The document discusses attenuation in fiber optics, which refers to the loss of light energy as a signal travels through a cable, impacting the number of repeaters needed. It explains the use of fiber optic attenuators to manage optical power levels and outlines their applications for optimizing performance and protecting equipment. Additionally, it categorizes attenuators into fixed and variable types, detailing their adjustment methods.

2. 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.

3. 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

4. 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.

5. 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

6. ATTENUATION APPLICATION (3)
To regulate fluctuating optical power
levels in optical networks

7. ATTENUATION APPLICATION (4)
To regulate the output power of erbium doped fiber amplifier

8. 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

9. Manually Variable vs. Automatically
Variable
Manually Variable Attenuators are adjusted by hand
while
Automatically variable attenuators are adjusted by an electric signals.

10. FIBER OPTIC TRAINING
IN
LAGOS
NIGERIA
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