Integrated Fibre Optic Subsea System

2009 ◽  
Vol 42 (4) ◽  
pp. 107-112
Author(s):  
Kjetil Johannessen ◽  
Jon Steinar Andreassen ◽  
Sigurd Moe
Keyword(s):  
Control Systems ◽  
Optical Fibre ◽  
Digital Communication ◽  
Holistic Approach ◽  
Fibre Optic ◽  
Analogue Signals ◽  
Telecom Industry

StatoilHydro, Weatherford, FMC Technologies and Nexans Norway are cooperating in a project called Integrated Fibre Optic Subsea System (IFOSS), where multiple aspects of utilizing optical fibre subsea for enhancing bandwidth and reach are addressed, when compared to conventional control systems. The project scope includes utilizing techniques and components from the telecom industry. A holistic approach is taken to include digital communication and transport of analogue signals from fibre based sensors.

scholarly journals Implications of information theory in optical fibre communications

2016 ◽  
Vol 374 (2062) ◽  
pp. 20140438 ◽  
Author(s):  
Erik Agrell ◽  
Alex Alvarado ◽  
Frank R. Kschischang
Keyword(s):  
Information Theory ◽  
Optical Fibre ◽  
Optical Fibres ◽  
Limited Capacity ◽  
Fibre Optic ◽  
Precious Resource ◽  
Basic Concepts

Recent decades have witnessed steady improvements in our ability to harness the information-carrying capability of optical fibres. Will this process continue, or will progress eventually stall? Information theory predicts that all channels have a limited capacity depending on the available transmission resources, and thus it is inevitable that the pace of improvements will slow. However, information theory also provides insights into how transmission resources should, in principle, best be exploited, and thus may serve as a guide for where to look for better ways to squeeze more out of a precious resource. This tutorial paper reviews the basic concepts of information theory and their application in fibre-optic communications.

The Spectrum of a Bent Fiber Fabry-Perot Interferometer under Small Variations of the Refractive Index of the Environment

2013 ◽  
Vol 677 ◽  
pp. 363-367
Author(s):  
Yuri N. Kulchin ◽  
Oleg B. Vitrik ◽  
Stanislav O. Gurbatov
Keyword(s):  
Refractive Index ◽  
Optical Fibre ◽  
Ambient Medium ◽  
Fibre Optic ◽  
Core Mode ◽  
Wide Range ◽  
Fabry Perot ◽  
Resonance Coupling ◽  
Refractive Index Sensors

The phase of light propagating through a bent optical fibre is shown to depend on the refractive index of the medium surrounding the fibre cladding when there is resonance coupling between the guided core mode and cladding modes. This shifts the spectral maxima in the bent fibre-optic Fabry–Perot interferometer. The highest phase and spectral sensitivities achieved with this interferometer configuration are 0,71 and 0,077, respectively, and enable changes in the refractive index of the ambient medium down to 5∙10–6 to be detected. This makes the proposed approach potentially attractive for producing highly stable, precision refractive index sensors capable of solving a wide range of liquid refractometry problems.

Multicore optical fibre and fibre-optic delay line based on it

2016 ◽  
Vol 46 (12) ◽  
pp. 1134-1138 ◽  
Author(s):  
O N Egorova ◽  
M S Astapovich ◽  
M E Belkin ◽  
S L Semjonov
Keyword(s):  
Optical Fibre ◽  
Delay Line ◽  
Fibre Optic
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