Single-crystal ruby fiber temperature sensor

• Published in: Sensors and actuators. A. Physical. Vol. 101; no. 1; pp. 24 - 29
• Main Authors: Seat, H.C, Sharp, J.H, Zhang, Z.Y, Grattan, K.T.V.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 30.09.2002; Elsevier Science; Elsevier
• Subjects: Applied geology; Computer Science; Earth Sciences; Engineering Sciences; Environmental Engineering; Environmental Sciences; Exact sciences and technology; Fiber optic; Fiber-optic instruments; General equipment and techniques; Geophysics; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Materials; Mechanics; Micro and nanotechnologies; Microelectronics; Modeling and Simulation; Optical instruments, equipment and techniques; Optics; Photonic; Physics; Ruby; Sciences of the Universe; Sensor; Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing; Temperature; Thermal instruments, apparatus and techniques; Thermometry; Vibrations; Temperature; Fiber optic; Ruby; Sensor; Temperature sensors; Optical fibers; Fluorescence spectrum; Absorption spectroscopy; Monocrystals; Manufacturing processes; Thermometry; Laser heated pedestal growth method; Experimental study
• ISSN: 0924-4247; 1873-3069
• DOI: 10.1016/S0924-4247(02)00190-5

Single-crystal ruby fibers with nominal diameters in the range from 80 to 500 μm and lengths up to 170 mm have been produced using the laser heated miniature pedestal growth technique. These fibers were tested for use as the basis of fiber optic temperature sensors. Characterization of the fiber fluorescence properties and comparison to bulk samples together with their high melting point indicate their potential for fluorescence-based sensing at extremely elevated temperatures. Good geometrical matching with current fiber optic technology and the use of phase-locked detection techniques also allow high resolution measurements to be obtained.