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Temperature-calibrated fiber-optic refractometer based on acompact FBG-SMS structure

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【Author】 Qiangzhou Rong1 ,Xueguang Qiao 1 ,Tuan Guo 2 Ruohui Wang 1 ,Jing Zhang 1 ,Manli Hu 1 ,Zhongyao Feng 1 , Yinyan Weng1,and Yue Ma 11 Department of Physics,Northwest University,Xi’an 710069,China 2 Institute of Photonics Technology,Jinan University,Guangzhou 510632,China

【机构】 Department of Physics,Northwest University； Institute of Photonics Technology,Jinan University；

【摘要】 A novel all-fiber temperature-calibrated refractometer based on a compact fiber Bragg grating(FBG) single-multi-single(SMS)structure is proposed and experimentally demonstrated.The sensor head is composed of a FBG combined with a SMS structure,in which the middle multimode fiber(MMF)section is etched by a time-controlled hydrofluoric.The transmission dip of SMS is extremely sensitive to ambient refractive index(RI)variation,whereas the upstream FBG provides the necessary temperature information for RI calibration.All aforementioned functions are performed via a compact FBG-SMS structure not longer than 25 mm.The proposed sensing device provides a linear RI sensitivity over water or waterbased solutions(RI values near 1.33 at optical wavelengths for most biological and many environmental applications),and has temperature-calibration capability.Hence,the said refractometer is a good candidate for sensing in chemical and biological applications.更多还原

【Abstract】 A novel all-fiber temperature-calibrated refractometer based on a compact fiber Bragg grating(FBG) single–multi–single(SMS)structure is proposed and experimentally demonstrated.The sensor head is composed of a FBG combined with a SMS structure,in which the middle multimode fiber(MMF)section is etched by a time-controlled hydrofluoric.The transmission dip of SMS is extremely sensitive to ambient refractive index(RI)variation,whereas the upstream FBG provides the necessary temperature information for RI calibration.All aforementioned functions are performed via a compact FBG-SMS structure not longer than 25 mm.The proposed sensing device provides a linear RI sensitivity over water or waterbased solutions(RI values near 1.33 at optical wavelengths for most biological and many environmental applications),and has temperature-calibration capability.Hence,the said refractometer is a good candidate for sensing in chemical and biological applications.更多还原

【关键词】 optic； calibrated； Bragg； grating； calibration； refractive； cladding； extremely； upstream； interferometer；

【基金】 supported by the National Natural Science Foundation of China(Nos.60727004 and61077060);the National “863” Program of China(Nos.2007AA03Z413 and 2009AA06Z203);the Ministry of Education Project of Science and Technology Innovation(No.Z08119);the Ministry of Science and Technology Project of International Cooperation(No.2008CR1063);the Shaanxi Province Project of Science and Technology Innovation (Nos.2009ZKC01-19 and 2008ZDGC-14);the Guangdong Nature Science Foundation of China(No.S2011010001631);the Fundamental Research Funds for the Central Universities of China(No.11611601)

【文献出处】 Chinese Optics Letters ,中国光学快报(英文版) , 编辑部邮箱 ,2012年03期

【分类号】TN253
【被引频次】17
【下载频次】177

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