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首页> 外文会议>International Conference on Lasers, Applications, and Technologies >Holographic Volume Gratings in Dye-Doped Jelly-Like Gelatin
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Holographic Volume Gratings in Dye-Doped Jelly-Like Gelatin

机译：染料掺杂果冻果冻的全息体积光栅

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摘要

Holographic characteristics of a thick self-developing photosensitive medium - dye-doped jelly-like gelatin are investigated by means of pulsed laser exposure. The experiments were performed using aqueous gelatin solutions of Rhodamin 6G with a layer thickness of 1 mm. The slanted holographic gratings were written with two crossed beams from a frequency-doubled (lambda velence 532 nm) and Q-switched YAG:Nd laser ((tau)_(0.5) approx= 17 ns, f <= 50 Hz). In the course of recording the hologram was read with the beam from a single-mode He-Ne laser (lambda velence 632.8 nm) which was not absorbed by the photosensitive medium. The real-time evolution of the grating diffraction efficiency was studied in dependence of the dye and gelatin concentration as well as the writing pulse fluence. It is shown that under appropriate choice of the medium composition and parameters of the recording radiation, it is possible to obtain phase volume holographic gratings with a diffraction efficiency of approx87percent and an angular selectivity of approx20'.
机译：通过脉冲激光曝光研究了厚自发型光敏介质 - 染料掺杂果冻果冻的全息特性。使用罗丹明6g的含水明胶溶液进行实验，层厚度为1mm。用来自频率加倍（Lambda Velence 532nm）和Q开关的YAG：ND激光器（（TAU）_（0.5）约= 17ns，f <= 50Hz）的倾斜全息光阑写入倾斜的全息光栅。在记录过程中，通过从光学介质的单模HE-NE激光（Lambda velence 632.8nm）用光束读取全息图，该激光器未被光敏介质吸收。研究了光栅衍射效率的实时演变，依赖于染料和明胶浓度以及书写脉冲注量。结果表明，在适当的选择下，可以获得记录辐射的介质组成和参数，可以获得具有大约87平方的衍射效率的相体积全息光栅和大约20'的角度选择性。

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