Title :
Performance of 10 Gb/s lightwave systems using a adjustable chirp optical modulator and linear equalization
Author :
Cartledge, J.C. ; McKay, R.G.
Author_Institution :
Dept. of Electr. Eng., Queen´´s Univ., Kingston, Ont., Canada
Abstract :
An optical modulator with an adjustable chirp parameter and a synchronous tapped delay line equalizer can be combined to offer a low dispersion penalty for 10 Gb/s systems operating at a wavelength of 1.55 mu m with standard single-mode optical fiber. The influence of important system parameters, such as the modulator bandwidth, chirp parameter, and number of equalizer taps, on the receiver sensitivity is assessed for smart receivers which jointly optimize the decision time, decision threshold, and tap weights under a minimum bit-error-ratio criterion. The combination of an adjustable chirp modulator and equalizer offers a system reach more than twice that obtained with a chirp-free modulator.<>
Keywords :
electro-optical devices; optical dispersion; optical links; optical modulation; optical receivers; sensitivity; 1.55 micron; 10 Gbit/s; IR; adjustable chirp optical modulator; adjustable chirp parameter; decision threshold; decision time; electro-optical modulators; equalizer taps; lightwave systems; linear equalization; low dispersion penalty; minimum bit-error-ratio criterion; modulator bandwidth; receiver sensitivity; smart receivers; standard single-mode optical fiber; synchronous tapped delay line equalizer; system parameters; tap weights; Chirp modulation; Equalizers; Optical filters; Optical modulation; Optical pulse compression; Optical receivers; Optical refraction; Optical sensors; Optical signal processing; Optical transmitters;
Journal_Title :
Photonics Technology Letters, IEEE
