Large Time-Bandwidth Product Microwave Arbitrary Waveform Generation Using a Spatially Discrete Chirped Fiber Bragg Grating

Wang, Chao and Yao, Jianping (2010) Large Time-Bandwidth Product Microwave Arbitrary Waveform Generation Using a Spatially Discrete Chirped Fiber Bragg Grating. Journal of Lightwave Technology, 28 (11). pp. 1652-1660. ISSN 0733-8724. (doi:https://doi.org/10.1109/JLT.2010.2047093) (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/JLT.2010.2047093

Abstract

We propose and experimentally demonstrate an approach to generating large time-bandwidth product (TBWP) microwave arbitrary waveforms based on optical pulse shaping using a single spatially discrete chirped fiber Bragg grating (SD-CFBG). The SD-CFBG functions to perform simultaneously spectral slicing, frequency-to-time mapping, and temporal shifting of the input optical pulse, which leads to the generation of an optical pulse burst with the individual pulses in the burst temporally spaced by the time delays determined by the SD-CFBG. With the help of a bandwidth-limited photodetector (PD), a smooth microwave waveform is obtained. The SD-CFBG is fabricated using a linearly chirped phase mask by axially shifting the photosensitive fiber to introduce a spatial spacing between two adjacent sub-gratings during the fabrication process. By properly designing the fiber shifting function, a large TBWP microwave arbitrary waveform with the desired frequency chirping or phase coding can be generated. An equation that relates the fiber shifting function and the microwave waveform frequency chirping is derived. The photonic generation of large TBWP microwave waveforms with a linear, nonlinear and stepped frequency chirping is experimentally demonstrated.

Item Type: Article
Uncontrolled keywords: INSPEC: CONTROLLED INDEXING Bragg gratings chirp modulation delay estimation microwave generation microwave photonics optical design techniques optical fibre fabrication optical modulation optical pulse generation optical pulse shaping phase coding photodetectors pulse frequency modulation spectral line shift INSPEC: NON CONTROLLED INDEXING bandwidth-limited photodetector fiber shifting function frequency-to-time mapping large time-bandwidth product microwave arbitrary waveform generation linearly chirped phase mask microwave waveform linear frequency chirping microwave waveform nonlinear frequency chirping microwave waveform stepped frequency chirping optical design optical fabrication optical pulse burst optical pulse shaping phase coding photosensitive fiber smooth microwave waveform spatial spacing spatially discrete chirped fiber Bragg grating spectral slicing temporal shifting time delays AUTHOR KEYWORDS Chirp dispersion fiber Bragg grating microwave photonics optical pulse shaping phase coding pulse compression radar time-bandwidth product
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 14:47 UTC
Last Modified: 11 Jun 2014 09:48 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/35714 (The current URI for this page, for reference purposes)
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