Title :
Combined frequency and amplitude modulation for the STARNET WDM computer communication network
Author :
Hickey, Michael ; Kazovsky, Leonid
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., CA, USA
Abstract :
STARNET is an experimental wavelength-division multiplexed computer communication network that makes use of combined modulation of a single transmitter laser to implement a virtual-ring control sub-network and a reconfigurable high-speed sub-network over a passive star architecture. In this letter, we demonstrate a new technique of combined modulation that works by direct frequency-shift keyed (FSK) modulation and external amplitude-shift keyed (ASK) modulation of a semiconductor laser. By adjusting the amplitude modulation depth to 0.8, both the 125 Mb/s ASK receiver and the 1.244 Gb/s FSK receiver operate with equal bit-error ratios less than 10/sup -9/ for a received signal power of -24 dBm.<>
Keywords :
amplitude shift keying; computer networks; frequency shift keying; optical fibre LAN; optical modulation; optical receivers; optical transmitters; wavelength division multiplexing; 1.244 Gbit/s; 125 Mbit/s; ASK; ASK receiver; FSK; FSK receiver; STARNET WDM computer communication network; amplitude modulation; amplitude modulation depth; direct frequency-shift keyed FSK modulation; equal bit-error ratios; external amplitude-shift keyed ASK modulation; frequency modulation; passive star architecture; received signal power; reconfigurable high-speed sub-network; semiconductor laser; virtual-ring control sub-network; wavelength-division multiplexed computer communication network; Amplitude modulation; Amplitude shift keying; Communication networks; Communication system control; Computer networks; Frequency shift keying; Optical control; Semiconductor lasers; Transmitters; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
