LASER OSCILLATOR AND LASER MATERIAL PROCESSING MACHINE

摘要

A laser oscillator includes blower (10) for blowing laser gas (2) to discharge tubes (4); gas circulation path (12) for connecting discharge tubes (4) and blower (10); gear chamber pressure detector (42) for detecting the pressure of the gear chamber disposed in blower (10); and alarm part (43) for issuing an alarm when the pressure detected in gear chamber pressure detector (42) is higher than a predetermined pressure. The predetermined pressure is set based on the average value of the pressure on laser gas inlet side (10f) and the pressure on laser gas outlet side (10g) of blower (10). This configuration can prevent the entry of the oil mist generated from the blower into gas circulation path (12) and an increase in the gas consumption, while maintaining stable laser output for an extended period of time without increasing the running cost.