Jha Rajan, Villatoro Joel, Badenes Gonçal, Pruneri Valerio
ICFO-Institut de Ciències Fotòniques, Mediterranean Technology Park, Castelldefels (Barcelona), Spain.
Opt Lett. 2009 Mar 1;34(5):617-9. doi: 10.1364/ol.34.000617.
We report a simple and compact modal interferometer for applications in refractometry. The device consists of a stub of large-mode-area photonic crystal fiber (PCF) spliced between standard single-mode fibers. In the splice regions the voids of the PCF are fully collapsed, thus allowing the coupling and recombination of PCF core and cladding modes. The device is highly stable over time, has low temperature sensitivity, and is suitable for measuring indices in the 1.330-1.440 range. The measure of the refractive index is carried out by monitoring the shift of the interference pattern.
我们报道了一种用于折射测量的简单紧凑的模态干涉仪。该装置由一段大模场面积光子晶体光纤（PCF）短截线拼接在标准单模光纤之间组成。在拼接区域，PCF的空隙完全塌陷，从而允许PCF芯模和包层模的耦合与复合。该装置随时间高度稳定，具有低温度敏感性，适用于测量1.330 - 1.440范围内的折射率。通过监测干涉图样的偏移来进行折射率的测量。
