光子晶体光纤(PCF)压力传感器可广泛用于各种环境压力监测中。采用全矢量有限元方法对双芯光子晶体光纤的双折射特性进行了分析, 采用二阶微分方程理论模型模拟了光子晶体光纤高压力传感器对外界压力的响应, 并应用这个模型讨论了外界压力作用对敏感元件有效折射率和双折射的影响, 提出了一种高压力光子晶体光纤传感器方案。计算结果表明高压力致双空气孔芯光子晶体光纤的双折射值可达很高, 光子晶体光纤传感器系统更为简洁紧凑。

Photonic crystal fibers (PCF) sensors have broad application in the pressure environmental monitoring.The birefringence of the dual-hole core photonic crystal fibers is analysed by the full-vect finite element methods, the photonic crystal fibers sensors response to pressure is simulated by the second-order differential equation theoretical model and the influence to the effective refractive index and the birefringence of the sensing element are discussed by the model, the high-pressure photonic crystal fibers sensors scheme is presented. Calculation results show that the birefringence of the dual-hole core photonic crystal fibers is very large. The system of the pressure photonic crystal fibers sensors is brevity and compaction.