Laser oscillator monitoring control system

A laser oscillator monitoring control system comprising:

• a scattered light detection unit that detects a scattered light intensity on an input end surface of a process fiber of a fiber laser oscillator;
• a control unit that controls a laser output value on the basis of a laser output command value from a computer numerical controller and a detection result obtained by the scattered light detection unit;
• a normal scattered light calculation unit that calculates a normal index value indicating a relation between the laser output command value and the scattered light intensity in a normal state;
• a first threshold setting unit that sets a first threshold indicating a relation between the laser output command value and the scattered light intensity in an abnormal state resulting from a contamination and/or a scratch;
• a second threshold setting unit that sets a second threshold indicating a relation between the laser output command value and the scattered light intensity in an abnormal state resulting from an optical axis shift;
• and
• a third threshold setting unit that sets a third threshold indicating the scattered light intensity in an abnormal state of a level in which a component is destroyed, wherein
• the control unit controls a laser output value on the basis of the scattered light intensity detected by the scattered light detection unit, the first threshold, the second threshold, and the third threshold.