Wavelength multiplexing and demultiplexing with one single volume hologram in photorefractive crystal |
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| Authors: | Xiaona Yan Lingliang Liang Xihua Yang Ye Dai Hongmei Liu |
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| Affiliation: | 1. Physics Department of Science College , Shanghai University , Shanghai 200444, China xnyan@mail.shu.edu.cn;3. Physics Department of Science College , Shanghai University , Shanghai 200444, China |
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| Abstract: | Based on anisotropic diffraction of a volume phase grating in a photorefractive crystal, we theoretically discuss an optical multi- and demultiplexing scheme implemented by one single grating in photorefractive LiNbO3 crystal. It shows that our scheme can simultaneously demultiplex 93 channels in the telecommunication wavelength around 1550?nm. Using only one grating to realize WDM can avoid the multiple exposure problems encountered by multiple hologram scheme. Moreover, in our scheme, the transmitted and diffracted beams are orthogonal to each other, thus we don't need to use a normal recording and readout structure. Our theoretical results can be used in the design of a WDM device. |
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| Keywords: | WDM volume grating anisotropic Bragg diffraction diffraction efficiency |
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