System impact of the physical length of unapodized chirped fiber Bragg gratings on dispersion compensation

It is shown, for the first time, how the group-delay ripple, due to a pair of identical unapodized dispersion compensating gratings, can be affected by a small change in the physical length of one of the gratings. It is theoretically and experimentally demonstrated that the ripple can be smoothened...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2002-01, Vol.50 (1), p.88-93
Main Authors: Rocha, M.L., Kashyap, R., Souza, R.F., Paradisi, A., Barros, M.R.X., Coral, C.
Format: Article
Language:English
Subjects:
Chirp
Circulation
Compensation
Diffraction gratings
Dispersions
Gratings
Gratings (spectra)
High speed
High speed optical techniques
Microwaves
Optical fiber dispersion
Optical fiber polarization
Optical filters
Optical refraction
Optical sensors
Optical variables control
Polarization mode dispersion
Ripples
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Summary:It is shown, for the first time, how the group-delay ripple, due to a pair of identical unapodized dispersion compensating gratings, can be affected by a small change in the physical length of one of the gratings. It is theoretically and experimentally demonstrated that the ripple can be smoothened by a slight difference in length between the gratings. The pair are arranged in a four-port optical circulator in a cascading configuration. System simulations indicate that the performance of the unapodized gratings may be improved by using such a scheme. This has implications for dispersion compensation in high-speed long-haul transmission systems.
ISSN:0018-9480
1557-9670
DOI:10.1109/22.981252