First demonstration of a double cladding optical fiber utilizing a graded index multimode inner cladding and a single mode core for enhancing downhole distributed sensing techniques

2021 ◽  
Author(s):  
Andrew M. Gillooly ◽  
Gareth Lees ◽  
Laurence Cooper ◽  
Rogerio Ramos ◽  
Myles Heather ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Single Mode ◽  
Distributed Sensing ◽  
Graded Index

Study on Coupling of Step and Graded Index Single Mode Optical Fiber Considering the Transverse Misalignment

2020 ◽  
Vol 8 (2) ◽  
pp. 78-82
Author(s):  
Prosenjit Roy Chowdhury ◽  
◽  
Keyword(s):  
Optical Fiber ◽  
Communication Systems ◽  
Structural Parameters ◽  
Fractional Power ◽  
Single Mode ◽  
Spot Size ◽  
Fiber Coupling ◽  
Fundamental Parameters ◽  
Graded Index ◽  
Wide Range

"Advance design and day to day up-gradation of communication system is the requirement of international telecommunication. The optical communication systems involve the effective fiber coupling or splicing to meet the need of long communication channel. When the studies on both the intensive and extensive properties of optical fiber are exploring new research horizons, the effectiveness of such systems can be calibrated with transmission parameters like transmitted fractional power, which is a function of ‘spot size’ as well. Our study of fiber junctions based on fundamental parameters like wavelength, fiber profile index etc. has touched some unrevealed areas and explored some interesting results. The profile index of optical fiber has received less attention compared to other structural parameters of optical fiber but our study at important wavelengths for different profiles has shown that the less-used fiber profiles has some interesting premier outcomes, which can introduce some significant impact on optical fiber based system design and engineering. We have observed almost frequency or wavelength independent transmitted fractional power around the most used 1.55 micrometer wavelengths at some rarely used fiber profile index. Our study predicts the best and worst fiber profiles for transmitted fractional power (T ), at the same time, we have observed the fiber profile index independent region for a band of ‘T’ values. The reporting and its approach are found to be premier in this field. So, our work is reporting a comparison of effective fiber-to-fiber coupling, based on fiber profile index of different fibers. It is also giving a clear view of the wavelength dependency of effective fiber coupling for different fibers having wide range of graded fiber profiles."

Multigigabit/s perfluorinated graded-index plastic-optical-fiber data links with butt-coupled single-mode InGaAs VCSEL

1999 ◽  
Author(s):  
Felix Mederer ◽  
Roland Jaeger ◽  
Peter Schnitzer ◽  
Heiko J. Unold ◽  
Max Kicherer ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Single Mode ◽  
Plastic Optical Fiber ◽  
Graded Index ◽  
Data Links

Integration of Nanoparticles Into and Onto Optical Fiber Sensors

2005 ◽  
Vol 900 ◽  
Author(s):  
A. Dhawan ◽  
J. F. Muth
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Single Mode ◽  
Optical Fiber Sensors ◽  
Optical Switches ◽  
Nano Particles ◽  
Fiber Sensors ◽  
Graded Index ◽  
Wide Range ◽  
Beam Deposition

ABSTRACTMetallic and semi-conducting nano-particles were incorporated into and on the surface of optical fibers to form sensors and other optoelectronic devices on standard telecommunications grade optical fibers. Optical fibers provide a macroscopic platform to exploit the wide range of functionality inherent in nanostructures and nano-particles. Several ways of forming sensitive and robust chemical sensors, based on plasmon resonances of metallic islands and nano-particles, were demonstrated. These nano-particles were formed on tip or surface of the optical fibers by thermal or plasma arc annealing of very thin (4 -12 nm) gold films, that were deposited by electron beam deposition and sputtering. Development of in-line optical fiber structures, involving single mode or multimode optical fibers fused to an arrangement of coreless and graded index fibers, was also carried out. This enabled light propagating in the core of the optical fiber to expand to the surface of the coreless fiber and to effectively interact with nano-particles on the surface and the environment. Metallic and semiconducting nano-particles were also incorporated inside an optical fiber matrix and this could enable us to effectively characterize novel materials and possibly form optical switches. Moreover, these optical fiber sensors and devices were integrated into textile structures to explore the possibility of formation of optoelectronic textiles.

Low-loss coupling between two single-mode optical fibers with different mode-field diameters using a graded-index multimode optical fiber

2011 ◽  
Vol 36 (18) ◽  
pp. 3596 ◽  
Author(s):  
Arash Mafi ◽  
Peter Hofmann ◽  
Clémence Jollivet Salvin ◽  
Axel Schülzgen
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Single Mode ◽  
Low Loss ◽  
Multimode Optical Fiber ◽  
Graded Index ◽  
Mode Field

Analysis of graded-index polymer optical fiber link performance under fiber bending

2005 ◽  
Vol 23 (6) ◽  
pp. 2062-2072 ◽  
Author(s):  
K. Makino ◽  
T. Nakamura ◽  
T. Ishigure ◽  
Y. Koike
Keyword(s):  
Optical Fiber ◽  
Polymer Optical Fiber ◽  
Graded Index ◽  
Link Performance ◽  
Fiber Link
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