Patent ID: 6982823

Claim:
A wavelength converter for generating output signal light in correspondence with input signal light, the input signal light having a first wavelength, and the output signal light having a second wavelength and carrying the same information as the input signal light, the wavelength converter comprising: an optical pump source for outputting optical pump light having a third wavelength; and a resonator comprising an optical fiber and a first and second reflecting means, the first and second reflecting means being disposed on both sides of the optical fiber; wherein the input signal light is introduced into the resonator from the first reflecting means, and due to Raman scattering phenomenon, the optical pump light generates light having a fourth wavelength that is different from the third wavelength of the optical pump light and resonating in the optical fiber between the first and second reflecting means, and the output signal light is generated by a nonlinear optical phenomenon between the generated light having the fourth wavelength and the input signal light and is output from the second reflecting means.