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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休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 fiber (PCF) pressure sensors can be widely used in a variety of environmental pressure monitoring. The birefringence of the double-core photonic crystal fiber is analyzed by the full-vector finite element method. The second-order differential equation theory model is used to simulate the response of the photonic crystal fiber high pressure sensor to the external pressure. The model is used to discuss the external pressure Effect on the effective refractive index and birefringence of the sensing element, a high-pressure photonic crystal fiber sensor scheme is proposed. The calculated results show that the birefringence of high pressure induced double air-core photonic crystal fiber can be very high, and the photonic crystal fiber sensor system is more compact and compact.