Title :
A holey fiber-based nonlinear thresholding device for optical CDMA receiver performance enhancement
Author :
Lee, J.H. ; Teh, P.C. ; Yusoff, Z. ; Ibsen, M. ; Belardi, W. ; Monro, T.M. ; Richardson, D.J.
Author_Institution :
Optoelectron. Res. Centre, Southampton Univ., UK
fDate :
6/1/2002 12:00:00 AM
Abstract :
We demonstrate the use of an optical thresholder based on a short length of holey fiber to achieve enhanced code recognition quality in a 255-chip 320-Gchip/s superstructured fiber Bragg grating-based optical code-division multiple access code:decode system. The nonlinear thresholder is based on bandpass filtering of spectrally broadened components generated by self-phase modulation and assisted by the Raman effect in an 8.7 m length of highly nonlinear holey fiber. Error free penalty free system performance is obtained with complete recovery of the original input pulse shape.
Keywords :
Bragg gratings; band-pass filters; code division multiple access; decoding; optical fibre communication; optical fibres; optical logic; optical receivers; pattern recognition; self-phase modulation; threshold elements; 255-chip 320-Gchip/s superstructured fiber Bragg grating-based optical code-division multiple access code:decode system; 8.7 m; Raman effect; bandpass filtering; enhanced code recognition quality; error free penalty free system performance; highly nonlinear holey fiber; holey fiber-based nonlinear thresholding device; optical CDMA receiver performance enhancement; optical thresholder; pulse shape; self-phase modulation; short holey fiber length; spectrally broadened components; Band pass filters; Fiber nonlinear optics; Holey fibers; Multiaccess communication; Nonlinear optical devices; Optical devices; Optical fiber devices; Optical filters; Optical modulation; Optical pulse shaping;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.1003123
