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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 21, Iss. 2 — Feb. 1, 2003
  • pp: 506–

Power Penalties Due to In-Band and Out-of-Band Dispersion in FBG Cascades

K. H. Ylä-Jarkko, M. N. Zervas, M. K. Durkin, I. Barry, and A. B. Grudinin

Journal of Lightwave Technology, Vol. 21, Issue 2, pp. 506- (2003)


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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).

[IEEE ]

Citation
K. H. Ylä-Jarkko, M. N. Zervas, M. K. Durkin, I. Barry, and A. B. Grudinin, "Power Penalties Due to In-Band and Out-of-Band Dispersion in FBG Cascades," J. Lightwave Technol. 21, 506- (2003)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-21-2-506

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