Abstract

We demonstrate that a single fiber Bragg grating (FBG)-based optical add-drop multiplexer can be used to improve the optical spectral efficiency in a mm-wave WDM-fiber wireless network. The technique employs wavelength interleaving in conjunction with optical single-sideband modulation,together with a single multiphase-shifted fiber Bragg grating. Wavelength optical add-drop features are also demonstrated using the grating, and our results show the performance of the novel grating in terms of channel isolation and add-drop functionality. We perform simulations to optimize placement of the phase shifts when an apodization profile is applied to the grating, in an attempt to minimize in-band and out-of-band transmission-amplitude ripples. Experiments are performed using cascade configurations both with the apodized gratings with optimal phase-shift positions and with the original unoptimized gratings. The experimental results demonstrate how these novel gratings can be used in fiber-radio networks incorporating multiple optical add-drop multiplexers.

[IEEE ]

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References

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  1. R. Zengerle and O. Leminger, "Phase-shifted Bragg-grating filters with improved transmission characteristics", J. Lightwave Technol., vol. 13, pp. 2354-2358, 1995.
  2. L. Wei and J. Lit, "Phase-shifted Bragg grating filters with symmetrical structures", J. Lightwave Technol., vol. 15, pp. 1405-1409, 1997.
  3. F. Bakhti and P. Sansonetti, "Design and realization of multiple quarter-wave phase-shifts UV-written bandpass filters in optical fibers", J. Lightwave Technol., vol. 15, pp. 1433-1437, 1997.

J. Lightwave Technol. (3)

R. Zengerle and O. Leminger, "Phase-shifted Bragg-grating filters with improved transmission characteristics", J. Lightwave Technol., vol. 13, pp. 2354-2358, 1995.

L. Wei and J. Lit, "Phase-shifted Bragg grating filters with symmetrical structures", J. Lightwave Technol., vol. 15, pp. 1405-1409, 1997.

F. Bakhti and P. Sansonetti, "Design and realization of multiple quarter-wave phase-shifts UV-written bandpass filters in optical fibers", J. Lightwave Technol., vol. 15, pp. 1433-1437, 1997.

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