5 March 2011 Photochromic effect and holographic recording in doubly doped LiNbO3 crystals
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Proceedings Volume 7998, International Conference on Laser Physics 2010; 79980J (2011); doi: 10.1117/12.890907
Event: International Conference on Laser Physics 2010, 2010, Ashtarak, Armenia
Abstract
Photochromic effect of lithium nioabate crystal doubly doped with Fe and Cu (LN:Fe:Cu) was investigated for 532 nm wavelength illumination with the aim of nonvolatile holographic recording of 2-dimensional (2D) gratings. The investigation showed that the absorption coefficient of LN:Fe:Cu crystal was increased 1.6 times when the illumination intensity was increased from 12.5 mW/cm2 to 96.8 mW/cm2. LN:Fe:Cu crystal was further used for recording of 2D gratings by counter propagating Bessel beam holographic method using cw 532 nm laser beam with 17 mW radiation power. The holographic recording in phorochromic doubly doped LN crystals allowed the essential decrease of the erasure of the stored grating during readout by weaker probe beam at the recording wavelength. The observation showed that during illumination by weak 2mW probe beam the power of diffracted ring decreased to 12% of its original value after 5500 sec. The entire erasure of the stored grating occurred after 8000 sec illumination.
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Paytsar Mantashyan, "Photochromic effect and holographic recording in doubly doped LiNbO3 crystals", Proc. SPIE 7998, International Conference on Laser Physics 2010, 79980J (5 March 2011); doi: 10.1117/12.890907; https://doi.org/10.1117/12.890907
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