Wang M R, Sonek G J, Chen R T, Jannson T
Appl Opt. 1992 Jan 10;31(2):236-49. doi: 10.1364/AO.31.000236.
Substrate wave propagation and Bragg diffraction by multiplexed holographic gratings have been used to demonstrate a new 1-to-30 fanout optical interconnect having an overall diffraction efficiency of 87.8% at 514.5 nm and an individual channel efficiency of approximately 3.0 +/- 0.8%. The device configuration utilizes the large multiplexing capability of dichromated gelatin polymer films and substrate total internal reflection to realize large channel fanouts within the plane of a soda-lime glass substrate. A simplified theoretical formulation is presented to treat the corresponding three-dimensional holographic diffraction problem in the Bragg regime for slanted phase gratings. Results are compared with experimentally measured quantities for singly exposed phase gratings in different polarization conditions and incident angle orientations. The limitations of using multiplexed holograms in multiplanar substrate interconnection applications are also discussed.
复用全息光栅的衬底波传播和布拉格衍射已被用于展示一种新型的1到30路扇出光互连，其在514.5nm处的总衍射效率为87.8%，单个通道效率约为3.0 +/- 0.8%。该器件配置利用重铬酸盐明胶聚合物薄膜的大复用能力和衬底全内反射，在钠钙玻璃衬底平面内实现大通道扇出。提出了一种简化的理论公式，用于处理布拉格区域中倾斜相位光栅的相应三维全息衍射问题。将结果与不同偏振条件和入射角取向下单曝光相位光栅的实验测量量进行了比较。还讨论了在多平面衬底互连应用中使用复用全息图的局限性。
