Phenomenon: The lasers suddenly stopped emitting beam after working for a period of time, but it returned to normal if restarted. 1 Laser overheats protection (Air- cooled laser sources) Due to the ambient temperature is too high, the lasers have been working under the condition of near-full duty cycle for a long time, under poor cooling conditions, and excessive dust on-site that cause dust accumulation on the lasers fan and heat sink, or chassis enclosure with poor air circulation, all…