基于游标效应的双MZI温度传感理论研究
|
摘要
光纤传感器的灵敏度是一个重要指标。设计了一种基于游标效应的双马赫-曾德尔干涉仪(MZI)温度传感器,该传感器由两个臂长差相差不大的MZI级联构成。从理论上详细研究了利用游标效应提高传感器灵敏度的方法。模拟结果表明:传感器加热区越长,灵敏度越高;当传感干涉仪臂长差小于参考干涉仪臂长差时,包络曲线波峰将随着温度升高向短波方向移动,反之,向长波方向移动;游标效应可大幅提升传感器的灵敏度,当臂长差差值在0.01mm时,灵敏度可提高100余倍。
Sensitivity is an important parameter of optical fiber sensor, this paper designs a double Mach-Zehnder interferometer(MZI) temperature sensor based on vernier effect, the sensor consists of two cascaded MZI with similar arm difference. It studies the method of using vernier effect to improve sensor sensitivity in detail. Theoretical simulative results show when the heating area becomes longer, the sensitivity of the sensor will get more improvement. Besides, when the arm difference of sensor interferometer is shorter than the arm difference of another interferometer, the envelope curve will move in the direction of short wavelength, otherwise, move in the direction of long wavelength. The vernier effect can greatly enhance the sensitivity of the sensor, when the length difference between the arms is 0.01 mm, the sensitivity can be increased by 100 times.
Sensitivity is an important parameter of optical fiber sensor, this paper designs a double Mach-Zehnder interferometer(MZI) temperature sensor based on vernier effect, the sensor consists of two cascaded MZI with similar arm difference. It studies the method of using vernier effect to improve sensor sensitivity in detail. Theoretical simulative results show when the heating area becomes longer, the sensitivity of the sensor will get more improvement. Besides, when the arm difference of sensor interferometer is shorter than the arm difference of another interferometer, the envelope curve will move in the direction of short wavelength, otherwise, move in the direction of long wavelength. The vernier effect can greatly enhance the sensitivity of the sensor, when the length difference between the arms is 0.01 mm, the sensitivity can be increased by 100 times.
引文
[1]莫徽忠.基于MZI的多用途全光纤传感器设计[J].光通信技术,2014,38(9):25-27.
[2]兆雪,邵敏,乔学光,等.光纤锥在线型马赫-曾德干涉仪的折射率传感特性[J].光子学报,2016,45(2):88-92.
[3]张珊珊.新型光纤M-Z干涉传感结构及特性研究[D].天津:南开大学,2014.
[4]DAOXIN DAI.Highly sensitive digital optical sensor based on cascaded high-Q ring-resonators[J].Optics Express,2009,17(26):23817-23822.
[5]JIN L,LI M,HE J J.Highly-sensitive silicon-on-insulator sensor based on two cascaded micro-ring resonators with vernier effect[J].Optics Communications,2011,284(1):156-159.
[6]ZHANG Peng,TANG Ming,GAO Feng.Cascaded fiber-optic FabryPerot interferometers with Vernier effect for highly sensitive measurement of axial strain and magnetic field[J].Optics Express,2014,22(16):19581-19588.
[7]SHAO L Y,LUO Y,ZHANG Z,et al.Sensitivity-enhanced temperature sensor with cascaded fiber optic Sagnac interferometers based on Vernier-effect[J].Optics Communications,2015(336):73-76.
[8]PENG Wei,ZHANG Xinpu,LIU Yun.Temperature characteristics of a core-mode interferometer based on a dual-core photonic crystal fiber[J].Applied Physics B,2014,116(1):21-26.
[2]兆雪,邵敏,乔学光,等.光纤锥在线型马赫-曾德干涉仪的折射率传感特性[J].光子学报,2016,45(2):88-92.
[3]张珊珊.新型光纤M-Z干涉传感结构及特性研究[D].天津:南开大学,2014.
[4]DAOXIN DAI.Highly sensitive digital optical sensor based on cascaded high-Q ring-resonators[J].Optics Express,2009,17(26):23817-23822.
[5]JIN L,LI M,HE J J.Highly-sensitive silicon-on-insulator sensor based on two cascaded micro-ring resonators with vernier effect[J].Optics Communications,2011,284(1):156-159.
[6]ZHANG Peng,TANG Ming,GAO Feng.Cascaded fiber-optic FabryPerot interferometers with Vernier effect for highly sensitive measurement of axial strain and magnetic field[J].Optics Express,2014,22(16):19581-19588.
[7]SHAO L Y,LUO Y,ZHANG Z,et al.Sensitivity-enhanced temperature sensor with cascaded fiber optic Sagnac interferometers based on Vernier-effect[J].Optics Communications,2015(336):73-76.
[8]PENG Wei,ZHANG Xinpu,LIU Yun.Temperature characteristics of a core-mode interferometer based on a dual-core photonic crystal fiber[J].Applied Physics B,2014,116(1):21-26.