Multimode-Coreless-Multimode Fiber-Based Sensors: Theoretical and Experimental Study

Fabian, Noe San; Socorro‐Leránoz, Abián B.; Villar, Ignacio Del; Díaz, Silvia; Matı́as, Ignacio R.

doi:10.1109/jlt.2019.2921609

Cited by 25 publications

(12 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sensors based on modal interferometer have been proposed with different structures. There are single-mode fiber (SMF) spliced to no-core fiber (NCF) with coated mirror at the other end [17], SMF-NCF-SMF [18], [19], SMF-dual side-hole fiber-SMF [20], SMF-HCF(hollow core fiber)-SMF [21], [22], SMF-NCF-D-shape fiber-NCF-SMF [23], SMF-MMF(multi-mode fiber)-thinned fiber-SMF [24],SMF-MMF-SMF [25] and MMF-NCF-MMF [26]. Although the sensitivities of the wavelength-modulated sensors are high, the wavelength processing depends on complicated technology or instruments like optical spectrum analyzer (OSA) and their measurement ranges are limited to several centimeters including high cross response to temperature and RI.…”

Section: Introductionmentioning

confidence: 99%

Reflected Light Intensity-Modulated Continuous Liquid Level Sensor Based on Oblique End Face Coupling Optical Fibers

Cheng

Zhao

et al. 2020

IEEE Sensors J.

View full text Add to dashboard Cite

A light intensity-modulated optical fiber sensor for continuous level measurement is proposed and demonstrated. The sensor is constructed by vertically arranging groups of fibers on the oblique surface which reflects all the incident light when the fibers are in the air but a small proportion of light when the fibers are immersed in the liquid. In order to implement easy modulation and detection, the angle of oblique surface is specially designed to get the maximum intensity modulation according to Fresnel reflection. The fiber groups consist of emitting and receiving fibers, which are tightly fixed to make it easy to detect reflected light based on side coupling effect. The calculation model of the oblique structure and the light path simulation by finite element analysis are used to optimize the oblique angle and prove the feasibility of the sensor. Gradient level experiments and stability tests in the laboratory indicate that the sensor has high sensitivity of 0.21mW/cm, superior resolution and good stability.

show abstract

Section: Introductionmentioning

confidence: 99%

Reflected Light Intensity-Modulated Continuous Liquid Level Sensor Based on Oblique End Face Coupling Optical Fibers

Cheng

Zhao

et al. 2020

IEEE Sensors J.

View full text Add to dashboard Cite

show abstract

“…Another well-known liquid-level measurement method, mechanical method, suffers from its shortcomings of big size, low accuracy, and unsafety [3]. To date, there are many efforts devoted to the development of fiber-optic liquid-level sensors owing to their excellent features, such as high sensitivity, small size, immunity to electromagnetic interference, and resistance to harsh environments [4][5][6]. Recently, a number of fiber grating sensing structures, including fiber Bragg gratings (FBGs) [7,8], long period gratings (LPGs) [9,10], and tilted fiber Bragg gratings (TFBGs) [11,12], have been demonstrated for liquid-level measurement.…”

Section: Introductionmentioning

confidence: 99%

All-Fiber Liquid-Level Sensor Based on In-Line MSM Fiber Structure

Sun

Liu

et al. 2020

Photonic Sens

View full text Add to dashboard Cite

We propose and demonstrate an all-fiber liquid-level sensor using an in-line multimode-single-mode-multimode (MSM) fiber structure. A piece of single-mode fiber (SMF) is spliced to two sections of equivalent multimode fiber (MMF) which are used as both mode splitter and mode coupler. The cladding mode will be excited when the light propagates from MMF to SMF, and then it will be combined with fundamental mode to form a Mach-Zehnder interferometer (MZI) when the light propagates from SMF to the other MMF. The liquid level is detected by the selected resonant dips shift of the transmission spectrum. A sensing sensitivity of 264.6 pm/mm is achieved for the proposed sensor with an SMF length of 26mm. Due to its compact structure, easy fabrication, and high sensitivity, the proposed liquid-level sensor is attractive for practical applications in a variety of fields, such as marine detection and chemical processing.

show abstract

“…There have been many advances in the research of MMFs and the sensor based on MMFs [8][9][10][11]. The theory of how the beam propagates in MMFs has also been improved.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Errors Caused by Disturbed Multimode Fibers in the Interferometer with Fiber-Coupled Delivery

Xia

Zhang

Zhu

et al. 2020

Sensors

View full text Add to dashboard Cite

In this paper, the errors of the displacement measurement interferometer with multi-mode fiber-coupled delivery are analyzed when the fibers are disturbed. Simulation results show that the characteristic frequency of the measurement error is consistent with that of disturbance, and the error has higher order frequency components. The experiments are designed for the effect of fringe contrast on the measurement error. The experimental results show that the measurement error is rather sensitive to the interference angle between the measurement arm and the reference arm in the multi-mode fibers, but not to the irradiance ratio of the measurement arm and the reference arm. In an interferometer with multimode fiber, the interference angle between the measurement arm and the reference arm needs to be restricted. This conclusion provides a theoretical basis for designing an interferometer measurement system with interference angle that is adaptive to wider application.

show abstract

Multimode-Coreless-Multimode Fiber-Based Sensors: Theoretical and Experimental Study

Cited by 25 publications

References 24 publications

Reflected Light Intensity-Modulated Continuous Liquid Level Sensor Based on Oblique End Face Coupling Optical Fibers

Reflected Light Intensity-Modulated Continuous Liquid Level Sensor Based on Oblique End Face Coupling Optical Fibers

All-Fiber Liquid-Level Sensor Based on In-Line MSM Fiber Structure

Analysis of the Errors Caused by Disturbed Multimode Fibers in the Interferometer with Fiber-Coupled Delivery

Contact Info

Product

Resources

About