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In this paper we report on holographic diffraction gratings recorded at visible light wavelength, which can be probed at telecommunication wavelengths. The recording material is an easily prepared, self-processing photopolymer, all of whose components are water soluble. Transmission gratings of various types, namely unslanted, slanted, totally internally reflecting and Bragg gratings were all fabricated. Diffraction efficiencies at telecommunications wavelengths compare favourably with those obtained in visible light.
Toal, V., Whelan, M., Volcan, A., Naydenova, I., Martin, S.: Replay at optical communications wavelengths of holographic gratings recorded in the visible. SPIE proceedings of the International Conference on Holography, Optical Recording and Processing of Information, Vol. 6252, pp.31-37. 2006.