Miniature tapered photonic crystal fiber interferometer with enhanced sensitivity by acid microdroplets etching

• DOI: 10.1364/ao.50.004328
• Publication Date: 2011-07-21T13:35:21Z
• Authors: Sun-jie Qiu; Ye Chen; Jun-long Kou; Fei Xu; Yan-qing Lu
• Keywords: Tapering

We fabricate a miniature tapered photonic crystal fiber (PCF) interferometer with enhanced sensitivity by acid microdroplets etching. This method is very simple and cost effective, avoiding elongating the PCF, moving refixing device during etching, measuring. The refractive index sensing properties different PCF diameters are investigated both theoretically experimentally. tapering velocity can be controlled microdroplet size position. greatly increases (five times, 750 nm/RIU) decreases after slightly PCF. keeps low temperature dependence before tapering. More uniformly thinly PCFs realized higher (∼100 times) optimizing etching process.