Intercity connects and city networks providing high speed connections to terminals providing wireless services high speed 100 mbits and above services fttx, where x home etc. Step index fiber in step index fibers the refractive index of the core medium is uniform and undergoes an abrupt change at the interface of core and cladding as shown in figure. Optical fibre cable manufacturing process optical fibres in a cable are normally protected in one of two ways, either being tight buffered or contained in loose tubes. A fiber optic cable consists of a bundle of glass threads, each of which is capable of transmitting messages modulated onto light waves. As the fibre can be bent, light can thus be bent around corners by using optical fibres. Zafar iqbal, habib fathallah, nezih belhadj abstractoptical fiber communication is not as secure as generally perceived. History of optical fiber began with the invention of optical telegraph by french chappe brothers.
Multimode optical fiber is a type of optical fiber mostly used for communication over short distances. Optical fiber optical fiber or fiber optic refers to the medium and the technology associated with the transmission of information as light pulses along a glass or plastic strand or fiber. Optical fiber presentation free download as powerpoint presentation. Optical fiber carries much more information than conventional copper wire and is in general not subject to electromagnetic interference. If so, share your ppt presentation slides online with. Optical fiber communications is the property of its rightful owner. Csjma090104 ece 4rd year,uiet, kanpur submitted to.
Fiber optical communication lecture 1, slide 12 transatlantic cables fibers are used for high speed, long haul communication, but also for. Optical fiber optical fiber or fiber optic refers to the medium and the technology associated with the transmission of information as light. Fundamentals of fiber optic systems optical fibers guide light waves within the fiber material because light rays bend or change direction when they pass from one medium to another. Scribd is the worlds largest social reading and publishing site. Principles of optical fiber communications tutorialspoint. Optical fibers are made from silica which is an electrical insulator. Necessary to consider the optical waveguiding of a cylindrical. Optical losses extrinsic fiber losses bending losses. The digital communication techniques discussed so far have led to the advancement in the study of both optical and satellite communications. I have made this report file on the topic optical fiber communication. The principle of using optical fibres for image transmission was first used for internal medical examinations by h lamm in the 1930s. Fibre is an integral part of modern day communication infrastucture and can be found along roads, in buildings, hospitals and machinary.
Fiber types multimode fiber multimode fiber is so named by its large core. The basic law of light guidance is snells law figure 5. Several aspects of the nature of light light travels in a straight line as long as it is moving through a single uniform substance. Consider two dielectric media with different refractive indices and with n 1 n 2 and that are in perfect contact, as shown in figure 5. Ppt fiber optics powerpoint presentation free to download. Optical fiber has lower attenuation loss of signal intensity than copper conductors, allowing longer cable runs and fewer repeaters. Here you can download the optical fiber communication vtu notes pdf ofc pdf vtu of as per vtu syllabus. The purpose of this article is to provide the nontechnical reader with an overview of.
Everything you always wanted to know about optical. A technology that uses glass or plastic threads fibers to transmit data. Optical fiber ppt free download as powerpoint presentation. Dec 31, 2016 this is very useful to about optical fiber.
Laser modulation fiber communication systems typically employ some form of digital communication technique that requires the laser to be switched on to transmit a digital 1 and switched off to transmit a digital 0. When tight buffered the individual optical fibre is covered directly with a layer of thermoplastic material or one or more fibres can be contained within a loose tube which is filled. Notes on optical fibres and fibre bundles introduction this note has been prepared with the intention of putting of summarising salient facts about optical fibres. Modern optical fibres have a transparent cladding around the core to enhance light guidance. Single mode fibre calculate the diameter of a single mode fibre with n f1. The field of fibre optics communications has exploded over the past two decades. A free powerpoint ppt presentation displayed as a flash slide show on id. Once light enters the fibre, it moves in the same direction as the fibre. Light losses in fibres fibre is a transparent cylinder made of a dielectric. Ph 0101 unit3 lect 6 fiber optics basic principles physical structure of optical fibre propagation characteristics of optical fibre unit iii lecture 6 fiber optics. Incredible as this would have seemed just a few decades ago, these countries now produce more information than they do tangible products, relegating manufacturing to a secondary role in their. There are a number of known methods of extracting or. All structured data from the file and property namespaces is available under the creative commons cc0 license. Fiber optics do not emit sparks or cause short circuits, which is important in explosive gas or flammable environments.
A fibre optic relay system consists of the following components. Ppt optical fiber communications powerpoint presentation. Optical losses extrinsic fiber losses these losses are specific to geometry and handling of the fibers and are not functions of the fiber material itself. Files are available under licenses specified on their description page. An optical fiber is a thin, flexible, crystal clear fiber that acts as a waveguide. Fundamentals of photonics 296 2000 university of connecticut introduction since its invention in the early 1970s, the use of and demand for optical fiber have. The base and the coating are characterized by lower. A fiber optic cable is made of glass or plastic and transmits signals in the form of light several aspects of the nature of light. On the order of 50m and 65m, multimode fiber allows multiple raysmodes to couple and propagate simultaneously down the fiber as demonstrated in figure 5.
An optical fibers bandwidth can be thought of roughly as the highest number of pulses from a modulated light source that a receiver can detect. For long range communication system the loss limit was set to 20 dbkm was dbkm or higher at that time. Introduction to optical communication yatindra nath singh eeaces iit kanpur. Their task is to slightly increase and decrease the refractive. Plastic optical fibers pofs plastic optical fibers pofs are a lowcost solution for lowspeed, shortdistance applications in digital car networks, industrial networks, and home networks and appliances. The university of texas at austin september 30, 2011 optical fiber testing and measurements 27 08 103 1. Optical fiber presentation optical fiber transmission medium.
Optical telegraph is the system comprised of series of. An optical fiber or optical fibre is a flexible, transparent fiber made by drawing glass silica or plastic to a diameter slightly thicker than that of a hu slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. When tight buffered the individual optical fibre is covered directly with a layer of thermoplastic material or one or more. Optical fiber communication seminar and ppt with pdf report. Copper optical fiber transmits light pulses optical fiber transmits light pulses can be used for analog or digital can be used for analog or digital transmission transmission voice, computer data, video, etc. B findley industrial for internalexternal electrical work visit this website. The plastic optical fiber is made out of a plastic such as acrylic pmma as the core material and fluorinated or perfluorinated. The fiber which are used for optical communication are wave guides made of transparent dielectrics. B findley industrial for internalexternal electrical work visit this website manufacturing foundation latest developments in the manufacturing industry click here. The plastic optical fiber is made out of a plastic such as acrylic pmma as. I have tried my best to elucidate all the relevant detail to the topic to be included in the report. Optical fiber is a very thin strand of pure glass, which. Fiber ppt telecommunications equipment telecommunications.
An optical fiber can be understood as a dielectric waveguide, which operates at optical frequencies. Its function is to guide visible and infrared light over long distance. It follows a helical trajectory confined within a cylindrical shell of radii r and a. Optical fiber technology was considered to be a major driver behind the information. You can use this optical fiber template for communication presentations in power point but also to decorate other communication. Copper wires or other metals can copper wires or other metals can carry the same types of signals with carry the same types of signals with electrical pulses. While in the beginning i have tried to give a general view about this topic. For additional information on these and other industry related technologies, please visit us at. Basics of fiber optics mark curranbrian shirk fiber optics, which is the science of light transmission through very fine glass or plastic fibers, continues to be used in more and more applications due to its inherent advantages over copper conductors.
To transmit a digital 0 the laser is biased slightly above the threshold where the optical output power will be low. Fiber optics this lecture numerical aperture of optical fiber allowed modes in fibers attenuation distortion modal distortion material dispersion waveguide dispersion last lecture fourier analysis temporal coherence and line width partial coherence spatial coherence. Describe how light is guided through optical fibers. Fiber optic ppt pdf optical fiber transmission medium scribd. The projection of the ray on the transverse plane is a regular polygon that is not. Ed jim hayes jim hayes optical fiber optical fiber fiber v. The slide design has a hand over a blue background and the template has a grey background color.
Optical fiber communication vtu notes pdf ofc pdf vtu. Optical fiber powerpoint template is a free background for powerpoint presentations with an optical fiber image that you can download to decorate your presentations. An optical fiber is a hair thin cylindrical fiber of glass or any transparent dielectric medium. Although light signals do degrade over progressing distances, depending on the purity of the material used, the loss is much less compared to using metal cables.
In this lecture connectors what is amplitude modulation. Identify the basic components of a fiber optic communication system. Eos rooflights for market leading, energy efficient skylights and rooflights browse their site. The diameter of core is about 10micrometers in case of single mode fiber and 50 to 200 micrometers in multi mode fiber.
Limited since there are numerous textbooks and websites which are available for more. Necessary to consider the optical waveguiding of a cylindrical glass fiber. The optical carrier frequency is in the range 10 hz to 1015hz. Schoolphysics is an online resource base for all 11 to 19 year old physics and science students and their teachers. Arial calibri times new roman symbol times office theme optical fiber communications overview chapter 10 overview of wdm wdm spectral bands wdm standards 10. Most common material used in fibres is fused silica amorphous sio. Of course the selection of the characteristics presented is inevitably limited and biased. Light pulses can suffer broadening modal dispersion because of the different paths that light rays can take as they move along the fiber. My efforts and wholehearted cocorporation of each and everyone has ended on a successful note. The basic material used in the manufacture of optical. Discover everything scribd has to offer, including books and audiobooks from major publishers. Introduction to fiber optics what are optical fibers thin strands of pure glass carry data over long distances at very high speeds fiber can be bent or twisted fiber optic technology sources transmission medium detectors sources of light light emitting diodes lasers sources modulate electrical signals into optical signals mostly modulate at 850nm, 0nm and 1550 nm lasers give high intensity.
Physics at a glance, animations, exam specifications, data, diagrams, photographic images and more. Light rays travel continuously, bouncing off the optical fiber walls and transmitting end to end data. Optical fiber communication seminar ppt with pdf report. Fibre channel is a switched medium that works similar to a telephone network. Optical fiber communication ppt 6klzk92v9elg idocpub. The measured link attenuation shall be less than the link attenuation allowance. Optical fiber wave guiding to understand transmission mechanisms of optical fibers with dimensions approximating to those of a human hair. Planar waveguide is a rectangular block consisting of three layers. Below we have list all the links as per the modules.