用于液压传感的双芯光子晶体光纤

采用全矢量有限元方法进行光纤设计优化,得到横截面上失去两层空气洞的双芯光子晶体光纤,可用于液压传感.优化的双芯光子晶体光纤的模场半径和数值孔径与单模光纤基本一致,在优化的双芯光子晶体光纤和单模光纤之间有一个相对较低的熔接损耗.计算结果表明由模场半径和数值孔径导致的不匹配造成的总共损耗可低至0.026 dB,低于传统光子晶体光纤和单模光纤0.1 dB的直接熔接损耗.对基于20 cm双芯光子晶体光纤的液压传感器的性能进行研究,结果表明在0～500 MPa量程内的灵敏度为-1.6 pm/MPa.

Dual-core Photonic Crystal Fiber for Hydrostatic Pressure Sensing

By a full-vector finite-element method,the dual-core photonic crystal fiber for hydrostatic pressure sensing with two layers of air holes in the cross-section missed was designed and optimized,The mode field radius and numerical aperture of the optimized dual-core photonic crystal fiber are almost the same as that of the single mode fiber,which contributes to a relatively low splicing loss between the optimized dual-core photonic crystal fiber and the single mode fiber.The calculations results show that the total loss induced by the similar mode field radius and numerical aperture is as low as about 0.026 dB,less than that between the traditional photonic crystal fiber and single mode fiber of 0.1 dB.The performance of the hydrostatic pressure sensor based on the optimized dual-core photonic crystal fiber with a length of 20 cm was studied,and the results show the sensitivity is about-1.6 pm/MPa in the range from 0 to 500 MPa.