Patent ID: 7330490

Claim:
An optical wavelength converter, comprising: a distributed Bragg reflector laser having an active area, a phase area, and a distributed Bragg reflector area in which a distributed Bragg reflector is formed; an optical wavelength conversion device for receiving fundamental wave light emitted from said distributed Bragg reflector laser and outputting second harmonic wave light of the fundamental wave light; and a control circuit for controlling an emission wavelength and a light output by controlling an injection current to be injected into said distributed Bragg reflector laser for each period; wherein said control circuit controls the injection current to be injected into said distributed Bragg reflector laser while satisfying a condition for controlling a light output mode of said distributed Bragg reflector laser so that light energy to be inputted into said optical wavelength conversion device in each of periods is constant and satisfying a condition for injecting a current into each of an active area, a phase area, and a distributed Bragg reflector area in each of periods in a mode of constant amount of generated heat so that an injection current-emission wavelength characteristic in the distributed Bragg reflector area is constant.