An Unbalanced Temporal Pulse-Shaping System for Chirped Microwave Waveform Generation

Li, Ming and Wang, Chao and Li, Wangzhe and Yao, Jianping (2010) An Unbalanced Temporal Pulse-Shaping System for Chirped Microwave Waveform Generation. IEEE Transactions on Microwave Theory and Techniques, 58 (11). pp. 2968-2975. ISSN 0018-9480. (doi:https://doi.org/10.1109/TMTT.2010.2079070) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1109/TMTT.2010.2079070

Abstract

An unbalanced temporal pulse-shaping (TPS) system for chirped microwave waveform generation is proposed and demonstrated. The proposed system consists of an ultrashort pulsed source, a Mach-Zehnder modulator and two dispersive elements. The dispersions of the two dispersive elements are opposite in sign, but not identical in magnitude. The entire system is equivalent to a conventional balanced TPS system with two complementary dispersive elements for real-time Fourier transformation and a third dispersive element to achieve a second real-time Fourier transformation. The key contribution of this work is that the third-order dispersion of the dispersive elements is considered, which leads to the generation of a frequency-chirped microwave waveform. A theoretical analysis is performed in which a mathematical model that relates the second- and third-order dispersion of the dispersive elements and the chirp rate of the generated microwave waveform is developed. The theoretical model is then verified by numerical simulations and an experiment. A chirped microwave waveform with different chirp rates of -0.0535 and 0.715 GHz/ns by tuning the third-order dispersion using a tunable chirped fiber Bragg grating is experimentally demonstrated. An unbalanced temporal pulse-shaping (TPS) system for chirped microwave waveform generation is proposed and demonstrated. The proposed system consists of an ultrashort pulsed source, a Mach-Zehnder modulator and two dispersive elements. The dispersions of the two dispersive elements are opposite in sign, but not identical in magnitude. The entire system is equivalent to a conventional balanced TPS system with two complementary dispersive elements for real-time Fourier transformation and a third dispersive element to achieve a second real-time Fourier transformation. The key contribution of this work is that the third-order dispersion of the dispersive elements is considered, which leads to the generation of a frequency-chirped microwave waveform. A theoretical analysis is performed in which a mathematical model that relates the second- and third-order dispersion of the dispersive elements and the chirp rate of the generated microwave waveform is developed. The theoretical model is then verified by numerical simulations and an experiment. A chirped microwave waveform with different chirp rates of -0.0535 and 0.715 GHz/ns by tuning the third-order dispersion using a tunable chirped fiber Bragg grating is experimentally demonstrated.

Item Type: Article
Uncontrolled keywords: INSPEC: CONTROLLED INDEXING Bragg gratings Fourier transforms chirp modulation microwave generation modulators pulse shaping INSPEC: NON CONTROLLED INDEXING Mach-Zehnder modulator TPS system chirp rate dispersive element frequency-chirped microwave waveform generation mathematical model real-time Fourier transformation third-order dispersion tunable chirped fiber Bragg grating ultrashort pulsed source unbalanced temporal pulse-shaping system AUTHOR KEYWORDS Chirped microwave waveform generation high-order dispersion microwave frequency multiplication real-time Fourier transform temporal pulse shaping (TPS) IEEE TERMS Chirp Dispersion Masers Microwave photonics Modulation Optical pulses INSPEC: CONTROLLED INDEXING Bragg gratings Fourier transforms chirp modulation microwave generation modulators pulse shaping INSPEC: NON CONTROLLED INDEXING Mach-Zehnder modulator TPS system chirp rate dispersive element frequency-chirped microwave waveform generation mathematical model real-time Fourier transformation third-order dispersion tunable chirped fiber Bragg grating ultrashort pulsed source unbalanced temporal pulse-shaping system AUTHOR KEYWORDS Chirped microwave waveform generation high-order dispersion microwave frequency multiplication real-time Fourier transform temporal pulse shaping (TPS) IEEE TERMS Chirp Dispersion Masers Microwave photonics Modulation Optical pulses
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Faculties > Sciences > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: Tina Thompson
Date Deposited: 28 Oct 2013 14:28 UTC
Last Modified: 28 Oct 2013 14:28 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/35710 (The current URI for this page, for reference purposes)
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