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Title: Switchable UWB pulse generation using a polarization maintaining fiber Bragg grating as frequency discriminator
Authors: Feng, X
Li, Z
Guan, BO
Lu, C 
Tam, HY 
Wai, PKA 
Keywords: Discriminators
Fiber Bragg gratings
Fiber optic components
Fiber optic sensors
Issue Date: 15-Feb-2010
Publisher: Optical Society of America
Source: Optics express, 15 Feb. 2010, v. 18, no. 4, p. 3643-3648 How to cite?
Journal: Optics express 
Abstract: We propose and successfully demonstrate a novel approach to optically generate ultrawideband (UWB) pulse with switchable shape and polarity by using a polarization-maintaining fiber Bragg grating (PM-FBG) as frequency discriminator. Depending on the shape of the reflective spectrum of the PM-FBG, the system can function as a first- or second-order differentiator for the generation of Gaussian UWB monocycle or doublet pulses. Consequently, the shape and the polarity of the generated UWB pulse can be switched by simple adjustment of a polarization controller (PC). Gaussian monocycle and doublet pulses were successfully obtained with fractional bandwidths of about 188% and 152%, respectively. Higher-order UWB pulses with spectrum covering from 2.9 GHz to 9.8 GHz have also been obtained through adjustment of the PC.
ISSN: 1094-4087
DOI: 10.1364/OE.18.003643
Rights: © 2010 Optical Society of America. This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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