Patent ID: 6055087
Filing Date: 2000-04-25
Classification: G02F

Abstract:
A photo-induced electro-optic oscillator comprising:a semi-insulating compound semiconductor substrate;an edge-emitting semiconductor laser diode formed on said semiconductor substrate, for emitting laterally a laser light of an excitation absorption wavelength band with a constant intensity, the excitation absorption wavelength band having a maximum optical absorption; anda waveguide PIN diode which is formed such that an optical active layer on the semiconductor substrate can receive said laser light, the waveguide PIN diode generating an optical signal modulated by a frequency identical to an electrical oscillation frequency when a photocurrent-voltage relation has a negative resistance characteristic due to said laser light emitted from said edge-emitting semiconductor laser diode, the optical signal being modulated by changing an absorption ratio of the constantly incident optical signal, the absorption ratio being changed by electrically oscillating said optical active layer, said optical active layer being oscillated by applying a D.C. voltage to a negative resistance voltage region.