Reduction of interchannel interference noise in a two-channel grating-based OCDMA system using a nonlinear optical loop mirror
Reduction of interchannel interference noise in a two-channel grating-based OCDMA system using a nonlinear optical loop mirror
We show that a nonlinear optical switch can be used to suppress the interchannel noise generated under multiuser operation within a coherent, direct-sequence optical code-division multiple-access (OCDMA) system. By incorporating a simple nonlinear optical loop mirror (NOLM) within the receiver, we demonstrate a 3.6-dB power penalty reduction in a two-channel 1.25-Gb/s 64-chip 160-Gchip/s grating-based direct-sequence OCDMA system. Even greater improvements in system performance were obtained at a data rate of 2.5 Gb/s, where the noise due to the overlap of adjacent decoded data bits also needs to be suppressed. In both instances, the system performance under two-channel operation with nonlinear filtering was shown to be comparable to that achieved under single-channel operation using the conventional matched-filter approach.
529-531
Lee, J.H.
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Teh, P.C.
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Petropoulos, P.
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Ibsen, M.
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Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
2001
Lee, J.H.
3b88784a-02e7-4b63-b112-3fdb4e1abf4e
Teh, P.C.
1e229dd3-3374-4599-b220-be515ac1ed51
Petropoulos, P.
522b02cc-9f3f-468e-bca5-e9f58cc9cad7
Ibsen, M.
22e58138-5ce9-4bed-87e1-735c91f8f3b9
Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Lee, J.H., Teh, P.C., Petropoulos, P., Ibsen, M. and Richardson, D.J.
(2001)
Reduction of interchannel interference noise in a two-channel grating-based OCDMA system using a nonlinear optical loop mirror.
IEEE Photonics Technology Letters, 13 (5), .
(doi:10.1109/68.920775).
Abstract
We show that a nonlinear optical switch can be used to suppress the interchannel noise generated under multiuser operation within a coherent, direct-sequence optical code-division multiple-access (OCDMA) system. By incorporating a simple nonlinear optical loop mirror (NOLM) within the receiver, we demonstrate a 3.6-dB power penalty reduction in a two-channel 1.25-Gb/s 64-chip 160-Gchip/s grating-based direct-sequence OCDMA system. Even greater improvements in system performance were obtained at a data rate of 2.5 Gb/s, where the noise due to the overlap of adjacent decoded data bits also needs to be suppressed. In both instances, the system performance under two-channel operation with nonlinear filtering was shown to be comparable to that achieved under single-channel operation using the conventional matched-filter approach.
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Published date: 2001
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Local EPrints ID: 13704
URI: http://eprints.soton.ac.uk/id/eprint/13704
ISSN: 1041-1135
PURE UUID: 53473636-d3c8-4473-9ba8-467d7a59e581
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Date deposited: 03 Jan 2005
Last modified: 16 Mar 2024 02:58
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J.H. Lee
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P.C. Teh
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