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1 April 1991 Computer-generated holograms fabricated on photopolymer for optical interconnect applications
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Computer generated holograms (CGH) and holographic optical elements (HOE) were fabricated onto thick photopolymer(Du Pont HRF films) to demonstrate interconnects architectures based on the hypercube and perfect shuffle designs. A 16element CGH Fresnel lens array was used to fabricate the multifacet holograms which are recorded as phase modulation because of the exposuredependent refractive index change of the photopolymer. The recording method can be applied to other holographic elements to be used for spacevariant optical interconnect configurations. I NTRODUCTI ON The need to overcome the interconnect bottleneck in massive parallel computing architectures has been the subject of much discussion. Free space optical interconnects based on CGH''s and HOE''s can potentially provide a practical solution to this problem[13]. They provide the possibility of implementing an arbitrary mapping using a single optical element. such a space variant interconnects topology can result in high degree of flexibility and interconnects density. One such an approach involves a 2D input array of processing elements(PE''s) each drives a semiconductor laser its beam is directed onto a HOE that images it into one or more photodetector located on an output array of PE''s. [4Similarly the system can be coherent[5] when the input array is spatial light modulator illuminated by a laser. This paper deals with the design and fabrication of transmission HOE''s for free space optical interconnects in two specific examples the hypercube and the perfect shuffle architectures.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Moshe Oren "Computer-generated holograms fabricated on photopolymer for optical interconnect applications", Proc. SPIE 1389, Microelectronic Interconnects and Packages: Optical and Electrical Technologies, (1 April 1991);

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