The in-line variable optical attenuator (VOA) is manually-adjusted, used for precisely balancing the signal strengths in fiber circuits, or balancing an optical signal when evaluating the dynamic range of the measurement system.
Key Features
High Precise attenuation value
Perfect environmental stability and reliability
Low additional loss
Flawless end face
Wide attenuation range (variable)
Applications
Fiber optical telecommunication system
FTTH, CATV, LAN
Subscriber loop
Fiber optical sensor
Testing equipment
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Data Communications 
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