Title :
Frequency control techniques in coherent multichannel LAN´s
Author :
Ohshima, Shigeru ; Nakamura, Mitsuko S. ; Baba, Shin-ichi ; Tomioka, Tazuko ; Miyachi, Masahide ; Shimomura, Yasuhiko
Author_Institution :
Res. & Dev. Center, Toshiba Corp., Kawasaki, Japan
fDate :
9/1/1995 12:00:00 AM
Abstract :
This paper describes frequency control techniques for cold start and channel recognition functions in coherent multichannel local area networks. A Z-cut quartz etalon can be used to stabilize the optical transmitter frequencies. The capture range and the influence of humidity on a Fabry-Perot etalon are discussed. The frequency deviation of the optical transmitter was estimated to be less than ±1 GHz in the long term. A double AFC loop has been proposed for local LD frequency control. It showed a wide capture range of ±100 GHz. Coherent FDM receiver switching to the desired channel was demonstrated over a range from 0 to 40°C in an experiment
Keywords :
Fabry-Perot interferometers; automatic frequency control; optical fibre LAN; optical transmitters; 0 to 40 C; Fabry-Perot etalon; Z-cut quartz etalon; capture range; channel recognition functions; coherent FDM receiver switching; coherent multichannel LAN´s; coherent multichannel local area networks; cold start; desired channel; double AFC loop; frequency control techniques; frequency deviation; humidity; local LD frequency control; optical transmitter; optical transmitter frequencies stabilisation; wide capture range; Fabry-Perot; Frequency control; Frequency division multiplexing; Frequency shift keying; Local area networks; Optical control; Optical receivers; Optical sensors; Optical transmitters; Optical variables control;
Journal_Title :
Lightwave Technology, Journal of
Conference_Location :
9/1/1995 12:00:00 AM
