength is higher than that at the second resonance wavelength, wherein an absorption coefficient of the optical absorption layer when no electric field is applied is small for the first and second resonance wavelengths, and when an electric field is applied, an absorption coefficient of the optical absorption layer for the first resonance wavelength is larger than that for the second resonance wavelength.