All DPSS lasers have an initial peak in output power within the first few seconds. During this period, your laser is the most powerful and will easily light matches, pop balloons, and cut through black electrical tape. As you leave the laser on for an extended period of time, the power output will decrease. This occurs because heat causes the pump diode and crystals to become less efficient under normal room temperatures. Just let your laser cool down and it should once again be able to perform these laser experiments. Be sure to not use AA or AAA rechargeable batteries in the laser.
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