High Sensitivity Fiber-optic Liquid Level Sensor Using Biconical Tapered Fibers

Abstract

A liquid level sensor is presented using a biconical tapered standard single-mode fiber, being its main characteristic an outstanding sensitivity for a low cost transducer. Temperature compensation is enabled with the same interrogation equipment.

Spatial-frequency multiplexing of high-sensitivity liquid level sensors based on multimode interference micro-fibers

“…In this paper, we present the spatial frequency multiplexing of a system of highly sensitive tapered micro-fibers for different liquid level measurements. Preliminary results were published in OFS 26 [27]. The theoretical design process and simulation calculations are in good agreement with the obtained experimental results, and are also shown in this work.…”

Enhanced Optical Fiber Lasers and Optical Fiber Sensors Assisted by Micro-drilled Optical Fibers

“…Secondly, two different micro-drilled tapered optical fibers (MDTF) were developed. The fabrication of the tapered fibers was carried out by means of a Taper Manufacturing Station TMS-01-0400 (3SAE) (NorthLab Photonics, Sweden), which allows manufacturing tapered fibers with arbitrary shapes, low losses, and excellent repeatability, as has been previously reported [11]. The transitions between the original optical fiber and the uniform waist of the taper have a length of about 5 mm each for a total taper length of about 30 mm as can be seen in Figure 2.…”