Title: Absorption coefficient of infrared laser window materials
Abstract: The absorption coefficient of a number of potential i.r. laser window materials has been measured in the region of multiphonon absorption. Absorptions as low as 0·004 cm−1 have been detected by using thick samples and a differential technique with a dual-beam spectrophotometer. The absorption coefficients of LiF, CaF2, BaF2, SrF2, MgF2, Al2O3, KCl, NaCl and KBr all decrease exponentially with increasing wavenumber. The slope of the exponential bears a nearly constant relationship to the longitudinal optical phonon frequency, consistent with a multiphonon process whose strength depends on the number of phonons generated. Absorption data are also presented for Si, Ge, GaAs: Cr, GaAs: Fe, ZnSe and CdTe.
Publication Year: 1973
Publication Date: 1973-12-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 128
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot