Structuring waveguide-grating-based wavelength-division multiplexing/optical code division multiple access network codecs over topology of concentric circles

Jen-Fa Huang; Ta-Chun Nieh; Kai-Sheng Chen

doi:10.1117/1.OE.52.1.015006

11 January 2013 Structuring waveguide-grating-based wavelength-division multiplexing/optical code division multiple access network codecs over topology of concentric circles

Jen-Fa Huang, Ta-Chun Nieh, Kai-Sheng Chen

Author Affiliations +

Optical Engineering, Vol. 52, Issue 1, 015006 (January 2013). https://doi.org/10.1117/1.OE.52.1.015006

Abstract

The cyclic period and free spectral range of arrayed-waveguide gratings (AWG) in a wavelength-division multiplexing/optical code division multiple access optical code division multiple access network are exploited. The total optical network unit (ONU) of network capacity is partitioned into groups of different wavelength in accordance with the geographical location of subscribers based on the radial distance of the ONU to the optical line terminal. Combining concentric circles round by round for ONU groups enables a fixed round-trip time in the data transmission and a significant increase in system performance. Using AWG router, the proposed topology of concentric circles retains signature orthogonality and minimizes wavelength collisions on the photo-detector. Furthermore, the adoption of extended M-sequence codes corresponding to the AWG codec provides a simpler, more efficient coding procedure and accommodates more users in a single group.

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Jen-Fa Huang, Ta-Chun Nieh, and Kai-Sheng Chen "Structuring waveguide-grating-based wavelength-division multiplexing/optical code division multiple access network codecs over topology of concentric circles," Optical Engineering 52(1), 015006 (11 January 2013). https://doi.org/10.1117/1.OE.52.1.015006

Published: 11 January 2013

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