Photonic Generation of Chirped Microwave Pulses Using Superimposed Chirped Fiber Bragg Gratings

Wang, Chao and Yao, Jianping (2008) Photonic Generation of Chirped Microwave Pulses Using Superimposed Chirped Fiber Bragg Gratings. IEEE Photonics Technology Letters, 20 (11). pp. 882-884. ISSN 1041-1135. (doi:https://doi.org/10.1109/LPT.2008.922333) (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)

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. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1109/LPT.2008.922333

Abstract

A novel approach to generating linearly chirped microwave pulses in the optical domain based on spectral shaping and linear frequency-to-time mapping is proposed and experimentally demonstrated. In the proposed system, the spectrum of a femtosecond pulse generated by a mode-locked fiber laser is spectrum-shaped by an optical filter that consists of two superimposed chirped fiber Bragg gratings (SI-CFBGs) with different chirp rates. The SI-CFBGs form a Fabry-Perot cavity with a cavity length linearly dependent on the resonance wavelength, thus a spectral response with an increased or decreased free spectral range is generated. A chirped microwave pulse with the pulse shape identical to the shaped spectrum is obtained at the output of a high-speed photodetector thanks to the frequency-to-time mapping in a dispersive device. The proposed technique is experimentally demonstrated, a linearly chirped microwave pulse with a central frequency of 15 GHz and a chirp rate of 0.0217 GHz/ps is experimentally generated.

Item Type: Article
Uncontrolled keywords: INSPEC: CONTROLLED INDEXING Bragg gratings Fabry-Perot resonators chirp modulation fibre lasers laser cavity resonators laser mode locking optical filters optical pulse generation optical pulse shaping photodetectors INSPEC: NON CONTROLLED INDEXING Fabry-Perot cavity chirped microwave pulses femtosecond pulse high-speed photodetector linear frequency-to-time mapping mode-locked fiber laser optical filter optical pulse generation optical pulse shaping photonic generation resonance wavelength spectral shaping superimposed chirped fiber Bragg gratings AUTHOR KEYWORDS Chirped fiber Bragg grating chirped microwave pulse pulse compression radar IEEE TERMS Chirp Frequency High speed optical techniques Microwave devices Microwave generation Optical filters Optical pulse generation Optical pulse shaping Pulse generation Ultrafast optics
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: 29 Oct 2013 10:42 UTC
Last Modified: 29 Oct 2013 10:42 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/35743 (The current URI for this page, for reference purposes)
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