Demultiplexing 120 optical channels with an integrated concave grating with total internal reflection facets

Kenneth A. McGreer; Z. J. Sun; James N. Broughton; M. S. D. Smith

doi:10.1117/12.328684

4 December 1998 Demultiplexing 120 optical channels with an integrated concave grating with total internal reflection facets

Kenneth A. McGreer, Z. J. Sun, James N. Broughton, M. S. D. Smith

Author Affiliations +

Proceedings Volume 3491, 1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications; (1998) https://doi.org/10.1117/12.328684
Event: 1998 International Conference on Applications of Photonic Technology, 1998, Ottawa, Canada

Abstract

The shape of the grooves of a diffraction grating can be designed to take advantage of total internal reflection. We demonstrated the effectiveness of the total internal reflection (TIR) grating numerically for the bulk optic case and experimentally for the integrated optic case. The results indicated that the efficiency of the retro- diffracted order is enhanced by about 10 dB when the TIR grating design is used in place of an echelle grating with no facet metalization. We demonstrate that a TIR grating can be integrated on a chip to demultiplex 120 optical channels that are transmitted in a dense wavelength division multiplexing (DWDM) application. The wavelengths of the channels had a 0.29 nm spacing and were within the 1550 nm wavelength band for DWDM applications.

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Kenneth A. McGreer, Z. J. Sun, James N. Broughton, and M. S. D. Smith "Demultiplexing 120 optical channels with an integrated concave grating with total internal reflection facets", Proc. SPIE 3491, 1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications, (4 December 1998); https://doi.org/10.1117/12.328684

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