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Rapidly reconfigurable optical phase encoder-decoders based on fiber Bragg gratings

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6 Author(s)
Zhaowei Zhang ; Optoelectron. Res. Centre, Univ. of Southampton, UK ; Chun Tian ; M. R. Mokhtar ; P. Petropoulos
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We demonstrate the capacity for fast dynamic reconfiguration of optical code-division multiple access (OCDMA) phase en/decoders based on fiber Bragg gratings and a thermal phase-tuning technique. The tuning time between two different phase codes is measured to be less than 2 s. An OCDMA system using tunable-phase decoders is compared with a system using fixed-phase decoders and, although the system using fixed-phase decoders exhibits a shorter output autocorrelation pulsewidth and lower sidelobes, the system using tunable-phase decoders has advantages of flexibility and a more relaxed requirement on the input pulsewidth

Published in:

IEEE Photonics Technology Letters  (Volume:18 ,  Issue: 11 )