Photobleaching Effects In Step Index Pure Silica Optical Fibers During In-Situ Irradiation At Low Temperatures

1988 ◽  
Author(s):  
A H. Johnston ◽  
B D. Evans ◽  
M P. Baze ◽  
R A. Greenwell
Keyword(s):  
Optical Fibers ◽  
Low Temperatures ◽  
Step Index ◽  
Pure Silica

In situ Tensile Experiments at Low Temperatures on Niobium Single Crystals by H.V.E.M.

1975 ◽  
Vol 33 ◽  
pp. 58-59
Author(s):  
F. H. Louchet ◽  
L. P. Kubin
Keyword(s):  
Electron Microscope ◽  
Transition Temperature ◽  
Low Temperature ◽  
Slip System ◽  
Low Temperatures ◽  
Tensile Axis ◽  
Image Intensifier ◽  
Screw Dislocations ◽  
Source Operation

Experiments have been carried out on the 3 MeV electron microscope in Toulouse. The low temperature straining holder has been previously described Images given by an image intensifier are recorded on magnetic tape.The microtensile niobium samples are cut in a plane with the two operative slip directions [111] and lying in the foil plane. The tensile axis is near [011].Our results concern:- The transition temperature of niobium near 220 K: at this temperature and below an increasing difference appears between the mobilities of the screw and edge portions of dislocations loops. Source operation and interactions between screw dislocations of different slip system have been recorded.

“In-Situ Raman Spectroscopy of Electronic Processes in Fullerene Thin Films

2002 ◽  
Vol 725 ◽  
Author(s):  
S.B. Phelan ◽  
B.S. O'Connell ◽  
G. Farrell ◽  
G. Chambers ◽  
H.J. Byrne
Keyword(s):  
Thin Film ◽  
Indium Tin Oxide ◽  
Low Temperatures ◽  
In Situ Raman Spectroscopy ◽  
State Reduction ◽  
In Situ Raman ◽  
Linear Behavior ◽  
Current Voltage ◽  
Solid State Reduction

AbstractThe current voltage characteristics of C60 thin film sandwich structures fabricated by vacuum deposition on indium tin oxide (ITO) with an aluminium top electrode are presented and discussed. A strongly non-linear behavior and a sharp increase in the device conductivity was observed at relatively low voltages (∼2V), at both room and low temperatures (20K). At room temperature the system is seen to collapse, and in situ Raman measurements indicate a solid state reduction of the fullerene thin film to form a polymeric state. The high conductivity state was seen to be stable at elevated voltages and low temperatures. This state is seen to be reversible with the application of high voltages. At these high voltages the C60 film was seen to sporadically emit white light at randomly localized points analogous to the much documented Electroluminescence in single crystals.

Influence of measurement noise on the determination of the radial profile of the photoelastic coefficient in step-index optical fibers

2013 ◽  
Vol 52 (35) ◽  
pp. 8451 ◽  
Author(s):  
Sophie Acheroy ◽  
Patrick Merken ◽  
Heidi Ottevaere ◽  
Thomas Geernaert ◽  
Hugo Thienpont ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Radial Profile ◽  
Measurement Noise ◽  
Step Index

Discrete Multitone Modulation for Maximizing Transmission Rate in Step-Index Plastic Optical Fibers

2009 ◽  
Vol 27 (11) ◽  
pp. 1503-1513 ◽  
Author(s):  
S.C.J. Lee ◽  
F. Breyer ◽  
S. Randel ◽  
R. Gaudino ◽  
G. Bosco ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Transmission Rate ◽  
Discrete Multitone ◽  
Step Index ◽  
Plastic Optical Fibers

Calculation of the coupling coefficient in step index glass optical fibers

2009 ◽  
Vol 48 (22) ◽  
pp. 4496 ◽  
Author(s):  
Svetislav Savović ◽  
Alexandar Djordjevich
Keyword(s):  
Optical Fibers ◽  
Coupling Coefficient ◽  
Step Index

scholarly journals Global characterization of optical power propagation in step-index plastic optical fibers

2006 ◽  
Vol 14 (20) ◽  
pp. 9028 ◽  
Author(s):  
Javier Mateo ◽  
M. Angeles Losada ◽  
Ignacio Garcés ◽  
Joseba Zubia
Keyword(s):  
Optical Fibers ◽  
Optical Power ◽  
Step Index ◽  
Plastic Optical Fibers
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