%0 Journal Article
%T Study on the Technique of Brillouin Scattering Distributed Optical Fiber Sensing Based on Hilbert transform<br>希尔伯特变换处理的布里渊散射DOFS的研究
%A 宋牟平
%A 赵斌
%J 光子学报
%D 2005
%I 
%X The scattering optical signal of BOTDR based on Brillouin scattering distributed sensor is very weak and have a frequency width of several decades megahertz, so it is hard to perform the traditional coherent demodulation. A optical heterodyne detection based on Hilbert transform is presented here. In detail,Brillouin back-scattering light is heterodyne detected with the reference right which is modulated by microwave electric optical modulator to produce frequency-adjustable light, then the detected photoelectric signal is demodulated using Hilbert transform. At last the distributed sensing signal with better S/N ratio is gained, which can enhance the performance of the sensor.
%K Optical fiber sensor
%K Brillouin scattering
%K Hilbert transform
%K Heterodyne detect<br>光纤传感器
%K 布里渊散射
%K 希尔伯特变换
%K 相干检测
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=C5C06970F2FA14EF&yid=2DD7160C83D0ACED&vid=339D79302DF62549&iid=9CF7A0430CBB2DFD&sid=F016DE22306D4D4A&eid=09002DF587B7129E&journal_id=1004-4213&journal_name=光子学报&referenced_num=3&reference_num=17