Journal ArticleDOI
Highly sensitive curvature sensor based on single-mode fiber using core-offset splicing
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TLDR
In this article, a highly sensitive curvature sensor based on core offset splicing is proposed and demonstrated, which has a high sensitivity of −22.947nm/m −1 in the range from 0.35312m − 1 to 2.8127m−1.Abstract:
A highly sensitive curvature sensor based on core-offset splicing is proposed and demonstrated. The whole fabrication process is quite simple and the sensor head is cost effective. Measurement results show that it has a high sensitivity of −22.947 nm/m −1 in the range from 0.35312 m −1 to 2.8127 m −1 . Temperature sensitivity of 77.6 pm/°C within the range of 20–80 °C has also been achieved, which implies the possibility for measurement of temperature. High sensitivity and low-cost make it a preferable candidate for small curvature sensing with high resolution in practical applications.read more
Citations
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Journal ArticleDOI
Sensitivity amplification of fiber-optic in-line Mach–Zehnder Interferometer sensors with modified Vernier-effect
TL;DR: A novel sensitivity amplification method for fiber-optic in-line Mach-Zehnder interferometer (MZI) sensors has been proposed and demonstrated and a maximum sensitivity amplification factor of nearly 9 is realized.
Journal ArticleDOI
Review of optical fiber bending/curvature sensor
TL;DR: A review of optical fiber bending sensors is presented in this article, where the authors mainly focus on the measurement methods of the structure bending and the existing problems of the bending measurement methods and the future prospects of different bending sensors.
Journal ArticleDOI
A highly sensitive Mach–Zehnder interferometric refractive index sensor based on core-offset single mode fiber
Yong Zhao,Xuegang Li,Lu Cai +2 more
TL;DR: In this paper, a highly sensitive refractive index (RI) sensor based on all-fiber Mach-Zehnder interferometer (MZI) was simulated and demonstrated by splicing a section of single mode fiber (SMF) between two SMFs with a slight core offset at two splicing joints.
Journal ArticleDOI
A Curvature Sensor Based on Twisted Single-Mode–Multimode–Single-Mode Hybrid Optical Fiber Structure
Ke Tian,Yifan Xin,Wenlei Yang,Tao Geng,Jing Ren,Ya-Xian Fan,Gerald Farrell,Elfed Lewis,Pengfei Wang +8 more
TL;DR: In this paper, an optical fiber curvature sensor based on a twisted multimode fiber sandwiched between two single-mode fibers was proposed and investigated theoretically and experimentally, and the measured transmission spectrum exhibits good agreement with theoretical predictions.
Journal ArticleDOI
All-fiber MZI sensor based on seven-core fiber and fiber ball symmetrical structure
TL;DR: In this article, an all-fiber and compact Mach-Zehnder interferometric (MZI) sensor is proposed and experimentally demonstrated for the measurement of temperature and curvature.
References
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Journal ArticleDOI
High temperature fiber sensor with high sensitivity based on core diameter mismatch
TL;DR: An interference pattern in the transmission spectrum of the proposed device was obtained and the interference pattern was found to shift to the longer wavelength region with respect to temperature variation.
Journal ArticleDOI
All-Fiber Curvature Sensor Based on Multimode Interference
TL;DR: In this paper, a fiber-optic curvature sensor based on the singlemode-multimode-singlemode (SMS) fiber structure is developed, where the dependence of the wavelength shifts and intensity changes of three transmission notches on the applied curvature are different from each other.
Journal ArticleDOI
Single-Mode Fiber Refractive Index Sensor Based on Core-Offset Attenuators
TL;DR: In this paper, a fiber Michelson interferometer refractive index (RI) sensor with a single core-offset attenuator and a layer of ~ 500-nm gold coating was demonstrated.
Journal ArticleDOI
All-fiber Mach-Zehnder curvature sensor based on multimode interference combined with a long-period grating.
Orlando Frazão,Jaime Viegas,Paulo Caldas,Jose Luis Santos,F. M. Araújo,Luís Ferreira,Faramarz Farahi +6 more
TL;DR: A novel Mach-Zehnder interferometer based on a fiber multimode interference structure combined with a long-period fiber grating (LPG) is proposed and demonstrated as a bending sensor.
Journal ArticleDOI
Fiber-optic bending vector sensor based on Mach–Zehnder interferometer exploiting lateral-offset and up-taper
TL;DR: A simple, compact, and highly sensitive optical fiber directional bend sensor is presented that defines a pair of directions along which the bending response of the Mach-Zehnder interferometer transmission spectrum is different and thus could be used for bending vector measurement.