Design and Fabrication of a Gaussian Fan-Out Optical Interconnect
Abstract
A phase-retrieval algorithm is described and used to optimize the phase profile of a multilevel phase grating that achieves a two-dimensional Gaussian fin-out. Binary-optics technology is used to fabricate a surface-relief structure that implements this optimized phase profile. The results of the fabrication process are summarized, and the experimental measurements on the fan-out element are presented. Differences between theory and experiment arise from scalar-theory approximations used in the design algorithm. In order to illustrate the scalar-theory limitations, a rigorous formulation is used to analyze the diffraction efficiency and the reconstruction error of a representative binary surface-relief phase grating as a function of the period- to-wavelength ratio. The analysis serves to show qualitatively the effects of the period-to-wavelength ratio on the performance of free-space optical interconnects designed with a scalar-theory formalism.... Optical interconnects, Binary optics, Holographic optical elements, Computer-generated holograms.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 10, 1993
- Accession Number
- ADA268366
Entities
People
- Gary J. Swanson
- Vincent V. Wong
Organizations
- Massachusetts Institute of Technology