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Proceedings Paper

Optical add/drop multiplexer based on subtractive dispersion planar reflective gratings
Author(s): S. Bidnyk; M. Pearson; A. Balakrishnan; M. Gao
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Paper Abstract

Optical add/drop multiplexers (OADMs) have emerged as the key enabling components for building long-haul and metro-area networks. The wide-spread deployment of OADMs in the access market will depend on the availability of cost-effective integrated solutions. We have successfully fabricated a fully-integrated OADM based on planar reflective gratings. The device uses a combination of two grating elements arranged in a subtractive dispersion configuration. The first grating demultiplexes a 300-nm-wide band and drops optical channels at 1490 nm and 1550 nm, commonly used by service providers to send information to the end user. The second grating completely counter-balances the dispersion properties of the first grating and ultimately yields zero dispersion in the output waveguide. Such a configuration allows the transmission of optical signals though the OADM in an ultra-wide band spanning 1250 to 1410 nm. This ultra-wide 'through' band is a critical step allowing the use of low-cost lasers, without temperature stabilization, for sending data to a service provider. The OADM was manufactured using an industry standard silica-on-silicon process which was augmented with grating facet formation and metallization. In spite of using low refractive index contrast waveguides (0.82%), the device had a remarkably low footprint of only 0.25 square centimeters. Applications of the OADM in access market networks is discussed.

Paper Details

Date Published: 13 October 2005
PDF: 7 pages
Proc. SPIE 5970, Photonic Applications in Devices and Communication Systems, 597023 (13 October 2005); doi: 10.1117/12.628625
Show Author Affiliations
S. Bidnyk, Enablence Inc. (Canada)
M. Pearson, Enablence Inc. (Canada)
A. Balakrishnan, Enablence Inc. (Canada)
M. Gao, Enablence Inc. (Canada)

Published in SPIE Proceedings Vol. 5970:
Photonic Applications in Devices and Communication Systems
Peter Mascher; John C. Cartledge; Andrew Peter Knights; David V. Plant, Editor(s)

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