A 320-Gb/s Capacity (32-User × 10 Gb/s) SPECTS O-CDMA Network Testbed With Enhanced Spectral Efficiency Through Forward Error Correction

Author

Hernandez, Vincent J. ; Cong, Wei ; Hu, Junqiang ; Yang, Chunxin ; Fontaine, Nicolas K. ; Scott, Ryan P. ; Ding, Zhi ; Kolner, Brian H. ; Heritage, Jonathan P. ; Yoo, S. J Ben

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Davis, CA

Volume

25

Issue

1

fYear

2007

Firstpage

79

Lastpage

86

Abstract

This paper demonstrates a high-performance optical-code-division-multiple-access (O-CDMA) network testbed using the spectral phase encoded time spreading (SPECTS) method. Through additional time and polarization multiplexing, a total of 32 10-Gb/s users are supported while sharing eight O-CDMA spreading codes. User detection is achieved with time gating and nonlinear thresholding to suppress the multiaccess interference of other users. Incorporation of forward error correction successfully reduces the performance loss imposed by coherent beat interference, resulting in error-free performance (BER<10^-11), significant per-user power penalty reduction, and the elimination of a bit-error-rate noise floor. The testbed also applies bandwidth suppression within the encoders and decoders, yielding a 52% increase in spectral efficiency

Keywords

code division multiple access; code division multiplexing; codes; decoding; error statistics; forward error correction; optical fibre losses; optical fibre networks; optical fibre polarisation; optical noise; 10 Gbit/s; 320 Gbit/s; OCDMA network testbed; OCDMA spreading codes; bandwidth suppression; bit-error-rate noise floor; coherent beat interference; decoders; encoders; error-free performance; forward error correction; multiaccess interference suppression; nonlinear thresholding; optical code division multiple access; per-user power penalty reduction; polarization multiplexing; spectral efficiency; spectral phase encoded time spreading; time gating; time multiplexing; Error correction; Forward error correction; Interference elimination; Interference suppression; Noise reduction; Nonlinear optics; Optical fiber networks; Optical polarization; Performance loss; Testing; Forward error correction (FEC); multiaccess communication; o ptical code division multiaccess (O-CDMA); optical fiber communication; phase coding;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2006.888927

Filename

4137589