Title :
Comparison of NRZ and AMI coding schemes using three-electrode and conventional DFB laser transmitters in a 636 Mbit/s SF-FSK coherent system
Author :
Hoffmann, B. ; Jensen, N.G. ; Bødtker, E. ; Nielsen, S.K. ; Broberg, B.
Author_Institution :
Copenhagen Telephone Co., Denmark
Abstract :
A comparison of AMI and NRZ coding schemes in a 636 Mbit/s SF-FSK system is performed. The system performances for a 223-1 sequence show that NRZ-coding of a three-electrode DFB transmitter laser and AMI-coding of a conventional DFB transmitter laser are comparable to within 0.5 dB. Both perform 3.5 dB better than NRZ-coding of the conventional DFB laser at a 10-9 bit error rate.
Keywords :
codes; decoding; digital communication systems; distributed feedback lasers; encoding; error statistics; frequency shift keying; optical communication equipment; semiconductor junction lasers; transmitters; 636 Mbit/s; AMI coding; BER; DFB laser transmitters; NRZ coding; SF-FSK coherent system; bit error rate; conventional laser; single filter frequency shift keying; three electrode laser;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19901225
