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Holographic characteristics of calcium fluoride crystals in the IR region
Full text «Opticheskii Zhurnal»
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Publication in Journal of Optical Technology
Аксёнова К.А., Ангервакс А.Е., Щеулин А.С., Рыскин А.И. Голографические характеристики кристаллов фторида кальция в инфракрасном диапазоне спектра // Оптический журнал. 2015. Т. 82. № 11. С. 56–65.
Aksenova K.A., Angervaks A.E., Shcheulin A.S., Ryskin A.I. Holographic characteristics of calcium fluoride crystals in the IR region [in Russian] // Opticheskii Zhurnal. 2015. V. 82. № 11. P. 56–65.
K. A. Aksenova, A. E. Angervaks, A. S. Shcheulin, and A. I. Ryskin, "Holographic characteristics of calcium fluoride crystals in the IR region," Journal of Optical Technology. 82(11), 760-766 (2015). https://doi.org/10.1364/JOT.82.000760
It is shown that narrow-band transmissive and reflective holographic filters for the near- and mid-IR spectral region can be recorded in calcium fluoride crystals with photochromic color centers. It is established that the diffusion–drift hologram-recording mechanism can provide close to 100% spatial modulation of the color-center concentration. Based on the measured absorption spectra of the crystal, the dispersion of its refractive index in the indicated spectral range is estimated by means of the Kramers–Kronig relations, and the characteristics of transmissive and reflective holograms are calculated. It is concluded that the diffraction efficiency of such holograms can be increased by increasing the concentration of color centers formed in the calcium fluoride crystal at the additive-coloration stage.
calcium fluoride, volume hologram, photochrome, infrared region, Kramers–Kronig relations
Acknowledgements:This work was carried out with the financial support of the Ministry of Education and Science of the Russian Federation for performing scientific research as part of a state task in the sphere of scientific activity under job no. 11.1227.2014/K.
OCIS codes: 090.7330, 160.4670, 260.3060
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