Title :
High-sensitivity FSK signal detection with an erbium-doped fiber preamplifier and Fabry-Perot etalon demodulation
Author :
Steele, R.C. ; Walker, G.R.
Author_Institution :
British Telecom Res. Lab., Ipswich, UK
Abstract :
A report is presented on a 622-Mb/s optical transmission system with demodulation of alternate mark invert (AMI) encoded frequency shift keying (FSK) signals by a Fabry-Perot etalon. A 25-dB gain erbium-doped fiber preamplifier gave a receiver sensitivity of -40 dBm at 10/sup -9/ BER, which was improved to -44 dBm with the addition of a narrowband optical filter. The theoretical sensitivity of the preamplified receiver and the effect of the etalon on the amplified spontaneous emission beat noise are discussed and related to experiment.<>
Keywords :
demodulation; erbium; fibre lasers; frequency shift keying; optical communication equipment; optical modulation; signal detection; 25 dB; 622 Mbit/s; Er doped fiber preamplifier; FSK signal detection; Fabry-Perot etalon demodulation; alternate mark invert encoded frequency shift keying signals; amplified spontaneous emission beat noise; narrowband optical filter; optical transmission system; receiver sensitivity; Ambient intelligence; Bit error rate; Demodulation; Fabry-Perot; Frequency shift keying; Optical filters; Optical receivers; Optical sensors; Preamplifiers; Signal detection;
Journal_Title :
Photonics Technology Letters, IEEE
