Sensitive polyvinyl alcohol/acrylamide based photopolymer for single pulse holographic recording

Theoretical and Experimental Investigations of Diffraction Characteristics Influenced by Holographic Reciprocity Effect in PQ/PMMA Polymers

“…In order to further investigate the HRE in PQ/PMMA polymers, we experimentally investigate the diffraction characteristics of our materials after one-time exposure [ 30 ], which means the intensity of each diffraction grating is measured once and the only variable is the duration of each exposure. The HRE is evaluated by the GRoDE, where the diffraction efficiency can be defined as the ratio of exposure intensity of the diffracted and reconstructed reference beam [ 31 ] and the GRoDE is the slope of diffraction efficiency at each recording point.…”

Improving performance oftwo‐stagephotopolymers for volume holographic recording by fluorinatedepoxy‐amine cross‐linkedmatrices

“…Compared with continuous or multiple-pulse exposure, single pulse exposure is more likely to fail holographic reciprocity law within nanosecond or less duration, and thus it requires higher sensitivity of materials to record the hologram. [36][37][38] The single-pulse holographic exposure tests (Nd:YAG laser, 532 nm, 150-200 ps pulse width) with the exposure dosage of (I) 2.1-2.6 mJ/cm 2 , (II) 8.7-11.2 mJ/cm 2 , and (III) 22.1-28.0 mJ/cm 2 and the interference angle as 23 were carried out using the sample with 23% Prop-FTGE. As shown in Figure 8, the diffraction efficiency of the sample increased with the increase of exposure dosage, and average 0.17% (I), 1.53% (II), and 4.36% (III) in turn.…”

Современное Состояние Разработки Светочувствительных Сред Для Голографии (Обзор)

“…Фотополимеризующиеся среды толщиной 130 µm на основе ПВС/акриламидной системы с Метиленовым голубым (МГ) (C = 0.14 · 10 −4 M) были использованы для получения отражательных голограмм с η = 2.84% при экспозиции 300 mJ/cm 2 [44]. Состав фотополимеризующейся ПВС/акриламидной композиции был оптимизирован для импульсной ре-гистрации голограмм лазерным излучением с длиной волны 532 nm (8 ns, экспозиция около 80-90 J/cm 2 ) [45]. Благодаря высоким значениям фотоиндуцированного изменения показателя преломления и широкому ди-намическому диапазону ПВС/акриламидные фотополи-меризующиеся композиции представляют интерес для создания устройств оптической памяти.…”