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An important part of the Laser4DIY system is the cooling system. There are four components that need to be actively cooled: the laser disode, the KTP crystal, the Cr4+:YAG crystal and the Nd:YVO4 crystal. The laser diode is the component which the most demanding cooling requirements as it produces a lot of waste heat but at the same time needs to be held at a constant temperature to avoid fluctuations in wave length of the produced laser light.
Our appraoch is a interesting is the low-cost cooling setup which combines the precision of thermoelectrical
controlled cooling with the low cost of off-the-shelf CPU cooling components. As one can
see in the figure below two cooling loops are used, one for the laser diode and one for the crystals.
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