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09-04-2011, 09:33 AM
Post: #9
RE: optical fiber communication full report
Sana Rao

.ppt  Sana29.ppt (Size: 1.89 MB / Downloads: 110)
 Alexander Graham Bell patented an optical telephone system called the photo phone in 1880 .
That same year, William Wheeler invented a system of light pipes.
 Optical Fibers are thins long (km) strands of ultra pure glass (silica) or plastic that can to transmit light from one end to an other.
 Basic Information
What is Optical Fiber Cable?
Optical cables used to transmit light signals over long distances.
It has basic three parts:
 Working of Optical fibers?
 TX
 RX
Principle of operation
 Dielectric (nonconducting ) that transmits light along its axis
 Total internal reflection.
 Refractive index
 Step-index fiber
 Graded-index fiber.
Optical Fiber Classification
Can be classified in a number of ways
 On the basis of manufacturing
 On the basis of profile
Types of Optical Fiber
There are two basic types of fiber:
 Multi Mode Optical Fiber:
Used to transmit many signals per fiber (Multi Mode generally are used for in computer networks, LAN applications)
 Single Mode Optical Fiber:
Used to transmit one signal per fiber (Single Mode generally are used for in telephones and cable TV applications)
Types of fiber optic cable of structures
 Glass Optical Fiber:
Glass fiber-optic cable has a Glass core and cladding.
 Plastic Optical Fiber (POF):
Plastic fiber-optic cable has a plastic core and cladding.
 Plastic Coated Silica Cable:
(PCS). PCS fiber-optic cable has a Glass core and Plastic cladding.
 Telephone Systems
 Internet
 Video Feeds
 Medical Operations
 Home Theater Systems
 Optical fiber communication
 Optical fiber can be used as a medium for telecommunication and networking because it is flexible and can be bundled as cables .
 Over short distances.
 Medical
 Defense/Government
 Data Storage
 Telecommunications
Fiber is laid and used for transmitting and receiving purposes
 Networking
Used to connect users and servers.
 Industrial/Commercial
 Broadcast/CATV
 • SPEED: Fiber optic networks operate at high speeds - up into the gigabits
 • BANDWIDTH: large carrying capacity
 • DISTANCE: Signals can be transmitted further without needing to be "refreshed" or strengthened.
 • RESISTANCE: Greater resistance to electromagnetic noise such as radios, motors or other nearby cables
 • MAINTENANCE: Fiber optic cables costs much less to maintain.
Disadvantages of Fiber Optic Cabling
 Adding additional nodes is difficult
 Cost of transmission equipment is Higher than copper
 Cost of installation is Higher than copper
 Difficult to Install
 Expensive over short distance (less 5 km)
 Requires highly skilled installers
12-04-2011, 10:15 AM
Post: #10
RE: optical fiber communication full report

Modern fiber-optic communication systems generally include an optical transmitter to convert an electrical signal into an optical signal to send into the optical fiber, a cable containing bundles of multiple optical fibers that is routed through underground conduits and buildings, multiple kinds of amplifiers, and an optical receiver to recover the signal as an electrical signal. The data transmitted is typically digital data generated by computers, telephone systems, and cable television companies.
The most commonly-used optical transmitters are semiconductor devices such as light-emitting diodes (LEDs) and laser diodes. The difference between LEDs and laser diodes is that LEDs produce incoherent light, while laser diodes produce coherent light. For use in optical communications, semiconductor optical transmitters must be designed to be compact, efficient, and reliable, while operating in an optimal wavelength range, and directly modulated at high frequencies. The main component of an optical receiver is a photodetector, which converts light into electricity using the photoelectric effect. The photodetector is typically a semiconductor-based photodiode. Several types of photodiodes include p-n photodiodes, a p-i-n photodiodes, and avalanche photodiodes. Metal-semiconductor-metal (MSM) photodetectors are also used due to their suitability for circuit integration in regenerators and wavelength-division multiplexers. An optical fiber consists of a core, cladding, and a buffer (a protective outer coating), in which the cladding guides the light along the core by using the method of total internal reflection. The core and the cladding (which has a lower-refractive-index) are usually made of high-quality silica glass, although they can both be made of plastic as well. Connecting two optical fibers is done by fusion splicing or mechanical splicing and requires special skills and interconnection technology due to the microscopic precision required to align the fiber cores.
• Due to much lower attenuation and interference, optical fiber has large advantages over existing copper wire in long-distance and high-demand applications.
• Optical fiber is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals.
• Since 2000, the prices for fiber-optic communications have dropped considerably. The price for rolling out fiber to the home has currently become more cost-effective than that of rolling out a copper based network. Prices have dropped to $850 per subscriber in the US and lower in countries like The Netherlands, where digging costs are low.
29-06-2011, 06:15 PM
Post: #11
RE: optical fiber communication full report
hi please send me seminar report
25-08-2011, 10:44 AM
Post: #12
RE: optical fiber communication full report

.pptx  manish tailor presentation.pptx (Size: 1.26 MB / Downloads: 117)
What is Communication ??
What is Optical Fiber ?

Optical fibers are thin, transparent strands almost the size of a human hair made from a dielectric cylinder surrounded by another transparent dielectric cylinder
Optic fiber is made up of 3 parts :
Core, Cladding and jacket
The inner most part is the core which contains one or more thin fibers that are made up of plastic or glass
Each of the fiber in the core is covered by a cladding which has different optical properties from the core
The outer most part of the optical fiber is made up of plastic or other materials ,which is called the jacket
How does it work ?
You hear about fiber-optic cables whenever people talk about the telephone system, the cable TV system or the Internet. Fiber-optic lines are strands of optically pure glass as thin as a human hair that carry digital information over long distances.
The light in a fiber-optic cable travels through the core by constantly bouncing from the mirror-lined walls, ……………total internal reflection.
The reflections inside the walls are possible because of high refractive index material of the inner cylinder.
Optical communication system
Transmitter. Converts electrical signal into light signal.
Optical fiber. Conducts the light signal over the distance.
Optical regenerator. May be required to boost the light signal for longer distances.
Optical receiver. Converts light signals back to electrical signal.
Typical Optical communication system.
Electric signal In
Optical Regenerator
Optical Receiver
How Are Optical Fibers Made?
How Does an Optical Fiber Transmit Light?
Advantages of using optical fiber
Less expensive.
Less volume (thinner than copper wires).
Higher capacity.
Less signal degradation.
No interference between two signals.
Low power.
Some applications use fiber optics for the communication
Military Application
21-03-2012, 10:41 AM
Post: #13
RE: optical fiber communication full report
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25-08-2012, 09:07 PM
Post: #14
RE: optical fiber communication full report
can u please send me full report of optical fiber communication word format
14-03-2015, 08:19 AM
Post: #15
RE: optical fiber communication full report
nice report
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