Abstract:
PROBLEM TO BE SOLVED: To provide a technique for switching wavelength stably while facilitating the maintenance, in a wavelength variable laser apparatus.SOLUTION: The laser apparatus includes a cavity having reflection means and output means, a gain member disposed on the optical path between the reflection means and output means, a wavelength dispersion mechanism for dispersing a light beam passing through the optical path depending on the wavelength, and a wavelength selection mechanism having a wedge prism that can move for the optical path and changes the direction of travel of the light beam, and changing the wavelength of a light beam output from the output means by obtaining a gain from the gain member depending on the position of the wedge prism.
Abstract:
PROBLEM TO BE SOLVED: To emit pulse laser beam in desired wavelength series in a laser light source unit.SOLUTION: A Q switch 55 and a birefringent filter 56 are inserted in an optical resonator including a pair of mirrors 53 and 54 facing each other with a laser rod 51 inserted therebetween. The birefringent filter 56 changes an oscillation wavelength of the optical resonator in association with rotational displacement. A rotation control unit 60 rotates the birefringent filter 56 at a prescribed rotational speed corresponding to the number of wavelengths included in a wavelength series of the pulse laser beam to be emitted. A light emission control unit 61 turns on the Q switch 55 to emit pulse laser beam at the timing that the rotational displacement position of the birefringent filter 56 changes to the position corresponding to the wavelength of the pulse laser beam to be emitted after a flash lamp 52 irradiates the laser rod 51 with exciting light.
Abstract:
A solid-state laser device, which comprises a first resonator for projecting a first laser beam and a second resonator for projecting a second laser beam, wherein the first resonator and the second resonator commonly share a part of an optical axis and an output mirror, and which comprises a first light emitting unit for the first resonator, a second light emitting unit for the second resonator, a monitoring means for splitting and monitoring a part of the first laser beam and for splitting and monitoring a part of the second laser beam among the laser beams projected from the output mirror, and a control unit for controlling at least one of the first light emitting unit and the second light emitting unit based on a detection result from the monitoring means.