4-LIGHT-WAVE MIXED LIGHT GENERATING CIRCUIT AND OPTICAL CIRCUIT USING SAME

摘要

PROBLEM TO BE SOLVED: To provide the 4-light-wave mixed light generating circuit which can separate and extract 4-light-wave mixed light (wavelength converted light and phase conjugate light) from signal light and exciting light without using a wavelength demultiplexing means such as a wavelength film and the optical circuit which uses it. SOLUTION: A ports 3 of a 2×2 optical branching and coupling unit and an optical nonlinear medium are connected by a dispersive medium which has a specific length and a specific propagation constant and a port 4 and the optical nonlinear medium are connected by a dispersive medium which has a specific length and a specific propagation constant; and the signal light S (carrier angular frequencyωs ) and exciting lights P1 and P2 (carrier angular frequenciesωp1 andωp2 ) are made incident from a port 1 of the optical branching and coupling unit 20 and the 4-light-wave mixed light (carrier angular frequencyωf =ωp1 +ωp2 -ωS) generated by the optical nonlinear medium is led out of a port 2.