scholarly journals Rare Earth Doped Silica Optical Fibre Sensors for Dosimetry in Medical and Technical Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
N. Chiodini ◽  
A. Vedda ◽  
I. Veronese
Keyword(s):  
Radiation Therapy ◽  
Rare Earth ◽  
Optical Fibre ◽  
Rare Earths ◽  
High Energy ◽  
Silica Matrix ◽  
Optical Fibres ◽  
General Description ◽  
Optical Fibre Sensors ◽  
Rare Earth Doped

Radioluminescence optical fibre sensors are gaining importance since these devices are promising in several applications like high energy physics, particle tracking, real-time monitoring of radiation beams, and radioactive waste. Silica optical fibres play an important role thanks to their high radiation hardness. Moreover, rare earths may be incorporated to optimise the scintillation properties (emission spectrum, decay time) according to the particular application. This makes doped silica optical fibres a very versatile tool for the detection of ionizing radiation in many contexts. Among the fields of application of optical fibre sensors, radiation therapy represents a driving force for the research and development of new devices. In this review the recent progresses in the development of rare earth doped silica fibres for dosimetry in the medical field are described. After a general description of advantages and challenges for the use of optical fibre based dosimeter during radiation therapy treatment and diagnostic irradiations, the features of the incorporation of rare earths in the silica matrix in order to prepare radioluminescent optical fibre sensors are presented and discussed. In the last part of this paper, recent results obtained by using cerium, europium, and ytterbium doped silica optical fibres in radiation therapy applications are reviewed.

Ground-state and excited-state absorption in rare-earth doped optical fibres

1990 ◽  
Vol 26 (5) ◽  
pp. 320 ◽  
Author(s):  
M. Monerie ◽  
T. Georges ◽  
P.L. Francois ◽  
J.Y. Allain ◽  
D. Neveux
Keyword(s):  
Rare Earth ◽  
Excited State ◽  
Ground State ◽  
Excited State Absorption ◽  
Optical Fibres ◽  
Rare Earth Doped

scholarly journals Luminescence characteristics of rare-earth-doped barium hexafluorogermanate BaGeF6 nanowires: fast subnanosecond decay time and high sensitivity in H2O2 detection

RSC Advances ◽  
2018 ◽  
Vol 8 (69) ◽  
pp. 39296-39306 ◽  
Author(s):  
Gibin George ◽  
Machael D. Simpson ◽  
Bhoj R. Gautam ◽  
Dong Fang ◽  
Jinfang Peng ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Decay Time ◽  
High Sensitivity ◽  
H2o2 Detection ◽  
Highly Sensitive ◽  
Inorganic Scintillators ◽  
Luminescence Characteristics ◽  
Rare Earth Doped

The decay time of BaGeF6 nanowires codoped with rare earths is found in the order of subnanoseconds, being one of the shortest decay time records from inorganic scintillators. Their luminescence emissions are highly sensitive for H2O2 detection.

Structural and Optical Properties of Rare-Earth Doped Lithium Niobate Waveguides Formed by Mev Helium Implantation

1995 ◽  
Vol 396 ◽  
Author(s):  
B. Herreros ◽  
G. Lifante ◽  
F. CussÓ ◽  
A. Kling ◽  
J.C. Soares ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Rare Earths ◽  
Optical Waveguides ◽  
Bulk Material ◽  
High Energy ◽  
Structural And Optical Properties ◽  
Lattice Damage ◽  
Helium Implantation ◽  
Er Doped ◽  
Rare Earth Doped

AbstractResults of investigations of optical waveguides formed by high energy helium implantation into lithium niobate codoped with 5 mol% MgO and 1 mol% Tm3+ or 1 mol% Er3+ are reported. A comparative study of structural and luminescence properties between implanted and untreated samples has been performed by means of Rutherford backscattering (RBS) combined with channeling and photoluminescence methods, respectively in order to investigate residual lattice damage and the incorporation of the optical active rare earths. For the case of Tm a full substitutional incorporation on the lithium site and a high crystal quality in both bulk and implanted waveguide material has been found. For Er doped lithium niobate the channeling results show a fraction of Er randomly incorporated or forming precipitates and a deterioration of the waveguide's lattice. The optical investigations show in both cases only a slight broadening of the emission lines of the rare earths in the waveguides compared to the bulk material.

Rare-earth doped tellurite glass optical fibre for visible light sources

2011 ◽  
Author(s):  
Joris Lousteau ◽  
Nadia Boetti ◽  
Davide Negro ◽  
Emanuele Mura ◽  
Gerardo Scarpignato ◽  
...  
Keyword(s):  
Rare Earth ◽  
Visible Light ◽  
Optical Fibre ◽  
Tellurite Glass ◽  
Light Sources ◽  
Rare Earth Doped

scholarly journals Solution-doping technique for fabrication of rare-earth-doped optical fibres

1987 ◽  
Vol 23 (7) ◽  
pp. 329 ◽  
Author(s):  
J.E. Townsend ◽  
S.B. Poole ◽  
D.N. Payne
Keyword(s):  
Rare Earth ◽  
Optical Fibres ◽  
Doping Technique ◽  
Rare Earth Doped ◽  
Solution Doping

scholarly journals Properties of Specialist Fibres and Bragg Gratings for Optical Fiber Sensors

2009 ◽  
Vol 2009 ◽  
pp. 1-17 ◽  
Author(s):  
John Canning
Keyword(s):  
Optical Fiber ◽  
Optical Fibre ◽  
Bragg Gratings ◽  
Optical Fiber Sensors ◽  
Optical Fibres ◽  
Research Directions ◽  
Fiber Sensors ◽  
Optical Fibre Sensors ◽  
New Directions ◽  
Temperature Strain

The advent of optical fibres based on air holes running along their entirety opens up new directions in addressing various properties relevant to sensing, including the temperature/strain challenge of optical fibre sensors. This paper looks at the measurement challenges associated with temperature and strain, examines the potentially unique functionality structured fibre designs with and without gratings open up, and briefly describes some current research directions within conventional fibre and grating technologies.

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