What is a fiber attenuator and when do i need it
                     What is a fiber attenuator and when do i 
need it
A fiber attenuator also referred to as optical attenuator, is a tool used to reduce the extent of an optical 
energy sign in an optical fiber network for various purpose. Optical attenuators are frequently used in 
fiber optic communications, to check energy degree limits and for the time being including an adjusted 
amount of sign loss, they're also used to put in it all the time to as it should be suit transmitter and 
receiver sensitivity levels. If a obtained sign energy degree is simply too high, a temporary answer is to 
wrap the cable round a pencil or a similar item till the desired degree of attenuation is reached. Severe 
bends strain optic fibers and may reason losses of mild travelled internal these. Though, such answers 
are unpredictable, because the stressed fiber be likely to to break over time.
The power lessening is completed by such means as absorption, scattering, diffusion, deflection, 
reflection, diffraction, and dispersion, etc. Optical attenuators typically work by absorbing the light, like 
sunglasses take in more light energy. They usually have a operating wavelength variety wherein they 
take in all of the light energy. An optical attenuator ought to now no longer scatter or mirror the mild in 
an air gap, as that would purpose undesirable returned mirrored image in the fiber. A different form of 
attenuator exploits a period of an optical fiber with high-loss, that form of attenuator features upon its 
enter optical sign power stage in one of these manner that its output signal electricity level is much less 
than the enter level.
Optical attenuators can take different arrangements and are normally classified as fixed or variable 
attenuators.
Fixed Attenuators
Fixed optical attenuators used in fiber optic network may use a diversity of rules for his or her operation.
Desired attenuators use cloth among misaligned splices, or doped-fibers, or overall strength as each of 
those are dependable and low-priced. In-line type of attenuators is combined into patch cables. The 
change build-out style attenuator is a small male-female adapter that may be delivered onto different 
cables.
Non-desired attenuators frequently use hole loss or reflective principles. Such devices may be touchy to:
wavelength, modal distribution, impurity, temperature, vibration, may purpose again reflections, may 
purpose sign dispersion etc.
Loopback attenuators
Loopback fiber optic attenuator is meant for testing, engineering and the burn-in segment of forums or 
different equipment. Offered in LC/UPC, LC/APC, SC/UPC, SC/APC, MTRJ and MPO for single mode 
application.
Built-in variable attenuators
Built-in variable optical attenuators might be electrically controlled or manually controlled, depending 
upon type. An electrically managed attenuator can deliver adaptive electricity optimization. As 
compared to an automatic, a manually managed attenuator is useful for one time set up of a system, 
and is sort of alike to a fixed attenuator, and may be said to as a variable attenuator.
Variable optical test attenuators
Variable optical test attenuators commonly use an adjustable neutral density filter. Regardless of 
comparatively excessive price, this type has the advantages of being constant, wavelength insensitive, 
mode insensitive, and proposing a large dynamic range. Other systems together with LCD, variable air 
hole etc. were tried over the years, however with partial accomplishment. These types of attenuators 
can be manually or motor controlled. Motor manage attenuators provide everyday customers a 
different productivity advantage, because commonly used test sequences may be run automatically.
Attenuator tuning is a main concern. The person naturally would like a total port to port correction. Also,
calibration ought to frequently be at different wavelengths and electricity levels, because the device is 
not all of the time linear. Nevertheless, some of tools do now no longer in truth offers these basic 
features, apparently for you to lower cost. The maximum unique variable attenuator devices have 
hundreds of tuning points, resulting in super overall accuracy in use.
https://www.gbic-shop.de/