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
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Journal ArticleDOI
Post chemical etching of tapered seven-core fiber sensor for enhanced figure of merit.
Zhen Tian,Yicun Yao,Jinhui Yuan,Liqiang Zhang,Nan-Kuang Chen,Yanqing Zhang,Minghong Wang,Qiang Wu +7 more
TL;DR: In this paper , a post chemical etching process to a tapered seven-core fiber (TSCF) is proposed and experimentally demonstrated to effectively adjust the mode profiles of high-order supermodes, aimed to improve the figure of merit (FOM).
Journal ArticleDOI
A Highly Sensitive Curvature Sensor Based on Omega-Shaped Long-Period Fiber Grating
TL;DR: In this paper , a compact omega-shaped long-period fiber grating (OS-LPFG) was proposed for vector bending measurement, which is fabricated by periodically splicing singlemode fiber (SMF) and multimode fiber (MMF) into omega shape to get the purpose of sensitivity enhancement.
Sensor de temperatura de fibra optica basado en interferometros intermodales recubiertos con metales
TL;DR: In this article, a sensor de temperatura basado en un interferometro intermodal tipo Mach-Zehnder (MZI, Mach Zehnder interferometer), recubierto con una capa delgada de aluminio is presentado.
Proceedings ArticleDOI
Simulation of an In-Line Optofluidic Refractive Index Sensor Based on a Seven-Liquid-Core Teflon-Cladding Fiber
TL;DR: In this article , a modal interferometer based on a section of liquid-filled seven-hole Teflon-cladding fiber sandwiched by two standard single mode fibers (SMFs) was proposed and theoretically demonstrated.
Journal ArticleDOI
强耦合七芯光纤超模式布拉格光栅及其温度和应变响应特性研究
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.