具有低温敏感性的高灵敏度长周期光纤光栅应变传感器。
Highly sensitive long-period fiber-grating strain sensor with low temperature sensitivity.
作者信息
Wang Yi-Ping, Xiao Limin, Wang D N, Jin Wei
机构信息
Department of Electrical Engineering, Hong Kong Polytechnic University, Hong Kong, China.
出版信息
Opt Lett. 2006 Dec 1;31(23):3414-6. doi: 10.1364/ol.31.003414.
A long-period fiber-grating sensor with a high strain sensitivity of -7.6 pm/microepsilon and a low temperature sensitivity of 3.91 pm/ degrees C is fabricated by use of focused CO(2) laser beam to carve periodic grooves on a large- mode-area photonic crystal fiber. Such a strain sensor can effectively reduce the cross-sensitivity between strain and temperature, and the temperature-induced strain error obtained is only 0.5 microepsilon/ degrees C without using temperature compensation.
利用聚焦的二氧化碳激光束在大模场面积光子晶体光纤上刻蚀出周期性凹槽，制作出一种长周期光纤光栅传感器，其具有 -7.6 pm/με 的高应变灵敏度和 3.91 pm/°C 的低温度灵敏度。这种应变传感器可以有效降低应变与温度之间的交叉灵敏度，在不使用温度补偿的情况下，获得的温度诱导应变误差仅为 0.5 με/°C。
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