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A Power-Efficient Ultra-Wideband Pulse Generator Based on Multiple PM-IM Conversions

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4 Author(s)
Enbo Zhou ; Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China ; Xing Xu ; King-Shan Lui ; Wong, Kenneth Kin-Yip

A novel photonic generation of power-efficient ultra-wideband (UWB) pulse by incoherent summation of two asymmetric monocycle pulses with inverted polarities is experimentally demonstrated. The principles of multiple cross-phase modulations in a highly nonlinear fiber and multiple phase modulation to intensity modulation conversions in a commercially available arrayed-waveguide grating are used. The combined UWB pulse exploiting spectral efficiency of 50.59% in experiment is fully compliant with the Federal Communications Commission (FCC) spectral mask without power attenuation. The FCC-compliant UWB pulse gains larger than 11.5- and 6-dB improvement against monocycle and doublet pulses after power attenuation to respect the FCC spectral mask, respectively. Such a power-efficient UWB pulse with pulse duration of approximately 320 ps has potential to achieve high-speed transmission without pulse overlapping and obvious distortion.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 14 )

Date of Publication:

July15, 2010

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