Polymer-Based Volume Holograms for a Surface-Normal 3×3 Non-Blocking Wavelength-Selective Crossbar

  • Charles C. Zhou
  • Joseph I. Chen
  • Ray T. Chen


In this paper, we present a 3x3 non-blocking crossbar for network applications. This device is pivotal for the realization for a computer-to-computer interconnect network where both wavelength division multiplexing and space division multiplexing are employed to enhance the transmission bandwidth. We report the formation of a surface -normal wavelength selective non-blocking crossbar using photopolymer-based volume holograms in conjugation with graded index (GRIN) lenses. The elimination of edge-coupling significantly enhances the packaging reliability. Furthermore, such a configuration is compatible with the implementation of vertical cavity surface-emitting lasers where the characteristic of azimuthal symmetry is maintained in the waveguiding substrate. The prototype polymer-based volume hologram for a multiple-wavelength 3x3 crossbar is experimentally demonstrated at 755, 765, and 775 nm. The unique beam routing property of GRIN lens reduced nine wavelengths to three wavelengths while maintaining the required nine (3x3) individual interconnects. Realizing the fact that the wavelength-switching speed of semiconductor lasers is as fast as 1 nsec, we expect to build a fully packaged system with much less system latency.


Output Surface Channel Separation Azimuthal Symmetry Grin Lens Volume Hologram 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    L. A. Bergman, A. J. Mendez and L. S. Lome, Bit parallel wavelength links for high performance computer networks, SPIE Critical Revie., (1996).Google Scholar
  2. 2.
    M. M. Li, R. T. Chen, Sunning Tang, and Dave Gerold, Angular limitations of polymer-based waveguide holograms for 1-to-many V-shaped surface-normal optical interconnects, Appl. Phys. Lett. 65:1070 (1994).CrossRefGoogle Scholar
  3. 3.
    H. Kogelnik, Coupled wave theory for thick hologram gratings, The Bell Sys. Tech. J. 48:2909(1969).CrossRefGoogle Scholar
  4. 4.
    W. M. Rosenblum, J. W. Blaker and M. G. Block, Matrix methods for the evaluation of lens systems with radial gradient-index elements, American Journal of Optometry and Physiological Optic., 65:661 (1988).CrossRefGoogle Scholar
  5. 5.
    IEEE Standard for Scalable Coherent Interface (SCI), IEEE STD 1596–1992.Google Scholar
  6. 6.
    1996 Spring quarterly Report of ARPA center for Optoelectronics Science and Technology.Google Scholar
  7. 7.
    C. Chang, J. Harbison, et al. Multiple wavelength tunable surface-emitting laser arrays, IEEE J. Quan. Electr., 27:1368 (1991).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Charles C. Zhou
    • 1
  • Joseph I. Chen
    • 1
  • Ray T. Chen
    • 1
  1. 1.Microelectronics Research CenterUniversity of Texas, AustinAustinUSA

Personalised recommendations