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       #Post#: 29--------------------------------------------------
       Optical Attenuator Types and Applications
       By: AnnieHunter Date: August 21, 2018, 5:11 am
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       Optical attenuator is a very essential fiber optic passive
       additives. It’s an necessary device for fiber CATV. So far the
       marketplace has shaped 4 series which can be fixed-step,
       variable, continuously variable and smart optical attenuator.
       Types of Optical Attenuators
       A. Displacement Optical Attenuator
       As all of us understand, when the 2 sections of optical fiber
       connection, have to meet a without a doubt excessive accuracy,
       in an effort to make the optical signal a smaller loss
       transmission previously. Conversely, when the fiber to help make
       the proper changes within the precision, you could manage the
       quantity of attenuation. Displacement-kind optical attenuator is
       based totally on this principle, the purpose of the fiber in the
       butt, the appearance of positive dislocation. The sunshine
       electricity loss, for you to attain the purpose of a controlled
       amount of attenuation, the displacement-type optical attenuator
       is split into two types: the lateral displacement kind optical
       attenuator, the axial displacement of the optical attenuator.
       The lateral displacement from the optical attenuator is a
       classical method, due to the significance from the lateral
       displacement parameters within the micron stage, so generally do
       no longer should produce a variable attenuator is used simplest
       for producing fixed attenuator, and the use of welding or stick
       connection, there may be still a great marketplace, the
       advantage of high return loss, typically more than 60 dB. Axial
       displacement kind optical attenuator by using mechanical manner
       so long as the procedure layout of two optical fibers a sure
       distance with the goal, is possible attenuation. This precept is
       specially employed for generating fixed optical attenuator and a
       few small variable optical attenuator.
       B. Thin-film Optical Attenuator
       This attenuator is created whilst using precept of sunshine
       within the contemplated mild awareness of the top of metallic
       thin movie film thickness. When the thickness from the metal
       thin movie deposited around the glass substrate is sure,
       fabricated from a hard and fast optical attenuator. Different
       attenuation may be obtained if inner a exceptional thickness of
       a disk-shaped metallic thin wax glass substrate, metallic skinny
       film, so that inserted in the optical street to unique
       thicknesses so that you can alter the intensity of the reflected
       mild inside the optical fiber inserted obliquely deposited Cover
       made from the variable attenuator.
       C. Attenuation-sheet Optical Attenuator
       Attenuation the chip kind optical attenuator at once constant
       attenuator thru an absorption characteristic in the long run
       surface of the optical fiber or maybe the optical direction to
       reap the reason for the attenuation from the optical sign, this
       manner cannot surely be used to supply a fixed optical
       attenuator also can be used to supply the variable optical
       attenuator.
       Applications of Optical attenuators
       A set optical attenuator fixed amount of attenuation of the
       optical road to the sunshine energy is principally used for its
       remarkable temperature traits. Within the commissioning from the
       system, widely utilized in analog optical signal thru the
       corresponding duration of optical fiber attenuation or reduce
       the margin from the optical strength the relay station can also
       be used to save you saturation from the optical receiver;
       optical test tool calibration scaling. For different line
       interface, you can use exclusive fixed attenuator; if the
       interface is without a doubt a pigtail type available pigtail
       type optical attenuator welded in the direction of the optical
       route between the two sections of fiber; If you're debugging the
       system connector interface converter or inverter-type constant
       attenuator.
       In sensible applications regularly require attenuation amount of
       the optical attenuator can be modified the use of the user
       needs. Therefore, a much wider range of making use of the
       variable attenuator. For instance, EDFA, CATV optical machine
       layout margin of the specific product is not quite the
       identical, the optical strength margin of the gadget BER
       assessment, to prevent the receiver is saturated, it have to be
       inserted in the gadget variable optical attenuator, some other ,
       fiber optics (together with a electricity meter or OTDR)
       dimension, calibration will also make use of the variable
       attenuator. From the perspective of market call for, on the one
       hand, the optical attenuator improvement closer to
       miniaturization, serialization, low charge course. However,
       because of the common type optical attenuator, optical
       attenuator is development path closer to excessive-performance,
       clever optical attenuator, excessive return loss optical
       attenuator.
       Source: 10GtekStore
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