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
Dual-Point Refractive Index Measurements Using Coupled Seven-Core Fibers
Natanael Cuando-Espitia,Miguel A. Fuentes-Fuentes,Daniel A. May-Arrioja,Ivan Hernandez-Romano,Rodolfo Martinez-Manuel,Miguel Torres-Cisneros +5 more
TL;DR: In this article, the authors proposed an experimental setup to measure the refractive index (RI) of two independent liquid samples by analyzing a single optical signal, where they spliced a section of a seven-core fiber (SCF) into each arm of a 1 × 2 fiber coupler and spliced additional single mode fiber (SMF) to use as fiber probe tips.
Journal ArticleDOI
Simultaneous Measurement of Curvature and Temperature Based on Asymmetrical FPI
TL;DR: In this article, an asymmetrical Fabry-Perot interferometric (AFPI) fiber sensor is proposed for simultaneous measurement of the curvature and temperature, which is comprised of a low reflective fiber Bragg grating with narrow bandwidth and a no-core fiber with broadband Fresnel reflection.
Journal ArticleDOI
Highly sensitive optical fiber curvature sensor based on a seven-core fiber with a twisted structure.
Weijuan Chen,Zhihao Chen,Yishen Qiu,Lingxin Kong,Hanqing Lin,Chuanzheng Jia,Huibin Chen,Hui Li +7 more
TL;DR: A highly sensitive Mach-Zehnder interferometer based on a twisted structure in seven-core fiber (SCF) for curvature measurement is investigated both theoretically and experimentally, indicating that this highly sensitive all-fiber sensor offers great potential for realization of curvatures measurement in the field of structural health monitoring.
Journal ArticleDOI
High fringe visibility Mach-Zehnder interferometric sensor based on a Four-Core fiber
TL;DR: In this article, an in-line optical fiber Mach-Zehnder interferometer (MZI) sensor with high fringe visibility is reported, formed by splicing a short section of four-core fiber (FCF) between two coup...
Journal ArticleDOI
3D Shape Sensing With FBG-Based Patch: From the Idea to the Device
TL;DR: In this paper , the advantages of 3D printing technology are combined with fiber Bragg grating (FBG) sensors to implement an innovative 3D shape sensor embedded in a 3D printed patch.
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.