Title :
Low-chirp, 2.5 Gbit/s directly modulated fiber grating laser for WDM networks
Author :
Timofeev, F.N. ; Bayvel, Polina ; Mikhailov, V. ; Gambini, P. ; Wyatt, R. ; Kashyap, Rekha ; Robertson, Martin ; Campbell, R.J. ; Midwinter, J.E.
Author_Institution :
Dept. of Electron. Eng., Univ. Coll. London
Abstract :
Densely spaced wavelength-routed optical transport and access networks will require low-cost, stable, low-chirp narrow linewidth lasers operating on precisely specified wavelengths. Directly modulated semiconductor lasers with short external fiber gratings (FGL) can optimally satisfy these requirements. Although 10-Gbit/s externally modulated soliton transmission using a mode-locked FGL over 27,000 km was reported, wavelength chirp and transmission performance of directly modulated FGLs have not been investigated at bit rates higher than 155 Mbit/s for NRZ transmission. In this paper, we report on the very low chirp performance of a directly modulated FGL at 2.5 Gbit/s. Transmission over distances of >300 km in standard fiber and >10,000 km in dispersion-shifted fiber was demonstrated
Keywords :
chirp modulation; fibre lasers; optical communication equipment; optical fibre subscriber loops; optical modulation; wavelength division multiplexing; 10000 km; 2.5 Gbit/s; 300 km; NRZ transmission; WDM networks; densely spaced wavelength-routed networks; directly modulated fiber grating laser; dispersion-shifted fiber; external resonator; low-chirp narrow linewidth lasers; optical access networks; recirculating fiber loop; semiconductor lasers; short external fiber gratings; standard fiber; very low chirp performance; Bit rate; Chirp modulation; Fiber gratings; Fiber lasers; Laser mode locking; Laser stability; Optical fiber networks; Optical modulation; Optical solitons; Semiconductor lasers;
Conference_Titel :
Optical Fiber Communication. OFC 97., Conference on
Conference_Location :
Dallas, TX
Print_ISBN :
1-55752-480-7
DOI :
10.1109/OFC.1997.719905
