1 August 1995 Highly efficient photorefractive polymers for dynamic holography
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Abstract
The performance of recently developed highly efficient photoref_ ract1ve polyme_rs .base~ on the photoconducting polymer host poly( N-vinylcarbazole) 1s 1nvest1gated, and the use of these materials as recording media in dynamic holography and other applications is evaluated.- A diffraction efficiency 'rJ = 86% (limited only by absorption and reflection losses), a two-beam coupling net gain coefficient r = 200 cm - 1 and light-induced refractive index modulations as high as lin=7X 10-3 are demonstrated. Hologram growth rates of the order of 500 ms are observed with. recording light intensities <10 mW /cm2 , using either lowpower laser diodes (675 nm) or a HeNe laser (633 nm). The materials show good sensitivity in this part of the spectrum. Applications such as dynamic time-average interferometry are demonstrated.
Boris L. Volodin, Sandalphon, Klaus Meerholz, Bernard Kippelen, Nickolai V. Kukhtarev, Nasser Peyghambarian, "Highly efficient photorefractive polymers for dynamic holography," Optical Engineering 34(8), (1 August 1995). https://doi.org/10.1117/12.209459
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