Title :
Photonic generation of tunable multi-frequency microwave source
Author :
Gao, Smith ; Gao, Yuan ; He, Shunfan
Author_Institution :
State Key Lab. of Modern Opt. Instrum., Zhejiang Univ., Hangzhou, China
Abstract :
A flexibly tunable multi-frequency microwave source is presented based on optical heterodyning between the intensity-modulated optical carrier (incorporated four-wave mixing equalisation and stabilisation) and the frequency-shifted Stokes light generated by fibre stimulated Brillouin scattering. About 20 microwave frequencies centred at 10.77 or 21.62 GHz are experimentally observed. The central frequency and the frequency spacing of the multi-frequency microwave source can be freely tuned by changing the frequency shift of the beating optical waves and the driving frequency on the modulator.
Keywords :
Brillouin spectra; heterodyne detection; multiwave mixing; optical communication; beating optical waves; central frequency; driving frequency; fibre stimulated Brillouin scattering; four-wave mixing equalisation; frequency 10.77 GHz; frequency 21.26 GHz; frequency shift; frequency spacing; frequency-shifted Stokes light; intensity-modulated optical carrier; optical heterodyning; photonic generation; tunable multi-frequency microwave source;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.2876
