Ultra-Wideband Waveform Generator Based on Optical Pulse-Shaping and FBG Tuning

We propose and demonstrate experimentally a prototype for ultra-wideband (UWB) waveform generator based on optical pulse shaping. The time-domain pulse shape is written in the frequency domain, and a single-mode fiber performs frequency-to-time conversion. A U.S. Federal Communications Commission (F...

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Bibliographic Details
Published in:IEEE photonics technology letters 2008-01, Vol.20 (2), p.135-137
Main Authors: Abtahi, M., Mirshafiei, M., Magne, J., Rusch, L.A., LaRochelle, S.
Format: Article
Language:English
Subjects:
Balanced detection
Bragg gratings
fiber Bragg grating (FBG)
Fiber gratings
Fibers
Frequency domains
Gaussian
Optical filters
Optical pulse generation
Optical pulse shaping
Optical pulses
Optical tuning
Pulse measurements
Pulse shape
Shape
Signal generators
spectral pulse shaping
Tuning
Ultra wideband technology
ultra-wideband (UWB)
Waveform generators
Waveforms
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Summary:We propose and demonstrate experimentally a prototype for ultra-wideband (UWB) waveform generator based on optical pulse shaping. The time-domain pulse shape is written in the frequency domain, and a single-mode fiber performs frequency-to-time conversion. A U.S. Federal Communications Commission (FCC)-compliant power efficient pulse shape is inscribed in the frequency domain by a fiber Bragg grating (FBG) with an excellent match between optimized and measured pulses. Two other popular UWB pulse shapes (Gaussian monocycle and doublet pulses) are achieved by proper tuning of two FBG-based variable optical filters. A balanced photodetector removes an unwanted rectangular pulse superimposed on the desired waveform, assuring compliance at low frequency.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2007.912523