ATTENUATION IN

FIBER.Attenuation means loss of light energy as the light pulse travels from one

end of the cable to the other. It is also called as signal loss or fiber loss. It

also decides the number of repeaters required between transmitter and

receiver. Attenuation is directly proportional to the length of the cable.

These are used in optical systems where the optical power from a source is too

high for the equipment in use. A fiber optic attenuator reduces the power of an

optical signal travelling through the attenuator without distorting the waveform

Optical Fiber Attenuators

ATTENUATION

APPLICATION (1)To reduce optical power at the optical receiver for improved

performance or to stay within the dynamic range of the optical

receiver.

ATTENUATION APPLICATION (2)

To reduce optical power after the optical transmitter to stay

within the dynamic range of optical components in the fiber

optic link or to prevent damage from the high power optical

signals

ATTENUATION APPLICATION (3)

To regulate fluctuating optical power

levels in optical networks

ATTENUATION APPLICATION (4)

To regulate the output power of erbium doped fiber amplifier

Categories and sub-categories of

fiber optic attenuator.

FIXED VS. VARIABLE : only one attenuation

value is possible for fixed attenuators while

the attenuation value of variable attenuators

can be adjusted

Manually Variable vs. Automatically

Variable

Manually Variable Attenuators are adjusted by hand

while

Automatically variable attenuators are adjusted by an electric signals.

FIBER OPTIC TRAINING

IN

LAGOS

NIGERIA

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