Journal ArticleDOI
Characteristics of potential fibre Bragg grating sensor-based devices at elevated temperatures
Suchandan Pal,Jharna Mandal,Tong Sun,Kenneth T. V. Grattan,Michael Fokine,Fedrik Carlsson,Pierre Yves Fonjallaz,Scott A Wade,Stephen F Collins +8 more
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TLDR
Fibre Bragg gratings (FBGs) of type I and IIA were fabricated in Ge-doped and B-Ge co-dope fibres using a 248 nm excimer laser and their performance characteristics were tested and compared with those of a chemical composition grating (CCG), written in a fluorine-germanium doped fibre, over a wide range of temperatures as mentioned in this paper.Abstract:
Fibre Bragg gratings (FBGs) of type I and IIA were fabricated in Ge-doped and B–Ge co-doped fibres using a 248 nm excimer laser and their performance characteristics were tested and compared with those of a chemical composition grating (CCG), written in a fluorine–germanium doped fibre, over a wide range of temperatures. Long-term testing (more than 600 h) involving a series of step-wise incremental temperature changes shows for the first time the potential of FBGs for high temperature measurement applications (up to and beyond 1100 °C), this depending on the type of FBG involved and the material and composition of the substrate fibre (the CCG was observed to be the most durable at very high temperatures). These gratings are likely to be useful for the simultaneous measurement of strain and temperature over these higher temperature ranges.read more
Citations
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Proceedings ArticleDOI
Force Sensing Robot Fingers using Embedded Fiber Bragg Grating Sensors and Shape Deposition Manufacturing
TL;DR: An exoskeletal force sensing robot finger was developed by embedding fiber Bragg grating sensors into a polymer-based structure to allow the manipulator to sense and measure both contact forces and grasping forces.
Journal ArticleDOI
Exoskeletal Force-Sensing End-Effectors With Embedded Optical Fiber-Bragg-Grating Sensors
TL;DR: A fabrication process that allows for hollow multimaterial structures with embedded fibers to be created and the results of experiments to characterize the sensors and controlling contact forces in a system involving an industrial robot and a two-fingered dexterous hand are presented.
Journal ArticleDOI
High-temperature sensing using surface relief fiber Bragg gratings
Tyson L. Lowder,Kevin H. Smith,Benjamin L. Ipson,Aaron R. Hawkins,Richard H. Selfridge,Stephen M. Schultz +5 more
TL;DR: In this article, the flat side of a D-shaped optical fiber is used as a platform to etch the grating into the surface of the fiber, which is not erased at high temperatures as are standard FBGs.
Journal ArticleDOI
In-Fiber Fabry–Perot Cavity Sensor for High-Temperature Applications
Jinesh Mathew,Oliver Schneller,Dimitrios Polyzos,Dirk Havermann,Richard Carter,William N. MacPherson,Duncan Paul Hand,Robert R. J. Maier +7 more
TL;DR: In this article, a fiber optic temperature sensor based upon a micro Fabry-Perot (F-P) cavity is presented, where the F-P cavity is formed between a reflective in-fiber metallic splice and the airfiber boundary at the end of the sensor.
Journal ArticleDOI
Bragg grating-based fiber-optic laser probe for temperature sensing
TL;DR: In this paper, a novel Bragg grating-based fiber-optic laser probe for temperature sensing using erbium-doped fiber as the active gain medium is reported.
References
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Journal ArticleDOI
Fiber Bragg Gratings: Fundamentals and Applications in Telecommunications and Sensing
TL;DR: The Fibre Bragg grating sensors in optical fibres have been shown to be sensitive to photosensitivity in optical fiber properties as mentioned in this paper, and they have been applied in communications applications.
Book
Fiber Bragg gratings : fundamentals and applications in telecommunications and sensing
Andreas Othonos,Kyriacos Kalli +1 more
Journal ArticleDOI
Thermal decay of fiber Bragg gratings written in boron and germanium codoped silica fiber
TL;DR: In this paper, the thermal decay of fiber bragg gratings with and without hydrogen loading was examined over a period in excess of 5000 h and it was shown that the non-hydrogen loaded gratings do not obey the power law model.
Journal ArticleDOI
Formation of thermally stable chemical composition gratings in optical fibers
TL;DR: In this article, a discussion of possible chemical pathways in the formation of thermally stable chemical composition gratings in optical fibers is presented, which are formed through high-temperature treatment of UV-exposed hydrogen-loaded fibers.
Journal ArticleDOI
Thermal stability of chemical composition gratings in fluorine-germanium-doped silica fibers.
TL;DR: Experimental results indicate that the presence of phosphorous significantly increases the decay rate of chemical composition gratings and diffusion coefficients derived here from experiments and models indicate that fluorine diffusion is the main mechanism of grating decay.
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