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

Content Provider	IEEE Xplore Digital Library
Author	Chao Wang Jianping Yao
Copyright Year	1989
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.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	882
Ending Page	884
Page Count	3
File Size	237955
File Format	PDF
ISSN	10411135
Volume Number	20
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microwave generation Pulse generation Chirp Optical pulse generation Optical pulse shaping Frequency Optical filters Ultrafast optics Microwave devices High speed optical techniques radar Chirped fiber Bragg grating chirped microwave pulse pulse compression
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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