Ishii Y, Kubota T
Appl Opt. 1993 Aug 10;32(23):4415-22. doi: 10.1364/AO.32.004415.
A single-transmission holographic optical element capable of broadband five-channel demultiplexing in multimode fiber is described. A holographic optical element demultiplexer combines a hologram on dichromated gelatin with a computer-generated hologram. A design of the demultiplexer with a nonspherical wave front based on ray tracing and the optimization technique perfectly permits five cross-talk isolations by reducing the aberrations of multiple focused spots caused by a recording-readout wavelength shift. Such a system has a channel separation of 300 µm (20 nm in wavelength difference) between adjacent fibers in an operating laser diode wavelength region of 0.8-0.88 µm. Experiments demonstrating the feasibility of this demultiplexer with a 780-nm laser diode source are presented.
描述了一种能够在多模光纤中进行宽带五通道解复用的单传输全息光学元件。全息光学元件解复用器将重铬酸盐明胶上的全息图与计算机生成的全息图相结合。基于光线追踪和优化技术的非球面波前解复用器设计，通过减少记录 - 读出波长偏移引起的多个聚焦光斑的像差，完美地实现了五个串扰隔离。在0.8 - 0.88 µm的工作激光二极管波长区域内，这种系统相邻光纤之间的通道间距为300 µm（波长差20 nm）。给出了用780 nm激光二极管源证明该解复用器可行性的实验。
