An in-line Mach-Zehnder interferometer with the temperature compensation based on the photonic crystal fiber
首发时间:2014-03-11
Abstract:An in-line photonic crystal fiber based Mach-Zehnder interferometer (PCF-MZI) with the temperature compensation has been proposed and experimentally demonstrated. The in-line fiber-optic PCF-MZI is fabricated by splicing a section of the photonic crystal fiber between two single mode fibers. The wavelength peak in the transmission spectrum of the interferometer, which is induced by the temperature and strain, shifts to opposite directions respectively. Therefore, the in-fiber PCF-MZI is bonded to a packaging material with a proper coefficient of thermal expansion and the temperature compensation of the in-fiber PCF-MZI can be realized by using the strain which is induced by the thermal expansion of the packaging material. Experimental results show that the proposed PCF-MZI-based device possess the temperature insensitive feature, and a temperature stability of 1.0 pm/ C has been experimentally demonstrated with the packaging material of ceramic. The proposed temperature compensation method is simple, passive, cost effective, and easy to implement.
keywords: physical electronics fiber optic sensor Mach-Zehnder interferometer temperature compensation photonic crystal fiber
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温度补偿的基于光子晶体光纤在线Mach-Zehnder干涉仪
摘要:我们提出了一种温度补偿的基于光子晶体光纤在线Mach-Zehnder干涉仪。该在线Mach-Zehnder干涉仪由一段熔接在两段单模光纤之间的光子晶体光纤构成。在干涉仪的传输光谱中,由温度和应变引起的峰值波长分别向不同的方向移动。因此我们可以将基于光子晶体光纤的Mach-Zehnder干涉仪粘在一种适当热膨胀系数的封装材料上,利用封装材料热膨胀产生的应变来实现温度补偿。实验结果显示,这种提出的基于光子晶体光纤的Mach-Zehnder干涉仪的器件具有温度不敏感的特性。当封装材料为陶瓷时,其温度稳定性为1.0pm/摄氏度。这种温度补偿的方法结构简单,成本低,易于操作。
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