Patent ID: 7327768
Filing Date: 2008-02-05
Classification: G02F

Abstract:
1. A wavelength conversion module comprising: a semiconductor laser module operating in a multi-longitudinal mode to generate light having a plurality of wavelengths; an external resonator coupled to the semiconductor laser module to output light having a plurality of resonant wavelengths; a first optical fiber coupled to the external resonator to propagate the light having the resonant wavelengths; a Sum-Frequency Generation (SFG) wavelength conversion device coupled to the first optical fiber to output light having a wavelength at a sum frequency of the resonant wavelengths; a second optical fiber coupled to the SFG wavelength conversion device to propagate the light having the wavelength at the sum frequency; the SFG wavelength conversion device comprising a periodically poled lithium niobate (PPLN) waveguide; the first optical fiber being connected to the PPLN waveguide by means of abutment connection without using any lens; and the PPLN waveguide being connected to the second optical fiber by means of abutment connection without using any lens.