Patent ID: 9419406
Filing Date: 2016-08-16
CPC Classification: H01S

Claim Text:
1. A laser oscillator comprising: a resonator part which generates laser light; a laser medium flow path for introducing a laser medium into the resonator part and discharging the laser medium from the resonator part; a blower which makes the laser medium to flow through the laser medium flow path; a drive part which drives the blower; a controller which controls the drive part; a manometer which measures a pressure of the laser medium at a predetermined position of the laser medium flow path; and a rotation speed estimating part which estimates a rotation speed of the blower, based on a predetermined relationship between the pressure of the laser medium at the predetermined position and the rotation speed of the blower, and on the pressure of the laser medium measured by the manometer, wherein the controller controls the drive part so as to restart the operation of the blower at the rotation speed estimated by the rotation speed estimating part when a power supply to the blower is stopped and the blower is idling.