Patent ID: 6256137
Filing Date: 2001-07-03
Classification: G02F,H01S

Abstract:
A wavelength converter for receiving an intensity-modulated signal light having a first wavelength, and outputting a signal light having a second wavelength modulated based on a modulation state of the received signal light, comprising:a first polarizer for separating an input light having the second wavelength into first and second polarized waves normal to each other;one or more waveguides which are provided such that at least one of the first and second polarized waves can pass through, and whose refractive index depends on an intensity of an input light;a coupling device for coupling the first and second polarized waves at least one of which has passed through said waveguide; anda second polarizer for receiving an output light from said coupling device and outputting a signal light having the second wavelength, whereinthe signal light having the first wavelength is input to one of said one or more waveguides.