Fiber optic attenuators are utilized in networking applications where an optical signal is just too strong and wishes to be reduced.
There are many applications where this arises, like wanting to equalize
the channel strength during a multi-wavelength system or reducing the amplitude
to satisfy the input specifications of an optical receiver. In both scenarios,
reducing the optical signal strength is important alternatively system
performance issues may arise. MPO tester is useful.
Taken by optical attenuators, many firms may be the 2 basic sorts of
fiber optic attenuators that are variable and fixed. During this article, we'll
specialize in the fixed type.
The further classification of fixed attenuators is
- In-line patch
cord
- Build - out
style
Approximately 1.25 inches is the size of the build-out attenuator. Many
have a male interface connector at one end and a female interface connector at
the opposite end but female to female interface connectors also are available.
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The fabrication of the build-out style is usually accomplished using an air gap
attenuation or doped fiber attenuation.
The loss of optical power can be accomplished by Air gap attenuators
with the assistance of two fibers that are separated by air to yield the loss.
These attenuators are often variable or fixed, but to dust contamination, the downside is that they will be susceptible and also are susceptible to change
moisture and temperatures. One must even be cautious where they're used. For
instance, multi-channel analog systems, like ones employed by CATV, this
a variable optical attenuator can create second-order
distortions that reduce the performance of the system.
As the name suggests, alongside metal ion doping, doped fiber
attenuators contain a little fiber piece that provides the precise interfaces
and attenuation in between male and female connections on the attenuators.
These types are often wavelength sensitive due to their fabrication. The first
reasons, why these doped fiber attenuators are preferred, include:
Provide a stable performance over wide bandpasses and wavelength
variations.
Not vulnerable to dirt, moisture, or temperature variations
