Abstract
In many applications incoherent radiation with high entropy is to be converted into coherent radiation with low entropy (e g. lasers) or even into pure work with vanishing entropy (e.g. solar power plants). In order to discuss the thermodynamic efficiency limit of such optical devices the second law of thermodynamics has to be applied to the power and entropy fluxes going into and out of the apparatus.
© 1998 IEEE
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