Patent ID: 8804778
Filing Date: 2014-08-12
Classification: B82Y,G03F,H01S

Abstract:
1. A laser apparatus comprising: a master oscillator including a plurality of quantum cascade lasers each of which outputs one or more longitudinal-mode laser lights; an optical combiner configured for combining the longitudinal-mode laser lights from the plurality of the quantum cascade lasers to output a combined longitudinal-mode laser light; an amplifier with a molecular gas as an amplifying medium amplifying the combined longitudinal-mode laser light of which wavelength is included in one of amplifiable lines; at least one pair of high-reflective mirrors arranged so as to sandwich an amplifiable region of the amplifier in order to make the longitudinal-mode laser lights outputted from the master oscillator shuttle in the amplifiable region more than once; a plurality of Peltier elements each of which is configured for contacting corresponding one of the quantum cascade lasers; and a controller configured for controlling at least one of the Peltier elements at a temperature different from a temperature of another Peltier element so that at least a part of wavelength of the longitudinal-mode laser light from each quantum cascade laser is included in one of the amplifiable lines.