Abstract
Effective values of optical constants for materials used in waveguide CO2 lasers (Alumina, Beryllia and Silica) are reported. The refractive index (n) and extinction coefficient (k) have been measured by refractometry at exact CO2 laser wavelengths taking into account real conditions of waveguiding (sample quality, surface finish, angle of incidence). These effective values should be convenient to predict waveguiding properties of hollow waveguides used for transmission of the CO2 laser beam or to predict laser signatures.
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