Journal ArticleDOI
Compact fiber-optic curvature sensor based on super-mode interference in a seven-core fiber.
G. Salceda-Delgado,A. Van Newkirk,Jose Enrique Antonio-Lopez,Alejandro Martinez-Rios,Axel Schülzgen,R. Amezcua Correa +5 more
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TLDR
A compact, low loss, and highly sensitive optical fiber curvature sensor is presented, which allows for using either visibility or spectral shift for sensor interrogation when the device is bent.Abstract:
A compact, low loss, and highly sensitive optical fiber curvature sensor is presented. The device consists of a few-millimeter-long piece of seven-core fiber spliced between two single-mode fibers. When the optical fiber device is kept straight, a pronounced interference pattern appears in the transmission spectrum. However, when the device is bent, a spectral shift of the interference pattern is produced, and the visibility of the interference notches changes. This allows for using either visibility or spectral shift for sensor interrogation. The dynamic range of the device can be tailored through the proper selection of the length of the seven-core fiber. The effects of temperature and refractive index of the external medium on the response of the curvature sensor are also discussed. Linear sensitivity of about 3000 nm/mm−1 for bending was observed experimentally.read more
Citations
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Journal ArticleDOI
High-Sensitivity Bending Sensor Based on Supermode Interference in Coupled Four-Core Sapphire-Derived Fiber
TL;DR: In this article, a Mach-Zehnder interferometer (MZI) sensor based on a four-core sapphire-derived fiber (FSDF) for bending sensing is proposed and demonstrated.
Journal ArticleDOI
Curvature sensor based on fiber ring laser with Sagnac loop
Yang Fan,Wu Yajie,Jia Shi,Ke Yang,Wei Xu,Cuijuan Guo,Hua Bai,Shanshan Zhang,Degang Xu,Weiling Fu,T.G. Liu,Jianquan Yao +11 more
TL;DR: In this paper, a curvature sensor based on fiber ring laser with Sagnac loop is proposed and experimentally demonstrated, which is used to narrow the corresponding 3-dB band-width and enhance the resolution of the sensor.
Journal ArticleDOI
Symmetric supermodes in cyclic multicore fibers
TL;DR: In this article, the authors used abstract symmetries to study a ring of evenly distributed identical cores around a central core and found its normal modes and their effective propagation constants while including the effect of all high-order inter-core couplings.
Journal ArticleDOI
Optimized active multicore fiber bending sensor
Juan A. Vallés,David Benedicto +1 more
TL;DR: In this article, a study of the feasibility of transforming the multicore fiber in a supermode interference based bending sensor into an active stage is presented, by compensating the antisymmetric supermode losses for high curvatures.
Journal ArticleDOI
In-line MZI magnetic sensor based on seven-core fiber and fiber peanut symmetrical structure
TL;DR: In this paper, an in-line optical fiber Mach-Zehnder interferometric (MZI) sensor is proposed and experimentally demonstrated for magnetic field measurement, which is a more compact structure, simple manufacturing process, and high reliability, which would find potential applications in weak magnetic sensing fields.
References
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Journal ArticleDOI
Curvature loss formula for optical fibers
TL;DR: In this article, the curvature loss for optical fibers with constant radius of curvature of their axes is derived by expressing the field outside of the fiber in terms of a superposition of cylindrical outgoing waves.
Journal ArticleDOI
Refractometry based on a photonic crystal fiber interferometer
TL;DR: A simple and compact modal interferometer for applications in refractometry that is highly stable over time, has low temperature sensitivity, and is suitable for measuring indices in the 1.330-1.440 range is reported.
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
Optical bend sensor based on measurement of resonance mode splitting of long-period fiber grating
TL;DR: In this article, an effective method of realizing optical bend sensing based on the measurement of bending-curvature encoded resonance mode splitting of long-period fiber grating was proposed.
Journal ArticleDOI
Multicore fiber sensor for high-temperature applications up to 1000°C
J. Enrique Antonio-Lopez,Zeinab Sanjabi Eznaveh,Patrick LiKamWa,Axel Schülzgen,Rodrigo Amezcua-Correa +4 more
TL;DR: A novel high temperature sensor based on customized multicore fiber (MCF) spliced between two standard single-mode fibers is proposed and experimentally demonstrated, enabling temperature measurements with high sensitivity and accuracy.