Title :
1.2 Gb/s closely-spaced FDMA-FSK direct-detection star network
Author :
Willner, A.E. ; Kaminow, I.P. ; Kuznetsov, M. ; Stone, J. ; Stulz, L.W.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
fDate :
3/1/1990 12:00:00 AM
Abstract :
For the frequency-division-multiple-access-frequency-shift-keying (FDMA-FSK) network, the FSK signal is converted to amplitude-shift-keyed (ASK) format by a tunable fiber Fabry-Perot (FFP) filter that acts simultaneously as a demodulator and demultiplexer. Frequency-tunable two-electrode distributed-feedback (DFB) laser transmitters produce distorted FSK spectra due to nonuniform FM response for modulation frequencies above approximately 200 Mb/s. The frequency-domain properties of the laser are related directly to the time-domain properties of the transmitted data stream. The critical dependence on the FFP passband width and center frequency location for undistorted signal recovery is shown. By optimizing these parameters, the data transmission rate can be increased while keeping the power penalty due to signal distortion below 1 dB.<>
Keywords :
distributed feedback lasers; frequency division multiple access; frequency shift keying; optical links; 1.2 Gbit/s; FFP passband width; FSK signal; amplitude shift keyed format; center frequency location; closely-spaced FDMA-FSK direct-detection star network; data transmission rate; demodulator; demultiplexer; frequency tunable two electrode distributed feedback laser; frequency-division-multiple-access-frequency-shift-keying; frequency-domain properties; modulation frequencies; nonuniform FM response; power penalty; signal distortion; time-domain properties; transmitted data stream; tunable fiber Fabry-Perot filter; undistorted signal recovery; Amplitude shift keying; Demodulation; Fabry-Perot; Fiber lasers; Filters; Frequency conversion; Frequency modulation; Frequency shift keying; Laser noise; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
