Frequency control techniques in coherent multichannel LAN's |
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| Authors: | Ohshima S. Nakamura M.S. Baba S. Tomioka T. Miyachi M. Shimomura Y. |
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| Affiliation: | Res. & Dev. Center, Toshiba Corp., Kawasaki ; |
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| 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 |
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