Title :
Simplified model of an FSK-to-ASK direct-detection system using a Fabry-Perot demodulator
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
fDate :
5/1/1990 12:00:00 AM
Abstract :
Design guidelines are presented for a direct-detection optical transmission system in which an FSK (frequency-shift-keyed) signal is converted to ASK (amplitude-shift-keyed format) by a tunable Fabry-Perot filter demodulator/demultiplexer. The analysis gives an estimated set of conditions for the proper Fabry-Periot (FP) bandwidth and tone frequency deviation that reduces the system power penalities. This is accomplished by calculating the tonal power transmitted through the FP; this simplifying assumption neglects pattern dependences but provides a simple, useful expression for predicting regions of rapidly increasing power penalties. The generated curves agree well with experimental results for three different systems.<>
Keywords :
amplitude modulation; frequency shift keying; multiplexing; optical communication equipment; optical filters; optical modulation; tuning; FSK-to-ASK direct-detection system; Fabry-Perot bandwidth; Fabry-Perot demodulator; Fabry-Perot filter demultiplexer; amplitude-shift-keyed; direct-detection optical transmission system; frequency-shift-keyed; pattern dependences; system power penalities; tonal power; tone frequency; tunable Fabry-Perot filter demodulator; Amplitude shift keying; Fabry-Perot; Frequency conversion; Frequency estimation; Frequency shift keying; Guidelines; Optical design; Optical filters; Optical frequency conversion; Signal design;
Journal_Title :
Photonics Technology Letters, IEEE
