Nanostrain Measurement Using Chirped Bragg Grating Fabry-Perot Interferometer  

作　　者：Ricardo M. SILVA Marta S. FERREIRA Jose L. SANTOS Orlando FRAZAO 

机构地区：[1]INESC Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal and Faculty of Sciences of University of Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal

出　　处：《Photonic Sensors》2012年第1期77-80,共4页光子传感器（英文版）

摘　　要：A simple nanostrain direct current （DC） measurement system based on a chirped Bragg grating Fabry-Perot （FP） structure is presented. The FP cavity, formed between the chirped fiber Bragg grating （CFBG） and the fiber end face, presents an aperiodic behavior due to the CFBG. A laser located in the fringe pattern slope is used to interrogate the sensing head. The optical power parameter is analyzed when strain is applied, for long and short period fringe pattern wavelengths, and sensitivities of-2.87 μW/με and-5.48μW/με are respectively obtained. This configuration presents a resolution of 70 ε.

关 键 词：Optical fiber sensor Fabry-Perot interferometer chirped fiber Bragg grating 

分 类 号：TN241[电子电信—物理电子学] TB9[一般工业技术—计量学]