Jisha C P, Kishore V C, John Beena Mary, Kuriakose V C, Porsezian K, Kartha C Sudha
Department of Physics, Cochin University of Science and Technology, Kochi 682022, India.
Appl Opt. 2008 Dec 10;47(35):6502-7. doi: 10.1364/ao.47.006502.
We report the observation of a self-written waveguide inside a bulk methylene blue sensitized poly/vinyl alcohol)/acrylamide photopolymer material. Light from a low power He-Ne laser is focused into the material, and the evolution of the beam is monitored. The refractive index of the material is modulated in the region of high intensity due to photobleaching and photopolymerization effects occurring in the material. As a result, the beam propagates through the medium without any diffraction effects.
我们报告了在块状亚甲基蓝敏化的聚（乙烯醇）/丙烯酰胺光聚合物材料内部观察到自写波导的情况。来自低功率氦氖激光器的光聚焦到该材料中，并监测光束的传播过程。由于材料中发生的光漂白和光聚合效应，材料的折射率在高强度区域受到调制。结果，光束在介质中传播时没有任何衍射效应。
