A Novel Micro-Displacement Sensor Based on Double Optical Fiber Probes Made through Photopolymer Materials

In this paper, a novel micro-displacement sensor with double optical fiber probes is proposed and designed, which can realize the highly sensitive sensing of longitudinal or lateral micro-displacements. The optical fiber probes are made through photopolymer formulation, and the effects of reaction time and optical power on the growth length of the probe are illustrated. The relationship between light intensity and longitudinal micro-displacement is a power function in the range of 0–100 μm at room temperature with a correlation coefficient of 98.92%. For lateral micro-displacement, the sensitivity is −2.9697 dBm/μm in the range of 0–6 μm with a linear fit of 99.61%. In addition, the linear correlation coefficient decreases as the initial longitudinal distance increases, and the function of these correlation coefficients is also linear with a linearity of 96.14%. This sensor has a simple manufacturing process, low cost, high sensitivity, and fast response speed. It is suitable for harsh environments such as strong electromagnetic interference and corrosivity, and has a broad application prospect in the field of micro-displacement sensing.

Download Full-text

Collectible optical power of various specially shaped multimode optical fiber probes for contact sensing

Optical Engineering ◽

10.1117/1.2829151 ◽

2008 ◽

Vol 47 (1) ◽

pp. 010502 ◽

Cited By ~ 3

Author(s):

Chao Lu ◽

Claire Gu ◽

Liangcai Cao ◽

Qingsheng He ◽

Guofan Jin

Keyword(s):

Optical Fiber ◽

Optical Power ◽

Multimode Optical Fiber ◽

Optical Fiber Probes ◽

Fiber Probes ◽

Contact Sensing

Download Full-text

Optical Fiber Sensor for Heavy Chemical Detection: An Overview

Journal of Physics Conference Series ◽

10.1088/1742-6596/2075/1/012010 ◽

2021 ◽

Vol 2075 (1) ◽

pp. 012010

Author(s):

Nurul Athirah Mohamad Abdul Ghafar ◽

Arni Munira Markom ◽

Marni Azira Markom ◽

Ahmad Razif Muhammad

Keyword(s):

Optical Fiber ◽

Electromagnetic Interference ◽

Low Cost ◽

Optical Fiber Sensor ◽

High Sensitivity ◽

Electrochemical Analysis ◽

Detection Methods ◽

Fiber Sensor ◽

Sensor Technology ◽

Compact Size

Abstract Heavy metal contaminations such as mercury, lead, arsenic, cadmium, and zinc are becoming more serious and have become a hazard to human health. Due to their non-biodegradable nature, they can easily accumulate in the environment and cause toxicity even at low concentrations. Therefore, detecting the presence of these metal ions requires a highly sensitive sensing method. Traditional detection methods, such as electrochemical analysis, require complicated sample preparation, are costly, and typically require a lengthy measurement period. These days, optical fiber sensors have been acknowledged due to their unique characteristics such as compact size, high sensitivity, low cost, high flexibility, and immunity to electromagnetic interference. An overview of an optical fiber sensor technology for heavy chemical measurement is discussed in this paper. The sensing mechanisms are summarized, as well as the chemical water quality parameters and sensitivities.

Download Full-text

Nano- and Micropatterning on Optical Fibers by Bottom-Up Approach: The Importance of Being Ordered

Applied Sciences ◽

10.3390/app11073254 ◽

2021 ◽

Vol 11 (7) ◽

pp. 3254

Author(s):

Marco Pisco ◽

Francesco Galeotti

Keyword(s):

Optical Fiber ◽

Optical Fibers ◽

Self Assembly ◽

Ordered Structures ◽

Bottom Up ◽

Photonic Structures ◽

Fiber Technology ◽

Optical Fiber Probes ◽

Fiber Probes ◽

Self Assembled

The realization of advanced optical fiber probes demands the integration of materials and structures on optical fibers with micro- and nanoscale definition. Although researchers often choose complex nanofabrication tools to implement their designs, the migration from proof-of-principle devices to mass production lab-on-fiber devices requires the development of sustainable and reliable technology for cost-effective production. To make it possible, continuous efforts are devoted to applying bottom-up nanofabrication based on self-assembly to decorate the optical fiber with highly ordered photonic structures. The main challenges still pertain to “order” attainment and the limited number of implementable geometries. In this review, we try to shed light on the importance of self-assembled ordered patterns for lab-on-fiber technology. After a brief presentation of the light manipulation possibilities concerned with ordered structures, and of the new prospects offered by aperiodically ordered structures, we briefly recall how the bottom-up approach can be applied to create ordered patterns on the optical fiber. Then, we present un-attempted methodologies, which can enlarge the set of achievable structures, and can potentially improve the yielding rate in finely ordered self-assembled optical fiber probes by eliminating undesired defects and increasing the order by post-processing treatments. Finally, we discuss the available tools to quantify the degree of order in the obtained photonic structures, by suggesting the use of key performance figures of merit in order to systematically evaluate to what extent the pattern is really “ordered”. We hope such a collection of articles and discussion herein could inspire new directions and hint at best practices to fully exploit the benefits inherent to self-organization phenomena leading to ordered systems.

Download Full-text