Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, 22453-900 Rio de Janeiro, Brazil.
Sensors (Basel). 2010;10(11):9698-711. doi: 10.3390/s101109698. Epub 2010 Nov 1.
The effect of hydrostatic pressure on the waveguiding properties of high birefringence photonic crystal fibers (HiBi PCF) is evaluated both numerically and experimentally. A fiber design presenting form birefringence induced by two enlarged holes in the innermost ring defining the fiber core is investigated. Numerical results show that modal sensitivity to the applied pressure depends on the diameters of the holes, and can be tailored by independently varying the sizes of the large or small holes. Numerical and experimental results are compared showing excellent agreement. A hydrostatic pressure sensor is proposed and demonstrated using an in-fiber modal interferometer where the two orthogonally polarized modes of a HiBi PCF generate fringes over the optical spectrum of a broad band source. From the analysis of experimental results, it is concluded that, in principle, an operating limit of 92 MPa in pressure could be achieved with 0.0003% of full scale resolution.
我们评估了静水压力对高双折射光子晶体光纤（HiBi PCF）波导性能的影响，分别进行了数值模拟和实验研究。我们研究了一种光纤设计，其通过内圈中两个扩大的孔来产生形式双折射，内圈定义了光纤的芯区。数值结果表明，模式对所施加压力的敏感性取决于孔的直径，可以通过独立改变大孔或小孔的尺寸来进行调整。数值和实验结果进行了比较，吻合得非常好。我们提出并展示了一种基于光纤模式干涉仪的静水压力传感器，其中 HiBi PCF 的两个正交偏振模式在宽带光源的光谱上产生条纹。通过对实验结果的分析，我们得出结论，原则上，在 0.0003%满量程分辨率下，可以实现 92 MPa 的工作压力极限。
