Title :
Dispersion penalty reduction using an optical modulator with adjustable chirp
Author :
Gnauck, A.H. ; Korotky, S.K. ; Veselka, J.J. ; Nagel, J. ; Kemmerer, C.T. ; Minford, W.J. ; Moser, D.T.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
Abstract :
Using a unique Ti:LiNbO/sub 3/ modulator, the value of the modulation chirp parameter that minimizes the transmission power penalty caused by fiber chromatic dispersion was experimentally identified. System experiments at 5 Gb/s using nonreturn-to-zero (NRZ) amplitude-shift-keyed (ASK) transmission with direct detection reception are discussed, and the optimum values of the modulation chirp parameter versus distance for transmission at 1.5 mu m wavelength over fibre having zero dispersion at 1.3 mu m are identified. 5 Gb/s NRZ transmission was achieved through distances of 128, 192, and 256 km of conventional fiber while incurring dispersion penalties of -0.5, 0.1, and 1.1 dB respectively, by operating at the quantum chirp value.<>
Keywords :
amplitude modulation; electro-optical devices; lithium compounds; optical communication equipment; optical dispersion; optical fibres; optical modulation; titanium; 1.3 micron; 1.5 micron; 5 Gbit/s; LiNbO/sub 3/:Ti modulator; adjustable chirp; direct detection reception; dispersion penalties; distance; fiber chromatic dispersion; modulation chirp parameter; nonreturn to zero amplitude shift keyed transmission; optical modulator; quantum chirp; transmission power penalty; wavelength; zero dispersion; Amplitude modulation; Chirp modulation; Fiber lasers; Frequency; Optical fiber couplers; Optical fiber devices; Optical modulation; Optical pulse compression; Optical transmitters; Optical waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
