FIBEROPTICS

The future is the development of today !

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Historical approach to our TPE

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In the beginning, man used the sun, the lights or smoke signals to transmit message.

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The first structured network of telecommunications.

Whether using visual signals or sound signals, the man has always tried to overcome distance and set up a rapid transmission of information.

The optical telegraph

Example : Optical telegraph Inventor :Claude chappe

Historical approach to our TPE

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The development of the multimedia need a higher flow of information

transmission.

Suddenly the optical fiber filled this role of transmission very well.

The emergence of new services

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Internet users

FIBER OPTICS

Communication

Transmission of large amounts of information in the highest quality

The emergence of new services

Our problematic is :

How does the optical fiber allow the transmission of large amounts of

information in the highest quality?

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SUMMARY Of “ TPE “

I. Fiber optics

-Functioning Technology

-Different types of fibre

-Avantages

II. Transmission of informations

- Transmission

- Fiber connections

Conclusion

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1. Functioning Technology

It is composed of two separate parts:

-an optical part that channels andpropagates light

-a mechanical protection layer calledthe primary coating withoutpropagation function

125 μm

Optical part Protective coating

250 μm

Structure of bare optical fiber:

To understand better

the optical fiber works by

refraction.

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Environment A

Environment B

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Wavelengths used for the optical fiber (located in the invisible)

2. Two modes for fiber optics

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Multimode fiber Single mode fiber-First technic used

-Easy to use but limited bandwidth

-Reserved to use at short distances

-High bandwidth

-Expensive Components-Universal solution for long distances

3. The benefits of the fiber optics

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Modern telecommunications largely rely fiber optics because

they have very great advantages over copper cables.

Low intensity loss rate

Average life cycle

is 20 years

Bandwidth: 100 GHZ

Cost

security

Light weight

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1. Transceivers

Transceivers have functions of converting theelectrical pulses into light signals sent in theoptical fiber.

Light signals are transmitted by a transmitterand then the light signal is read by aphototransistor or a photodiode.

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2.WDM (Wavelength Division Multiplexing)

This technique is called of emitting different wavelengths or each light ray then passes through a multiplexer which brings them into one.

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CONCLUSIONOf fiber

optics project

Fiber optics now allows many

customers to have a throughput of up to 100GHz

among individuals 10THz in some

companies.

With technology WDM, it’s still

possible to improve the

capacity of the optical fiber.

The distance with very little

influence on the loss of flow,

because it have a very good quality

of bandwidth.

Consequence: The copper circuits may

disappear in the near future.

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A WORK BY :PRAVHEEN & ALEXANDRE

Tale STI2D B