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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Proceedings ArticleDOI
Supermode Bragg Grating Inscribed in a Strongly Coupled Seven-Core Fiber for Multi-Parameter Sensing Applications
TL;DR: In this article , a supermode Bragg grating inscribed in a strongly coupled seven-core fiber for multi-parameter sensing is proposed and demonstrated, and the responses of the device to temperature and strain are experimentally characterized, respectively.
Proceedings ArticleDOI
A few mode fiber curvature sensor based on two spherical-shape structures modal interferometer
Xinghu Fu,Siwen Wang,Shun-yang Zhang,Qin Liu,Qifeng Li,Haiyang Xie,Guangwei Fu,Weihong Bi,Yanjun Li +8 more
TL;DR: In this article, a curvature sensor based on Few Mode Fiber (FMF) is proposed, where a length of FMF is spliced with waist enlarge between two Single mode Fibers (SMFs) to form two spherical shape structure.
Patent
Methods of and systems for processing using adjustable beam characteristics
TL;DR: In this article, a method of processing by controlling one or more beam characteristics of an optical beam may include: launching the optical beam into a first length of fiber having a first refractive index profile (RIP), coupling the optical beacons from the first length-of-fiber into a second-length-offiber having a second RIP, and confining the modified one-or-more beam characteristics within the one- or more confinement regions.
Journal ArticleDOI
Optical fiber curvature sensor based on polydimethylsiloxane encapsulated Mach–Zehnder interferometer
TL;DR: In this article, an all-optical fiber curvature sensor is proposed, which is composed of a polydimethylsiloxane elastic material encapsulated all-Optical fiber Mach-Zehnder interferometer, and its bending characteristics are demonstrated.
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.