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Design and Characterization of a 20 Gbit/s Clock Recovery Circuit
P. Monteiro; J. N. Matos; A. Gameiro; P. A. Matos; J. F. da RochaIn this communication we report the design of a clock recovery circuit produced for the 20 Gbit/s demonstrator of the RACE 2011 project "TRAVEL" of the European Community. The clock recovery circuit is based on an open loop structure using a dielectric resonator narrow bandpass filter with high Q.A detailed electrical characterization of the circuit and alsoits sensitivity to temperatur...
EDFA Gain Flattening Using Long-Period Fibre Gratings Based on the Electric Arc...
O. Frazão; G. Rego; M. Lima; A. Teixeira; F. M. Araújo; P. André; J. F. da Rocha; Henrique SalgadoWe have flattened the gain spectrum of a commercial Erbium-doped fibre amplifier, obtaining a curve with approximately 3 dB of ripple, from 1524 nm to 1551 nm, using long-period fibre gratings as equalising optical filters. The fabrication principle of the long-period fibre grating is based on the electric arc technique.
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