反射式光纤锥微位移传感器
Optical fiber micro-displacement sensor using a refractive index modulation window assisted reflection fiber taper
基于光纤锥结构，通过飞秒激光在锥区纤芯与包层交界处形成折射率调制区（RIM），从而形成了一反射式准迈克尔逊干涉结构。在此项工作中将此RIM很好的充当了能量耦合窗口的作用，有效提高了纤芯到包层的能量耦合效率。由于包层模对锥区的弯曲非常灵敏，所形成的干涉成功应用于测量光纤锥尖弯曲时产生的微小位移量变化，灵敏度达到4.84dB/μm。同时干涉能量不受温度变化影响，因此传感器能够实现温度和位移的同时测量。
quasi-Michelson interferometer (QMI) is proposed and demonstrated experimentally for micro-displacement measurement. The sensor comprises a taper tip containing a refractive index modification region (RIM) inscribed by a femtosecond laser. An interference spectrum is achieved based on QMI. The sensor is sensitive to fiber bending, making it as a good candidate for micro-displacement measurement. The spectral intensity exhibits a high micro-bending sensitivity 4.84 dB/μm thanks to the sensitivity to bending of recoupled intensity of cladding modes. In contrast, the spectral wavelength is insensitive to bending but linearly responds to temperature. Therefore, the sensor can be as a good potential for bending and temperature measurement simultaneously
乔学光、王若晖、荣强周、邵志华、包维佳
光电子技术
光纤微加工光纤传感器微位移传感器
Micromachiningoptical fiber sensorsmicro-displacement sensors
乔学光,王若晖,荣强周,邵志华,包维佳.反射式光纤锥微位移传感器[EB/OL].(2017-05-04)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201705-308.点此复制
评论