Patent ID: 7653096

Claim:
A laser light source device, comprising: a first laser light source section comprising M number of laser light sources, where the m-th laser light source emits a laser light having a frequency shifted from a first fundamental frequency by a m ·Δω (m=1, 2, . . . , M); a second laser light source section comprising M number of laser light sources, where the m-th laser light source emits a laser light having a frequency shifted from a second fundamental frequency by b m ·Δω (m=1, 2, . . . , M); a first optical multiplexer for emitting a first fundamental wave by approximately coaxially superimposing M number of laser lights emitted from said first laser light source section; a second optical multiplexer for emitting a second fundamental wave by approximately coaxially superimposing M number of laser lights emitted from said second laser light source section; and a wavelength conversion optical system, comprising a first wavelength conversion device for generating an A-harmonic wave, of which frequency corresponds to A times of said first fundamental wave, a second wavelength conversion device for generating a B-harmonic wave, of which frequency corresponds to B times of said second fundamental wave, and a third wavelength conversion device for receiving light of said A-harmonic wave and said B-harmonic wave, and generating a sum frequency thereof by sum frequency generation, the laser light source device being characterized in that Expression A·a m +B·b m =0 (a 1 , a 2 , . . . a M and b 1 , b 2 , . . . , b M are arbitrary numbers that satisfy the expression) is satisfied.