Patent ID: 9685758
Date: 2017-06-20
CPC Classifications: H01S

Claim:
1. A laser system comprising a plurality of laser oscillation units and configured to combine laser light emitted from the plurality of laser oscillation units for emission to the outside, wherein each of the laser oscillation units includes a plurality of laser diode module groups each including at least one laser diode module acting as a light source or excitation light source, a first optical coupling part combining the laser light emitted from the plurality of laser diode module groups, and at least one first photodetection part detecting the output power of laser light combined by the first optical coupling part, the laser system comprises a second optical coupling part combining the laser light emitted from the plurality of laser oscillation units, at least one second photodetection part detecting the output of the laser light combined by the second optical coupling part, power supply parts that are able to supply driving current to the plurality of laser diode module groups independently from each other, a recording part recording optical output characteristics showing the relationship between driving current and output power of laser light at each of the laser diode module groups, a control part commanding driving conditions showing the driving current to be supplied to each of the laser diode module groups to the power supply parts, a judging part judging any fault or deterioration of the components of the laser system, and an operating part used for setting the driving conditions, and the judging part is configured to judge, simultaneously for at least two laser oscillation units among the plurality of laser oscillation units, any fault or deterioration of the components of the laser system based on the results of detection of the first photodetection part and the second photodetection part when successively driving the plurality of laser diode module groups included in each of the laser oscillation units so that their drive times do not overlap.