What happens in their lab?

This is a pretty cool experiment and it is described as such:

In this video, one of my laser diodes is tested to destruction with an interesting cooling experiment. The experiment was to verify whether or not a larger power output was possible from a “medium” power diode(ML101U29-25) under almost cryogenic temperatures. The diode suffered from a “thermal runaway” in the end, as was determined by the self-increasing current effect. This diode definitely seemed to be outputting over 1W of power, but I cannot say for sure.(I need a laser power meter)

Note: Do not try this without the supervision of a professional.

Let’s see this laser in action in the video on page 2

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