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Power penalties due to in-band and out-of-band dispersion in FBG cascades

Power penalties due to in-band and out-of-band dispersion in FBG cascades
Power penalties due to in-band and out-of-band dispersion in FBG cascades
We measure the in-band dispersion penalty in a cascade of five 50-GHz low-dispersion linear-phase fiber Bragg gratings (FBGs) and compare the results with conventional apodised FBGs. At the 0.5-dB power penalty level, the usable bandwidth of a single linear-phase FBG (40 GHz) is twice as wide as that of a conventional apodised FBG (19 GHz). The bandwidth-utilization factor of a single linear-dispersion grating is 89%, while for the five-grating cascade, it is 76%. To our knowledge, these are the highest values reported to date for cascaded optical devices. The corresponding factors for the conventional gratings are 53% and 31%. We also measure the additional penalty on a dropped channel caused by a cascade of five adjacent-channel gratings. The bandwidth narrowing due to the adjacent-channel FBGs is 6 GHz both for linear-phase and conventional FBGs, giving a usable bandwidth of 34 GHz (linear-phase) and 13 GHz (conventional).
0733-8724
506-510
Ylä-Jarkko, K.H.
aa878372-3e39-47b3-beeb-11cceb8371fa
Zervas, M.N.
1840a474-dd50-4a55-ab74-6f086aa3f701
Durkin, M.K.
37540512-83f6-4256-b839-022e1675a6d2
Barry, Ian E.
9d4dcd2f-f421-480a-a470-c78722995106
Grudinin, A.B.
8f50b467-7d60-46db-b29d-a89b1059a1d8
Ylä-Jarkko, K.H.
aa878372-3e39-47b3-beeb-11cceb8371fa
Zervas, M.N.
1840a474-dd50-4a55-ab74-6f086aa3f701
Durkin, M.K.
37540512-83f6-4256-b839-022e1675a6d2
Barry, Ian E.
9d4dcd2f-f421-480a-a470-c78722995106
Grudinin, A.B.
8f50b467-7d60-46db-b29d-a89b1059a1d8

Ylä-Jarkko, K.H., Zervas, M.N., Durkin, M.K., Barry, Ian E. and Grudinin, A.B. (2003) Power penalties due to in-band and out-of-band dispersion in FBG cascades. IEEE Journal of Lightwave Technology, 21 (2), 506-510. (doi:10.1109/JLT.2003.808763).

Record type: Article

Abstract

We measure the in-band dispersion penalty in a cascade of five 50-GHz low-dispersion linear-phase fiber Bragg gratings (FBGs) and compare the results with conventional apodised FBGs. At the 0.5-dB power penalty level, the usable bandwidth of a single linear-phase FBG (40 GHz) is twice as wide as that of a conventional apodised FBG (19 GHz). The bandwidth-utilization factor of a single linear-dispersion grating is 89%, while for the five-grating cascade, it is 76%. To our knowledge, these are the highest values reported to date for cascaded optical devices. The corresponding factors for the conventional gratings are 53% and 31%. We also measure the additional penalty on a dropped channel caused by a cascade of five adjacent-channel gratings. The bandwidth narrowing due to the adjacent-channel FBGs is 6 GHz both for linear-phase and conventional FBGs, giving a usable bandwidth of 34 GHz (linear-phase) and 13 GHz (conventional).

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More information

Published date: 15 April 2003

Identifiers

Local EPrints ID: 440838
URI: http://eprints.soton.ac.uk/id/eprint/440838
ISSN: 0733-8724
PURE UUID: 02bb6f92-cb2e-4042-a6da-c5d87708e3fc
ORCID for M.N. Zervas: ORCID iD orcid.org/0000-0002-0651-4059

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Date deposited: 20 May 2020 16:31
Last modified: 28 Apr 2022 01:35

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Contributors

Author: K.H. Ylä-Jarkko
Author: M.N. Zervas ORCID iD
Author: M.K. Durkin
Author: Ian E. Barry
Author: A.B. Grudinin

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