Patent ID: 6249371
Filing Date: 2001-06-19
Classification: G02F

Abstract:
A wavelength converter composed of all solid state material, comprising:a first pulsed laser with repetition frequency at least substantially 1 kHz for generating a laser beam with a first wavelength;a wavelength converting section for converting the wavelength of the laser beam with said first wavelength from said first laser and generating a laser beam with a second wavelengh shorter than said first wavelength;a wavelength converting section for converting the wavelength of the laser beam with said second wavelength and generating a laser beam with a third wavelength shorter than said second wavelength;a second laser including, a resonator on which a laser beam with a wavelength between 500 and 550 nm is incident and which oscillates with a fourth wavelength shorter than said first wavelenghth and longer than said second wavelength; anda wavelength converting part for mixing the laser beam with said third wavelength and the laser beam with said fourth wavelength in said second laser to be a sum frequency and generating a laser beam with a fifth wavelength shorter than said third wavelength,said first laser for amplifying light with said first wavelength between 1 and 1.1 .mu.m and generating a laser beam;a wavelength converting section for converting the wavelength of the laser beam with said first wavelength from said first laser and generating a laser beam with said second wavelength between 500 and 550 nm;a wavelength converting section for converting the wavelength of the laser beam with said second wavelength between 500 and 550 nm and generating a laser beam with said third wavelength between 250 and 275 nm;said second laser on which the laser beam with a wavelength between 500 and 550 nm is incident and which oscillates with said fourth wavelength between 650 and 785 nm; anda wavelength converting part disposed inside of said second resonator of said second laser for mixing the laser beam with said third wavelength between 250 and 275 nm and the laser beam with said fourth wavelength between 650 and 785 nm to be a sum frequency and generating a laser beam with said fifth wavelength between 190 and 200 nm.