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A dispersionless and bandwidth-adjustable FBG filter for reconfigurable 2R-regeneration

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4 Author(s)
Rochette, M. ; Centre for Ultrahigh Bandwidth Devices for Opt. Syst., Univ. of Sydney, NSW, Australia ; Littler, I.C.M. ; McKerracher, R.W. ; Eggleton, B.J.

We present a bandwidth-adjustable filter that enables reconfiguration of the bit rate of optical subsystems. This filter is bandwidth-adjustable, wavelength-tunable, and maintains zero dispersion as the bandwidth and wavelength are varied. It also has a transmission spectrum which is Gaussian, to shape Gaussian pulses in the time domain. The ability of the bandwidth-adjustable filter to enable bit-rate reconfiguration is demonstrated in an optical regenerator based on self-phase modulation. The bandwidth-adjustable filter replaces the fixed-bandwidth filter usually used in this kind of regenerator, and enables optical regeneration at both 40 and 80 Gb/s.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 8 )