基于微纳光纤的长周期光栅及温度传感系统的设计与制备

发布时间：2018-03-29 10:42

  本文选题：长周期光栅(LPG)　切入点：温度传感　出处：《光电子·激光》2017年04期

【摘要】：为了获得高精度的温度传感系统,提出并验证了一种基于长周期光栅(LPG)温度传感系统。首先利用普通单模光纤(MSF)拉制了微纳光纤,拉制的微纳光纤直径约为6.2μm;其次,利用CO2脉冲激光器在拉制的微纳光纤上制作了微纳LPG,光栅的周期为100μm;利用获得的微纳LPG结合马赫-曾德干涉仪(MZI)设计了温度传感系统,在系统中利用声光调制器(AOM)作为移频调制器,获得了200 MHz的微波信号,且随LPG测量温度的增加,微波信号的相对强度逐渐增加,其斜率约为0.46(a.u)/℃。在30min的时间间隔内,测量了信号强度的稳定性,强度变化约为0.5dB,表明系统展现了较高的稳定性。
[Abstract]:In order to obtain a high precision temperature sensing system, a temperature sensing system based on LPG-based long period grating is proposed and validated. Firstly, a micro and nano fiber is fabricated by using ordinary single mode fiber MSF.The diameter of the drawn micro / nano fiber is about 6.2 渭 m. The CO2 pulse laser is used to fabricate the micronano LPGs on the pulled micro-nano fiber, the grating period is 100 渭 m, and the temperature sensing system is designed by using the obtained micro-nano LPG and Mach Zende interferometer. In the system, the acoustooptic modulator (AOM) is used as the frequency shift modulator to obtain the microwave signal of 200 MHz. With the increase of LPG temperature, the relative strength of the microwave signal increases gradually, and its slope is about 0.46(a.u)/ 鈩，

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