Patent ID: 9583909
Date: 2017-02-28
CPC Classifications: H01S

Claim:
1. A gas laser oscillator comprising: a resonator unit including a discharge unit for exciting a laser gas by a discharge, the resonator unit configured to oscillate a laser beam generated by excitation of the laser gas; a heat exchanger configured to flow a fluid therethrough to exchange heat with the laser gas; a chiller configured to suction the fluid in the heat exchanger, cool the fluid, and supply the fluid into the heat exchanger; a heat transfer device configured to transfer heat of the fluid to the resonator unit; a first flow path configured to supply the fluid used for cooling the laser gas in the heat exchanger from the heat exchanger to the heat transfer device; a second flow path configured to supply the fluid cooled by the chiller to the heat transfer device prior to supplying the fluid to the heat exchanger; and a switching valve configured to switch either one of the first flow path and the second flow path.