期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 30, 期 10, 页码 915-918出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2018.2825296
关键词
Optical fiber sensors; microsensors; interferometers
Based on a novel modulated arc-discharge technique, a single step process for taper-functionalized optical microfiber in-line Mach-Zehnder interferometers (MZIs) fabrication is presented. By this process, microfiber and its added down-tapers are fabricated exploiting an amplitude modulated arc-discharge heating in one-step. In this letter, included shorttime arc OFF switches during an arc-assisted microfiber fabrication process result in the formation of miniature down-tapers along the microfiber being pulled. The arrangement and time duration of these arc OFF pulses determine the functionality of the resultant microfiber structure. The first single step taper-functionalized microfiber in-line MZI exhibits an extremely high interference dip (similar to 29 dB) with low full width at half maximum (similar to 5 nm) and high external refractive index (RI) sensitivity of 1840 nm per RI unit around 1.368.
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