Title :
Suppression of WDM interference for error-free detection of ultrashort-pulse CDMA signals in spectrally overlaid hybrid WDM-CDMA operation
Author :
Shen, S. ; Weiner, A.M.
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
We demonstrated the complete suppression of wavelength division multiplexing (WDM) interference for the error-free detection of ultrashort-pulse code division multiple access (CDMA) signals in spectrally overlaid optical WDM-CDMA hybrid operation by the use of narrowband spectral notch filters in the CDMA decoder and a fiber nonlinear thresholder. Our experimental results show the feasibility of CDMA detection in a scheme where WDM channels are overlaid on CDMA channels in the same spectral region.
Keywords :
code division multiple access; high-speed optical techniques; interference suppression; notch filters; optical fibre networks; optical filters; optical receivers; optical signal detection; wavelength division multiplexing; CDMA decoder; WDM interference; error-free detection; fiber nonlinear thresholder; narrowband spectral notch filters; spectrally overlaid hybrid WDM-CDMA operation; ultrashort-pulse CDMA signals; ultrashort-pulse code division multiple access; wavelength division multiplexing; Arrayed waveguide gratings; Fiber nonlinear optics; Interference suppression; Multiaccess communication; Narrowband; Optical crosstalk; Optical filters; Optical pulse shaping; Ultrafast optics; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
