物理学报Issue(9)：62-68,7.DOI:10.7498/aps.62.090701
同时测量扭转角度和扭转方向的侧漏光子晶体光纤扭转传感器*
A side-leakage photonic crystal fiber torsion sensor for measuring torsion angle and determining torsion direction simultaneously∗
摘要
Abstract
A highly sensitive torsion sensor, which can measure the torsion angle and determine the torsion direction simultaneously, is pro-posed and experimentally demonstrated by using side-leakage photonic crystal fiber (SLPCF) based Sagnac loop. When the SLPCF is turned in the clockwise direction, the transmission spectra of the torsion sensor shift towards the shorter wavelength side;whereas the transmission spectra of the torsion sensor shift towards the longer wavelength side when the SLPCF is turned in anticlockwise direction. Experimental results demonstrate that the length of the SLPCF inserted into Sagnac loop plays an important role for determining the torsion sensitivity and the torsion angle range. For the SLPCF with shorter length, the torsion sensor has the larger torsion sensitivity, but the torsion angle measuring range would be decreased. The opposite situation takes place for the SLPCF with longer length used in the torsion sensor. When the length of SLPCF is 14.85 cm, the torsion sensitivity of the sensor is up to 0.9354 nm/(◦) and the torsion angle range from–90◦ to+90◦;When we increase the length of SLPCF to 32 cm, the torsion sensitivity of the sensor gets down to 0.2132 nm/(◦), but the torsion angle range can be expanded as from–180◦to+180◦. To eliminate the perturbation of environmental temperature, we adopt a two-dimensional measuring matrix to achieve simultaneous measurements of the torsion angle and tempera-ture. In other words, using two-dimensional measuring matrix can also eliminate the perturbation of the environmental temperature to the measured result of torsion angle.关键词
光纤传感器/侧漏型光子晶体光纤/扭转传感器/Sagnac干涉仪Key words
optical fiber sensor/side-leakage photonic crystal fiber/torsion sensor/Sagnac interferometer引用本文复制引用
娄淑琴,鹿文亮,王鑫..同时测量扭转角度和扭转方向的侧漏光子晶体光纤扭转传感器*[J].物理学报,2013,(9):62-68,7.基金项目
国家自然科学基金(批准号:51176162)、国家重点基础研究发展计划(973计划)(批准号:2009CB219802)、十二五国家科技支撑计划(批准号:2012BAB18B03)和高等学校学科创新引智计划(批准号:B08026)资助的课题.@@@@Project supported by the National Natural Science Foundation of China (Grant No.51176162), the National Basic Research Program of China (Grant No.2009CB219802), the National Key Technology R&D Program of China (Grant No.2012BAB18B03), and the Program of Introducing Talents of Discipline to University (Grant No. B08026) （批准号:51176162）
