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Post by goduranus on Dec 24, 2016 15:01:15 GMT
Right now people use a high laser temperature to reduce their radiator size around, 2300k, but this forces molybdenum to be used as the reflector material, which is less efficient. It would be good for laser designs if the heat could be pumped in several stages, so the laser cavity can stay at 1100K for silver reflectors, while the radiators stay at 2300K. Does this have real life limitations?
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Post by bigbombr on Dec 24, 2016 16:00:54 GMT
Right now people use a high laser temperature to reduce their radiator size around, 2300k, but this forces molybdenum to be used as the reflector material, which is less efficient. It would be good for laser designs if the heat could be pumped in several stages, so the laser cavity can stay at 1100K, while the radiators stay at 2300K. Does this have real life limitations? It would be more complex, and heavier. It would be nice if it would be implemented so we can tinker with it and determine it's usefulness. |
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Post by n2maniac on Dec 24, 2016 20:32:57 GMT
Running the laser at 2300K rather than 1100K roughly doubles the power required for a given output laser power. One could use a heat pump in theory to pump this heat from 1100K to 2300K, but a perfectly efficient one (Carnot efficiency) would take about the same power as the waste heat, again roughly doubling the power required to operate this. A better solution would be making the reflective cavity as a dichroic mirror dielectric mirror of layered dielectrics (like diamond & fused quartz layers) backed with molybdenum. Or keeping a cool film of hydrogen on the silver reflector (if this was at all possible), splitting the cooling loads. Edit: DIELECTRIC mirror, not necessarily dichroic. Sorry for the confusion |
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