T. Yovcheva, I. Naydenova, I. Vlaeva, S. Martin, V. Toal, S. Sainov
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引用次数: 0
Abstract
The present work studies the optical and holographic characteristics of acrylamide-based photopolymer layers. The refractive index change of a liquid acrylamide photopolymer due to exposure at 532 nm is obtained for the first time, using a critical angle laser micro-refractometer. The 30 μm thick solid photopolymer films are prepared by casting on glass substrates. Bragg holographic gratings with spatial frequencies of 710 mm -1 , 1050 mm -1 and 1600 mm -1 are recorded using a diode laser operating at 532 nm wavelength. We investigate the dependence of the diffraction efficiency on the exposure energy. The obtained results are compared with the Stetson holographic recording method, where two gratings are simultaneously recorded in the same location with spatial frequencies of 2020 mm -1 and 3670 mm -1 , using a totally reflected reference wave from the air-photopolymer interface. Despite the fact that in the latter method the two gratings share the same dynamic range, higher diffraction efficiencies are observed.
本文研究了丙烯酰胺基光聚合物层的光学和全息特性。利用临界角度激光微折射仪,首次获得了液体丙烯酰胺光聚合物在532 nm处曝光后的折射率变化。在玻璃基板上采用浇铸法制备了30 μm厚的固体光聚合物薄膜。利用波长为532 nm的二极管激光器记录了空间频率为710 mm -1、1050 mm -1和1600 mm -1的Bragg全息光栅。我们研究了衍射效率与曝光能量的关系。利用来自空气-光聚合物界面的全反射参考波,在同一位置同时记录两个光栅,空间频率分别为2020 mm -1和3670 mm -1,并将所得结果与Stetson全息记录方法进行了比较。尽管在后一种方法中,两个光栅具有相同的动态范围,但观察到更高的衍射效率。
期刊介绍:
The Journal of Optoelectronics and Advanced Materials (J. Optoelectron. Adv. M.) appears with 12 issues per year and publishes papers in the field of optoelectronics, photonics, and new advanced materials (nonlinear optical materials, crystalline and non-crystalline materials, nano-structured materials, magnetic materials, functional and smart materials, materials based on polymers, biomaterials) of relevance for optoelectronics and photonics.