In-fiber liquid-level probe based on Michelson interferometer via dual-mode elliptical multilayer-core fiber. Issue 13 (19th July 2016)

• Record Type: Journal Article
• Authors: Liang, Xiao; Ren, Guobin; Li, Yang; Liu, Zhibo; Wei, Huai; Jian, Shuisheng
• Is Part Of: Journal of modern optics. Volume 63:Issue 13(2016)
• Page Start: 1254
• Page End: 1259
• Publication Date: 2016-07-19
• Subjects: Liquid-level probe -- elliptical multilayer-core fiber -- dual-mode fiber -- Michelson interferometer -- sensor; Optics -- Periodicals; 535
• DOI: 10.1080/09500340.2015.1137367
• Languages: English
• ISSNs: 0950-0340

Abstract

Abstract: An in-fiber liquid-level probe fabricated from homemade dual-mode elliptical multilayer-core fiber (EMCF) was proposed and experimentally demonstrated. The proposed sensor simply consists of a segment of the EMCF with one end coated with silver film, and a Michelson interferometer is roughly established when light from single-mode fiber incident from the other end. The detected interference patterns, rather clean due to the few-mode property, shift as the liquid level due to strong interaction between high-order modes and measurands through evanescent waves. Both the propagation characteristics and operation principle of such a sensor were demonstrated in detail, and sensitivities of 33.48, 43.35, and 48.93 pm/mm corresponding to liquid indices of 1.333, 1.353, and 1.373 were successfully achieved with a 50-mm EMCF probe, respectively. Moreover, the proposed sensor had the potential to discriminate measurand index after proper calibration.