Title :
16 Gbit/s transmission experiments using a directly modulated 1.3 mu m DFB laser
Author :
Gnauck, A.H. ; Jopson, R.M. ; Burrus, C.A. ; Wang, S.-J. ; Dutta, N.K.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
Abstract :
A 16 Gb/s electrically time-division-multiplexed lightwave link is discussed. The 16 Gb/s electronic signal was generated by multiplexing together eight copies of the 2-Gb/s pseudorandom sequence (length 2/sup 15/-1) produced by a commercial BER test set. A 22-km transmission distance was achieved using a directly modulated, 1.3- mu m wavelength DFB laser and a 50- Omega p-i-n receiver. Receiver sensitivity for a BER of 10/sup -9/ was -2.0 dBm. The addition of an optical preamplifier required a more sensitive receiver to avoid saturation-induced distortion in the preamplifier. This was accomplished by reducing the 2-Gb/s word length to 24 b, thereby lowering the intersymbol interference penalty and effectively increasing the receiver sensitivity. Under these conditions, the optical preamplifier receiver sensitivity was -19 dBm, and a 64.5-km transmission was demonstrated.<>
Keywords :
digital communication systems; distributed feedback lasers; optical fibres; optical links; optical modulation; semiconductor junction lasers; time division multiplexing; 16 Gbit/s; 22 km; 64.5 km; commercial BER test set; directly modulated distributed feedback laser; electrically time-division-multiplexed lightwave link; electronic signal; intersymbol interference penalty; optical fiber communication systems; optical preamplifier receiver sensitivity; pseudorandom sequence; single-mode fiber; transmission distance; word length; Bit error rate; Electronic equipment testing; Laser noise; Optical distortion; Optical receivers; Optical saturation; Optical sensors; Preamplifiers; Random sequences; Signal generators;
Journal_Title :
Photonics Technology Letters, IEEE
