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Proceedings Paper

Code generator using distributed phase shifts applied on a chirped fibre Bragg grating in a semiconductor fibre ring laser
Author(s): Alexandre D. Simard; Sophie LaRochelle
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Paper Abstract

As data traffic increases on telecommunication networks, optical communication systems must adapt to deal with this increasing bursty traffic. Packet switched networks are considered a good solution to provide efficient bandwidth management. We recently proposed the use of spectra amplitude codes (SAC) to implement all-optical label processing for packet switching and routing. The implementation of this approach requires agile photonic components including filters and lasers. In this paper, we propose a reconfigurable source able to generate the routing codes, which are composed of two wavelengths on a 25 GHz grid. Our solution is to use a cascade of two chirped fibre Bragg gratings (CFBG) in a semiconductor fibre ring laser. The wavelength selection process comes from distributed phase shifts applied on the CFBG that is used in transmission. Those phase shifts are obtained via local thermal perturbations created by resistive chrome lines deposited on a glass plate. The filter resonances are influenced by four parameters: the chrome line positions, the temperature profile along the fibre, the neighbouring heater state (ON/OFF) and the grating itself. Through numerical modeling, these parameters are optimized to design the appropriate chrome line pattern. With this device, we demonstrate successful generation of reconfigurable SAC codes.

Paper Details

Date Published: 4 August 2009
PDF: 7 pages
Proc. SPIE 7386, Photonics North 2009, 73860O (4 August 2009); doi: 10.1117/12.838238
Show Author Affiliations
Alexandre D. Simard, COPL, Univ. Laval (Canada)
Sophie LaRochelle, COPL, Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 7386:
Photonics North 2009
Réal Vallée, Editor(s)

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