LASER DEVICE AND PHOTOACOUSTIC MEASUREMENT DEVICE

摘要

Disclosed is a laser device which can emit light having first and second wavelengths, having the advantage of increasing laser efficiency without causing an increase in cost. A flash lamp irradiates excitation light onto a laser rod. An optical resonator includes a pair of mirrors facing each other with the laser rod interposed therebetween. A wavelength switching unit includes a long path filter which transmits light having a wavelength equal to or greater than a first wavelength. The wavelength switching unit inserts the long path filter on the optical path of the optical resonator when the wavelength of laser light to be emitted is the first wavelength.

主权项

1. A laser device which emits light having a plurality of wavelengths including a first wavelength and a second wavelength having a shorter wavelength than the first wavelength, and the second wavelength has a laser gain coefficient higher than a laser gain coefficient at the first wavelength in a laser gain coefficient wavelength characteristic, the laser device comprising:
a laser medium; an excitation light source which irradiates excitation light onto the laser medium; an optical resonator which includes a pair of mirrors facing each other with the laser medium interposed therebetween; and a wavelength switching unit which includes a first long path filter, which transmits light having a wavelength equal to or greater than the first wavelength, and inserts the first long path filter on the optical path of the optical resonator when the wavelength of laser light to be emitted is the first wavelength.