The frequency-doubling performance of CdGeAs2 as a function of wavelength has been characterised using a representative selection of lines from the 9 and 10 μm bands of a single mode TEA CO2 laser. Results are shown to be in good agreement with theory in which wavelength dependent absorption, most significant for the generated signal, is taken into account.
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Al-Saidi, I.A., Harrison, R.G. Wavelength dependence of high-efficiency second-harmonic generation in CdGeAs2 . Appl. Phys. B 36, 17–20 (1985). https://doi.org/10.1007/BF00698031