Wavelength selectable laser oscillator in wavelength tunable...

H - Electricity – 01 – S

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H01S 3/05 (2006.01) H01S 3/094 (2006.01) H01S 3/106 (2006.01) H01S 3/16 (2006.01)

Patent

CA 2203731

An object of the present invention is to provide a wavelength selectable laser oscillator in wavelength tunable laser by which the rate of repetitive pulse oscillation of laser beam in a laser resonator can be markedly increased in comparison with that of conventional ones, besides excitation input can be decreased, and in addition, speed-up of wavelength tuning speed can be achieved, whereby flexibility is remarkably elevated in case of practicing the wavelength selectable laser oscillator. The wavelength selectable laser oscillator in wavelength tunable laser comprises a laser resonator composed of opposed mirrors each having a prescribed reflectivity; a wavelength tunable laser medium disposed in the laser resonator and capable of laser oscillation in a wavelength zone of a prescribed range; an acousto- optical crystal disposed in the laser oscillator and to which is inputted the outgoing light from the wavelength tunable laser medium; an acoustic wave inputting means mounted on the acousto- optical crystal and for inputting an acoustic wave to the acousto- optical crystal; an optical element disposed in the laser resonator and for correcting dispersion of the diffracted light outputted from the acousto- optical crystal; and a pulse excitation laser for inputting excitation laser beam into the laser resonator.

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