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Fiber Optical Attenuator
 
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1550nm 1G fiber optic transceiver

What is variable attenuator?

The variable attenuator generally uses a variable neutral density filter. A variable attenuator is made by fiber which is mixed metal ion; it can adjust the optical power to the level required. The most accurate variable attenuator instruments have thousands of calibration points, resulting in excellent overall accuracy in use.
The variable attenuator usually applied in optical communication, optical fiber CATV and testing high power light device.