Abstract: A laser device includes a light source configured to emit a laser light, a first mirror and a second mirror constituting a resonator where a laser light emitted from the light source enters, a nonlinear optical medium located between the first mirror and the second mirror, and a dispersive medium of adjustable effective optical thickness located between the nonlinear optical medium and at least one of the first mirror and the second mirror.

Abstract: A Q switch resonator includes: an optical resonator comprising at least two mirrors, and configured to accumulate power of a continuous wave or an intermittent continuous wave incident from an outside; and a switching element provided in the optical resonator. The switching element is configured such that, when the power accumulated in the optical resonator increases to a predetermined level, the switching element outputs an optical pulse by lowering a Q factor from a first level to a second level lower than the first level.

Abstract: A laser device includes a light source configured to emit a laser light, a first mirror and a second mirror constituting a resonator where a laser light emitted from the light source enters, a nonlinear optical medium located between the first mirror and the second mirror, and a dispersive medium of adjustable effective optical thickness located between the nonlinear optical medium and at least one of the first mirror and the second mirror.

Abstract: A laser resonator includes a pair of optical elements forming a first optical path having a focused beam waist, one or more mirrors forming a second optical path of approximately parallel light connected to the first optical path, and a laser medium arranged in the second optical path. Induced emission light generated from the laser medium reciprocates or circles in a path formed by the first optical path and the second optical path. A distance between the pair of optical elements is adjustable, and a beam diameter at the second optical path is adjusted by adjusting the distance between the pair of optical elements.

Abstract: A laser resonator includes a pair of optical elements forming a first optical path having a focused beam waist, one or more mirrors forming a second optical path of approximately parallel light connected to the first optical path, and a laser medium arranged in the second optical path. Induced emission light generated from the laser medium reciprocates or circles in a path formed by the first optical path and the second optical path. A distance between the pair of optical elements is adjustable, and a beam diameter at the second optical path is adjusted by adjusting the distance between the pair of optical elements.

Abstract: A laser device includes a light source that radiates a laser beam having one or more frequencies, and a nonlinear optical medium on which the laser beam is incident, the non-linear optical medium including at least one dispersive medium that is transparent and arranged along a direction in which the laser beam is radiated. The nonlinear optical medium drives a nonlinear optical process including generation of laser beams having different frequencies. The at least one dispersive medium has an effective thickness that causes a relative phase relationship among all the laser beams relevant to the nonlinear optical process to approximately satisfy a predetermined value.

Abstract: A laser device includes a light source that radiates a laser beam having a discrete spectrum; and at least one crystal plate through which the laser beam is transmitted. The at least one crystal plate is an axial crystal plate. The at least one crystal plate is configured to generate an arbitrary polarization distribution of the discrete spectrum by adjusting at least one of the thickness and the angle of the at least one crystal plate.

Abstract: A laser device includes a light source that radiates a laser beam having a discrete spectrum; and at least one crystal plate through which the laser beam is transmitted. The at least one crystal plate is an axial crystal plate. The at least one crystal plate is configured to generate an arbitrary polarization distribution of the discrete spectrum by adjusting at least one of the thickness and the angle of the at least one crystal plate.

Abstract: A laser device includes a light source that radiates a laser beam having one or more frequencies, and a nonlinear optical medium on which the laser beam is incident, the non-linear optical medium including at least one dispersive medium that is transparent and arranged along a direction in which the laser beam is radiated. The nonlinear optical medium drives a nonlinear optical process including generation of laser beams having different frequencies. The at least one dispersive medium has an effective thickness that causes a relative phase relationship among all the laser beams relevant to the nonlinear optical process to approximately satisfy a predetermined value.