Thermo-Optic Effects and Heat Removal

  • Walter Koechner
Part of the Springer Series in Optical Sciences book series (SSOS, volume 1)


The optical pumping process in a solid-state laser material is associated with the generation of heat for a number of reasons: a) The energy difference of the photons between the pump band and the upper laser level is lost as heat to the host lattice and causes the so-called quantum defect heating; b) similarly, the energy difference between the lower laser level and the ground state is thermalized; c) since the quantum efficiency of the fluorescence processes involved in the laser transition is less than unity, heating due to quenching mechanisms takes place; and d) the broad spectral distribution of arc lamps or flashlamps is such that there is considerable absorption by the host material, mainly in the ultraviolet and infrared bands.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • Walter Koechner
    • 1
  1. 1.Fibertek, Inc.HerndonUSA

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