Asynchronous multi-user coherent OCDMA System with code-shifted-keying and balanced detection
- Title :
Asynchronous multi-user coherent OCDMA System with code-shifted-keying and balanced detection
- Author :
X. Wang, N. Wada, T. Miyazaki, G. Cincotti, and K. Kitayama
- Journal :
IEEE J. Selected Topics of Quantum Electron., vol.13, No.5, pp.1463-1470, 2007.
- Abstract :
An optical-code-division-multiple-access (OCDMA) system with coherent coding, code-shifted-keying (CSK) data
modulation, and balanced detection (CSK-OCDMA) is proposed and theoretically investigated in this paper. The
proposed scheme has better multi-user capability, simpler threshold setting in the receiver and, particularly
enhanced security compares with conventional OCDMA systems. A multi-user CSK-OCDMA system with 511-chip
superstructure fiber Bragg gratings and a multi-port encoder/decoder (E/D) pair was experimentally demonstrated.
A bit-error-rate of less than 10-9 was achieved with up to 10 and 8 active users at data rates of 1.25 Gbit/s
and 10.7 Gbit/s, respectively, without any forward-error-correction or optical thresholding. The E/D was
used in a novel configuration to process multi-dimentional optical codes.
- Keywords :
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