A Nonlinear Switch Based on Irregular Structures and Nonuniformity in Doped Photonic Crystal Fibers

AbdelMalek, Fathi and Li, Hongbo and Schuelzgen, Axel and Moloney, Jerome V. and Peyghambarian, Nasser and Ademgil, Huseyin and Haxha, Shyqyri (2009) A Nonlinear Switch Based on Irregular Structures and Nonuniformity in Doped Photonic Crystal Fibers. IEEE Journal of Quantum Electronics, 45 (6). pp. 684-693. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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We propose a novel nonlinear switchbased on the irregularity in a three-core-doped photonic crystal fiber (PCF). We numerically investigate the proposed structure, which consists of air holes arranged in a triangular lattice around two defects separated by a single Er-Yb doped core. Its switching operation is based on the gain change in the doped core due to the nonuniformity and irregular structure around it. It is shown that by adjusting the gain in the doped core, the light is entirely transferred from the central core to the upper and lower ones. We have employed the full vectorial finite-element method and the finite-difference time domain to investigate and optimize the optical modes, nonlinear parameter, and gain effects on the switching operations. It is found that an optimum gain is essential to allow either a periodic exchange of the light between the upper and lower cores or independent core propagation. Possible nonuniformity in the hole diameters and irregularity problems of the proposed PCF design during the fabrication process have been predicted. The waveguide dispersoin with respect to the doped central core region has been thoroughly investigated.

Item Type: Article
Uncontrolled keywords: Birefringence, chromatic dispersion, optical switches, photonic crystal fibers
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK8300 Optoelectronic devices
Divisions: Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: J. Harries
Date Deposited: 16 Apr 2010 14:01
Last Modified: 29 May 2014 10:16
Resource URI: https://kar.kent.ac.uk/id/eprint/24275 (The current URI for this page, for reference purposes)
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