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Topic: Fibre optics


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In the News (Thu 20 Jun 19)

  
  Ulearn Today - Magazine   (Site not responding. Last check: 2007-11-06)
Optical fibres are arguably one of the world’s most influential scientific developments of the latter half of the 20th century.
Advanced optical fibres rely on either coating on glass fibres (being wrapped in a shroud of a different glass) or the implanting of charged chemicals known as ions into their surface.
Fibre optics are also used to carry high power laser beams from fixed installations within factories to the point of use of the laser light for welding, cutting or drilling.
www.ulearntoday.com /magazine/physics_article1.jsp?FILE=fibreoptics   (1442 words)

  
 optical fibre   (Site not responding. Last check: 2007-11-06)
Fibre optics are also used in endoscopes (instruments used to visualize the body’s organs), in which different bundles of fibres are used to illuminate the area under examination and to transmit the image.
Optical fibres are increasingly being used to replace metal communications cables, the messages being encoded as digital pulses of light rather than as fluctuating electric current.
Bundles of optical fibres are also used in endoscopes to inspect otherwise inaccessible parts of machines or of the living body (see endoscopy).
www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0005088.html   (312 words)

  
 Optical fiber - Wikipedia, the free encyclopedia
An optical fiber (also spelled fibre) is a transparent thin fiber, usually made of glass or plastic, for transmitting light.
One technique for the manufacture of optic fibers is the Modified Chemical Vapour Deposition technique, where a hollow glass tube approximately 40cm in length known as a "preform" is placed horizontally and rotated slowly on a lathe.
ST, SC and MTRJ are types of fibre optic cable jacks or connectors.
en.wikipedia.org /wiki/Optical_fiber   (2019 words)

  
 Bluebell Opticom Ltd - broadcast fibre optic solutions | fibre optics glossary   (Site not responding. Last check: 2007-11-06)
A type of connector used on fibre optic cable utilising a spring loaded twist and lock coupling similar to the BNC connectors used with coaxial cabling.
An optical fibre, either multimode or single mode, in which the core refractive index is uniform throughout so that a sharp step in refractive index occurs at the core-to-cladding interface.
That part of a fibre optic cable composed of aramid yarn, steel strands, or fibreglass filaments that increase the tensile strength of the cable.
www.bluebellcomms.co.uk /glossaryS.html   (624 words)

  
 fibre optics --  Encyclopædia Britannica   (Site not responding. Last check: 2007-11-06)
In telecommunications, fibre optic technology has virtually replaced copper wire in long-distance telephone lines, and it is used to link computers within local area networks.
Fibre optics is also the basis of the fibrescopes used in examining internal parts of...
In the eye, the nerve forms from the convergence of visual nerve fibres in the optic disk at the rear of the eyeball.
www.britannica.com /eb/article-9034170?tocId=9034170   (898 words)

  
 Communications Or Control Using Plastic Fibre Optics   (Site not responding. Last check: 2007-11-06)
It is true that plastic fibre optic communications is not the answer to all data communication problems, but it does have definite advantages for the designer over other data communication systems.
Installation is simply done by cutting the plastic fibre optic cable with a razor knife and inserting it into the screw connector on the device, no grinding or polishing needed.
The plastic fibre optic transmitter for a control device is simply an LED and resistor with the resistor value being determined by the voltage of the supply.
daqlabs.com /pfo.html   (800 words)

  
 The Fibre Optic Company (Lighting)
Fibre optic lighting has changed somewhat since it's begginings 15 years ago, back then the scope of fibre optic lighting had barley progressed away from those sixties table lamps and fibre optic Christmas trees.
We designed and manufactured a Linear fibre system using 100w MHR projectors and 200m of solid core side lit fibre, this system was unique as it incorporated both glass and polymer fibre elements.
This website is designed to give insight into our most successful fibre optic lighting systems and hopefully give some intelligent illustration of the benefits and scope for fibre as an utterly fantastic lighting tool.
www.fibreoptico.com   (417 words)

  
 CompuPhase fibre optics
It is essential that the fibre endpoints in the optical coupling are sufficiently polished to minimize loss of light energy at the entry point.
This coupling holds 228 fibres with a diameter of 0.75 mm each; the dark circular spot in the middle of the optical coupling is the polished surface of the bundle of 228 fibres.
For fibre optics, the light source is a projector with a strong lamp, usually Tungsten.
www.compuphase.com /fiberoptics_en.htm   (694 words)

  
 Fibre Optic Basics
In 1870, John Tyndall demonstrated that light follows the curve of a stream of water pouring from a container, it was this simple principle that led to the study and development of applications for this phenomenon.
The numbers represent the diameters of the fibre core and cladding, these are measured in microns which are millionths of a metre.
Loose tube fibre cable can be indoor or outdoor, or both, the outdoor cables usually have the tube filled with gel to act as a moisture barrier which stops the ingress of water.
www.datacottage.com /nch/fibre.htm   (1232 words)

  
 Fibre-optics bundles (from optics) --  Encyclopædia Britannica
An ordered bundle of rods or fibres is thus capable of taking an image projected upon one end of the bundle and reproducing it at the other end.
degeneration of the optic (second cranial) nerve, which carries visual data from the retina of the eye to a relay station in the centre of the brain (the lateral geniculate body) for transmission to a cortical area at the back of the brain.
Optics, the study of light, is a diverse field of science concerned with how light is produced and transmitted and how it interacts with matter.
www.britannica.com /eb/article-37969?tocId=37969   (990 words)

  
 3M(TM) Volition(TM) Network Solutions - Why Fibre Optics   (Site not responding. Last check: 2007-11-06)
Fibre optic cabling means the end of EMI and EMC interference.
Volition™ Fibre Optic Cabling has a tensile strength that is 4 times greater than copper cable, a tighter bend radii, weighs far less, is easier to pull, and installs faster.
Fibre optic cables are thinner and weigh far less than copper cables, which generates lower infrastructure costs, reduces conduit usage and increases the probability of making better use of your existing investment.
www.3m.com /CA/english/market/volition/whyfibreoptics.jhtml   (618 words)

  
 Introduction   (Site not responding. Last check: 2007-11-06)
Optical Fibres are fibres of glass, usually about 120 micrometres in diameter, which are used to carry signals in the form of pulses of light over distances up to 50 km without the need for repeaters.
Optical fibres cannot be joined (spliced) together as a easily as copper cable and requires additional training of personnel and expensive precision splicing and measurement equipment
Multimode fibre is commonly used as the "backbone" to carry signals between the hubs of LAN's from where copper coaxial cable takes the data to the desktop.
floti.bell.ac.uk /MathsPhysics/introduction.htm   (521 words)

  
 CBC News:Ocean sponge can spin better fibre optics   (Site not responding. Last check: 2007-11-06)
The sponge adds traces of sodium to the glass fibres, which increase their ability to conduct light, something that can't be done at high temperatures, said Joanna Aizenburg, who led the research for Bell Labs.
The glass fibres, or spicules, grow at the top and bottom of the sponge and appear to anchor the organism to the ocean floor.
While manufactured fibre optics are brittle and crack easily when bent, the sponge's spicules have braces that toughen the structure.
www.cbc.ca /stories/2003/08/20/sponge_fibres030820   (316 words)

  
 Deutsch | Press Releases | Fibre Optics
Deutsch's RSC range of high performance fibre optic connectors are manufactured from Arcap for corrosion resistance, and feature a rugged construction, incorporating environmental sealing and an anti-vibration coupling mechanism.
Fibre Optic experts, Ray Vine and David Carman, both Programme Managers at Deutsch Ltd in Hastings, were invited to Airbus Deutschland Gmbh in Hamburg to train Airbus personnel in fibre optic technology application.
This ensures ultimate performance when using small core single mode fibre, and is particularly suitable where payout fibre is used in fibre optic towed decoy applications.
www.deutschltd.com /html/press/fib.asp   (1531 words)

  
 PDM Fibre Optic Connectors & Penetrators
Fibre optic technology is becoming common in offshore and harsh environment applications in order to satisfy the demands for increased bandwidth and communication speed.
Fibre optic connectors have been available for a number of years but typically utilising expanded beam technology which does introduce high optical loss.
The PDM fibre optic underwater penetrator can also offer the advantage of full waterblocking so even if the in-water section of the cable is damaged the water will not penetrate the connected equipment.
www.pdmneptec.com /fibropt.htm   (370 words)

  
 Introduction to Fiber Optics Part 1 (including video transmission for a/v)
The basic point-to-point fiber optic transmission system consists of three basic elements: the optical transmitter, the fiber optic cable and the optical receiver.
Fiber optic transmission systems - a fiber optic transmitter and receiver, connected by fiber optic cable - offer a wide range of benefits not offered by traditional copper wire or coaxial cable.
Fiber optic cables are virtually unaffected by outdoor atmospheric conditions, allowing them to be lashed directly to telephone poles or existing electrical cables without concern for extraneous signal pickup.
www.commspecial.com /fiberguide.htm   (717 words)

  
 Analysis   (Site not responding. Last check: 2007-11-06)
The fundamental advantage of using fiber optics is speed and sheer magnitude of data transfer as compared to traditional copper cables or other signal medium.
Even at the stellar speeds of fiber optics now, new optical components are being developed that can dramatically increase the amount of data transfer through existing fiber optic circuits and thus increase total data transfer speeds.
Provide a brief history of fiber optics in order to introduce fiber optics to those who may be unfamiliar with the age and developments in the technology.
isds.bus.lsu.edu /cvoc/projects/techlibrary/Fiber/Analysis.html   (2638 words)

  
 fibre optics --  Britannica Concise Encyclopedia - Your gateway to all Britannica has to offer!
Thin transparent fibres of glass or plastic that transmit light through their length by internal reflections, used for transmitting data, voice, and images.
Telecommunication using fibre optics is usually conducted with infrared light.
Fibre optics uses light in the visible wavelengths to transmit images directly, in various technical devices such as those developed for endoscopy.
concise.britannica.com /ebc/article-9364386?tocId=9364386   (877 words)

  
 Introduction to Fibre Optics
Fibre is an integral part of modern day communication infrastucture and can be found along roads, in buildings, hospitals and machinary.
The fibre itself is a strand of silica based glass, it's dimensions similar to those of a human hair, surrounded by a transparent cladding.
The loss along the fibre is low and the signal is not subject to electromagnetic interference which plagues other methods of signal transmission, such as radio or copper wire links.
www.jb.man.ac.uk /research/fibre/intro2fibre.htm   (711 words)

  
 FibreOptic Light and Design Ltd, New Zealand
Fibre Optics are precision engineered, flexible cables, manufactured in a wide range of specifications in glass or polymer.
Fibre optic lighting provides the technology to put the mystery and magic back into our surroundings, either in breathtaking visual displays that no other products can convey, or subtle lighting effects that are striking in their simplicity.
Fibre optics are capable of delivering light to multiple points of illumination from a single light driver, making them economical to run.
www.fibreoptic.co.nz /fibreoptics.html   (686 words)

  
 Let There Be Light. Scoping with fibre optics.
If this sounds familiar it may be time to enter the world of fibre optics, where bulbs cost less then a movie ticket and, more importantly, the illumination is brighter and cooler than any conventional tungsten illumination system.
With fibre optics it is the "active" fibre tip, not the filament, that is imaged in the focal plane of the objective (picture 1).
In cross section, a fibre optic light transfer cable consists of a central core made up of hundreds of very fine glass filaments cemented together to form a bundle which is wrapped in a flexible protective outer jacket or cable.
www.microscopy-uk.org.uk /mag/artmar04/rnfibre.html   (1364 words)

  
 The educational encyclopedia, cabling, fibers, fiber optics   (Site not responding. Last check: 2007-11-06)
Fibre optics optical Fibres are fibres of glass, usually about 120 micrometres in diameter, which are used to carry signals in the form of pulses of light over distances up to 50 km without the need for repeaters.
Fiber optics fiber optics is a medium for carrying information from one point to another in the form of light.
Fiber optics tutorial optical fibers are circular dielectric waveguides that can transport optical energy and information, fibers are typically made of silica with index-modifying dopants.
users.telenet.be /educypedia/electronics/cablingfibers.htm   (537 words)

  
 Fibre Optics   (Site not responding. Last check: 2007-11-06)
Light is transmitted by a bundle of optical fibres and/or a coiled length of plastic rod, regardless of the twists and turns in the path it must negotiate.
The bundle of fibres can be looped and twisted or tied in a knot without impeding the passage of light.
The laser, fibre bundle, and plastic coil are all hand-held during the demonstration and need only to be set out on the bench.
www.fas.harvard.edu /~scdiroff/lds/LightOptics/FiberOptics/FiberOptics.html   (212 words)

  
 Fiber Optic Cable Tutorial
Fiber optic cable functions as a "light guide," guiding the light introduced at one end of the cable through to the other end.
Even laser light shining through a fiber optic cable is subject to loss of strength, primarily through dispersion and scattering of the light, within the cable itself.
Fiber optic cable connectors and the equipment needed to install them are still more expensive than their copper counterparts.
www.arcelect.com /fibercable.htm   (3255 words)

  
 Computer Dealer News: Fibre optics dominates carrier market - communications transmission carriers   (Site not responding. Last check: 2007-11-06)
It is a relatively inexpensive means of transmitting large amounts of information on a highly reliable medium which is immune to signal interference and weather, both of which plague the other transmission media.
The four transmission carrier technologies are: fibre optics, satellite, microwave and copper cable.
Fibre optics account for the majority of revenues in the U.S. World revenues for this market were $9.5 billion in 1990, and MIRC forecasts revenues to reach $26 billion by 1997.
www.findarticles.com /p/articles/mi_m3563/is_n15_v8/ai_12881317   (433 words)

  
 Education/Interactive experiments/Optics resources - PhysicsWeb
Mode solver for planar dielectric multilayer waveguides - Following the definition of a 1-D dielectric waveguide in terms of refractive indices, layer thicknesses, and the vacuum wavelength, the applet calculates the propagation constants of guided modes and allows to inspect the corresponding optical field patterns.
Optics Bench - Simulate a standard optic bench with lenses, mirrors, dielectrics, and sources and observe the ways that light rays propagate through these elements.
Optics and Lenses Java Applet - Java Applet by Fu-Kwun Hwang that demonstrates properties of lenses.
physicsweb.org /resources/Education/Interactive_experiments/Optics   (1451 words)

  
 A Brief History of Fiber Optic Technology
The early work on fiber optic light source and detector was slow and often had to borrow technology developed for other reasons.
Fiber optics developed over the years in a series of generations that can be closely tied to wavelength.
The fiber optic feed, because of its quality and reliability, soon became the primary video feed, making the 1980 Winter Olympics the first fiber optic television transmission.
www.fiber-optics.info /fiber-history.htm   (2006 words)

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