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

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6 Author(s)
Rocha, M.L. ; CPqD Found., Sao Paulo, Brazil ; Kashyap, R. ; Souza, R.F. ; Paradisi, A.
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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

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:50 ,  Issue: 1 )