Title :
A 1.7 Gb/s ASK and a 622 Mb/s incoherent FSK transmission experiment using a 1.55- mu m multiquantum well distributed feedback laser
Author :
Wang, S.J. ; Kuo, C.Y. ; Parayanthal, P. ; Shen, T.M. ; Melley, M.P. ; Hartman, R.L.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
Abstract :
A multiple-quantum-well distributed-feedback (MQW-DFB) laser with narrow linewidth and low frequency chirp at low output power may experience linewidth rebroadening at high output power. the rebroadening is mostly due to a large carrier-induced change of refractive index, which also causes a large frequency modulation response for the MQW-DFB lasers. Using a 1.55- mu m MQW-DFB laser, a 622-Mb/s amplitude-shift-keying (ASK) transmission experiment employing 200-km of fiber and an erbium-doped fiber amplifier has been demonstrated having a dispersion power penalty less than 9.8 dB. The receiver sensitivities at BER=10/sup -9/ of the ASK system are -34.5 dBm and -42.5 dBm for 1.7-Gb/s and 622-Mb/s modulation, respectively. A 622-Mb/s incoherent frequency-shift-keying (FSK) transmission experiment using the same laser has also achieved a receiver sensitivity of -42.5 dBm.<>
Keywords :
amplitude modulation; distributed feedback lasers; frequency shift keying; optical communication equipment; optical links; optical modulation; semiconductor junction lasers; 1.55 micron; 1.7 Gbit/s; 200 km; 622 Mbit/s; Er:fibre amplifier; MQW-DFB laser; amplitude-shift-keying; bit-error-rates; carrier-induced refractive index changes; dispersion power penalty; high output power; incoherent FSK transmission experiment; large frequency modulation response; linewidth rebroadening; low frequency chirp; low output power; multiquantum well distributed feedback laser; narrow linewidth; receiver sensitivities; Amplitude shift keying; Chirp; Erbium-doped fiber lasers; Frequency shift keying; Laser transitions; Power amplifiers; Power generation; Power lasers; Quantum well devices; Refractive index;
Journal_Title :
Photonics Technology Letters, IEEE
