Cryolasers target >80% power conversion efficiency

LIFE, HiPER, and ELI high-energy-class lasers all depend on ultra-efficient laser-diode bars with the highest output powers. The laser-bar power-conversion efficiency ideally exceeds 75% (versus 65% state of the art) at a bar power of greater than 800 W (versus 400 W state of the art). The Ferdinand-Braun-Institute (FBH; Berlin, Germany) is currently developing laser-diode bars that will allow these stringent requirements to be met by using designs optimized for operation below the freezing point of water.
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Source: Laser Focus World, 10.10.2013