Journal ArticleDOI
In-fiber Bragg-grating temperature sensor system for medical applications
TLDR
A quasidistributed in-fiber Bragg grating (FBG) temperature sensor system has been developed for temperature proving in vivo in the human body for medical applications, e.g., hyperthermia treatment as mentioned in this paper.Abstract:
A novel quasidistributed in-fiber Bragg grating (FBG) temperature sensor system has been developed for temperature proving in vivo in the human body for medical applications, e.g., hyperthermia treatment. This paper provides the operating principle of FBG temperature sensors and then the design of the sensor head. High-resolution detection of the wavelength-shifts induced by temperature changes are achieved using drift-compensated interferometric detection while the return signals from the FBG sensor array are demultiplexed with a simple monochromator which offers crosstalk-free wavelength-division-multiplexing (WDM). A "strain-free" probe is designed by enclosing the FBG sensor array in a protection sleeve. A four FBG sensor system is demonstrated and the experimental results are in good agreement with those obtained by traditional electrical thermocouple sensors. A resolution of 0.1/spl deg/C and an accuracy of /spl plusmn/0.2/spl deg/C over a temperature range of 30-60/spl deg/C have been achieved, which meet established medical requirements.read more
Citations
More filters
Journal ArticleDOI
Quantum metrology
TL;DR: It is proved that the typical quantum precision enhancement is of the order of the square root of the number of times the system is sampled, and it is pointed out the different strategies that permit one to attain this bound.
Journal ArticleDOI
In-fibre Bragg grating sensors
TL;DR: In-fibre Bragg grating (FBG) sensors are one of the most exciting developments in the field of optical fiber sensors in recent years as discussed by the authors, and significant progress has been made in applications to strain and temperature measurements.
Journal ArticleDOI
Highly sensitive fiber Bragg grating refractive index sensors
TL;DR: In this paper, the authors combine fiber Bragg grating (FBG) technology with a wet chemical etch-erosion procedure and demonstrate two types of refractive index sensors using singlemode optical fibers.
Journal ArticleDOI
Recent progress in applications of in-fibre Bragg grating sensors
TL;DR: In-fibre Bragg grating (FBG) sensor technology has become one of the most rapidly progressing sensing topics of this decade in the field of optical fiber sensors as mentioned in this paper.
Journal ArticleDOI
Distributed fiber-optic temperature sensing for hydrologic systems
John S. Selker,John S. Selker,Luc Thévenaz,Hendrik Huwald,Alfred Mallet,Wim Luxemburg,Nick van de Giesen,Martin Stejskal,Josef Zeman,Martijn Westhoff,Marc B. Parlange +10 more
TL;DR: In this article, the authors discuss the spectrum of fiber-optic tools that may be employed to make these measurements, illuminating the potential and limitations of these methods in hydrologic science.
References
More filters
Journal ArticleDOI
Multiplexed fiber Bragg grating strain-sensor system with a fiber Fabry–Perot wavelength filter
TL;DR: The use of a fiber Fabry–Perot filter for detecting the wavelength shift of a Fiber Bragg grating sensor or network of sensor elements along a common fiber path is described.
Proceedings ArticleDOI
Fiber Optic Bragg Grating Sensors
TL;DR: In this paper, the authors describe a new method to generate Bragg grating filters in germania-doped communication fibers and discuss their applications as sensors, which are formed by exposing a short section of the core, through the side of the fiber, to an interference pattern of intersecting coherent beams of UV light.
BookDOI
Optical fiber sensors
TL;DR: Optical Fiber-Chemical Sensing using Direct Spectroscopy Chemical Sensing Using Indicator Dyes Dynamic Light Scattering Applied and Its Application in Concentrated Suspensions In Vivo Medical Sensors Fiber-Optic Gyros Fiber Optic Sensors for Condition Monitoring and Engineering Diagnostics Sensors in Industrial Systems Distributed Sensors as discussed by the authors.
Journal ArticleDOI
Recent progress in fibre optic low-coherence interferometry
Yun-Jiang Rao,David A. Jackson +1 more
TL;DR: A review of recent progress in signal processing, sensor developments and multiplexing techniques for fiber optic low-coherence interferometry is presented, with an emphasis on the new developments in this field which have the potential to be exploited for practical applications as mentioned in this paper.