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Optical Engineering

Structuring waveguide-grating-based wavelength-division multiplexing/optical code division multiple access network codecs over topology of concentric circles
Author(s): Jen-Fa Huang; Ta-Chun Nieh; Kai-Sheng Chen
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Paper 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.

Paper Details

Date Published: 11 January 2013
PDF: 12 pages
Opt. Eng. 52(1) 015006 doi: 10.1117/1.OE.52.1.015006
Published in: Optical Engineering Volume 52, Issue 1
Show Author Affiliations
Jen-Fa Huang, National Cheng Kung Univ. (Taiwan)
Ta-Chun Nieh, National Cheng Kung Univ. (Taiwan)
Kai-Sheng Chen, National Cheng Kung Univ. (Taiwan)


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