| 摘要 |
<p>Disclosed is a laser device which increases the range in which spectral width adjustment of the laser device is possible. The laser device may include: (1) an excitation source which excites a laser medium in a laser gain space; (2) an optical resonator which includes an output coupler arranged on one side of an optical path passing through the laser gain space, and a wavelength dispersion element arranged on the other side of the optical path passing through the laser gain space; and (3) a switching mechanism in which at least one beam-width alteration element that expands or contracts beam width is arranged so as to be removably inserted into the optical path between the laser gain space and the wavelength dispersion element, and in which the rate of expansion or the rate of contraction of the beam width is switched by inverting the direction of the at least one beam-width alteration element in the aforementioned optical path.</p> |
