A Hybrid Mach-Zehnder Interferometer for Refractive Index and Temperature Measurement

作者：Ni, Xiaoqi^*; Wang, Ming; Guo, Dongmei; Hao, Hui; Zhu, Jiali

来源：IEEE Photonics Technology Letters, 2016, 28(17): 1850-1853.

DOI：10.1109/LPT.2016.2558209

• Mach-Zehnder interferometer
• reflective index
• temperature
• micro cavity
• PCF

We fabricate and experimentally demonstrate a hybrid structured in-line Mach-Zehnder interferometer (MZI) for simultaneous measurement of refractive index (RI) and temperature. The MZI is composed of an embedded slender air cavity in a micro fiber cascaded to a piece of photonic crystal fiber (PCF). The interferometer is fabricated by fusion splicing and fused tapering. The interference spectra based on the air cavity and the PCF can be extracted through low-pass and bandpass filters, respectively. RI and temperature are interrogated through a coefficient matrix simultaneously by tracing two-dip wavelength shifts of the interference spectra. Novel structure, easy fabrication, simple system, and simultaneous measurement make it appropriate for dual-parameter sensing application.

• 出版日期2016-9-1
• 单位南京师范大学