The effect of grating‐position deviation and fiber dispersion in the fiber‐optic–CDMA network with the FBG encoder/decoder for incoherent 2D coding

Abstract

The effect of grating‐position deviation (GPD) and fiber dispersion in a fiber‐optic–CDMA network with a FBG encoder/decoder for incoherent 2D coding are studied here. For error‐free transmission, the GPD‐caused maximum optical pulse‐position deviation (PPD) must be below Δm, and the transmission distance must be below Lm. A modified encoder/decoder configuration is proposed to compensate for the fiber dispersion. With this proposed encoder/decoder, the user's distances in a network can be improved to L ± Lm. Error‐free transmission has been achieved through 9.5‐km SMF in the experiment with this design. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 16–19, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10504

A novel chirp‐coded en/decoder for coherent 2D time‐wavelength OCDMA systems

“…Recently, several two-dimensional (2D) time-spreading wavelength-hopping optical code-division multiple-access (OCDMA) techniques [1][2][3][4][5][6] have been proposed and demonstrated to offer flexible solutions for enhancing the performances of optical access networks. 2D en/decoders are commonly realized by a combination of AWG devices and fiber-optic delay lines [1] or an array of fiber Bragg gratings (FBGs) [2,3,5].…”