Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Acta Optica Sinica》 2016-04
Add to Favorite Get Latest Update

Spatial Electronic Scanned Low-Coherence Interference Long Distance Optical Fiber Sensing and Demodulation System

Shi Junfeng;Liu Tiegen;Wang Shuang;Jiang Junfeng;Liu Kun;Zou Shengliang;Xiao Mengnan;Institute of Optical Fiber Sensing of Tianjin University, Key Laboratory of Opto-Electronic Information Technology,Ministry of Education, College of Precision Instrument and Optoelectronics Engineering,Tianjin University;  
Spatial electronic scanned low- coherence interference long distance optical fiber sensing and demodulation system is investigated based the superluminescent light emitting diode(SLED). The compact beam path of demodulation interferometry is built by negative lens. The influence of the double SLED light sources power ratio on low-coherence interference fringe is analyzed and the power ratio compensation for transmission loss is discussed. According to the characteristics of double SLED light sources interference fringe, a double-threshold demodulation algorithm is proposed and a pressure demodulation experiment is conducted. Experimental results show that, in the pressure range from 50 k Pa to 180 k Pa, the demodulation precision of 0.24% to 0.40% F.S. is realized,where F.S. is full scale, and that the longest distance can reach 1.76 km. The results are in good agreement with the theoretical analysis.
【Fund】: 国家重大科学仪器设备开发专项(2013YQ030915);; 国家973计划(2010CB327802);; 国家自然科学基金(61227011 61378043 61475114 61505139);; 教育部科学技术研究重大项目(313038);; 天津市自然科学基金(13JCYBJC16200);; 深圳市科技创新委员会基金(JCYJ20120831153904083);; 中国空间技术研究院CAST创新基金;; 新型传感器与智能控制教育部与山西省重点实验室开放课题(201403)
【CateGory Index】: TN253
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved