A fiber optic variable attenuator is used to reduce the power level of an optical signal in fiber optic communications.


Depending on the type of optical attenuator, they can be used to test power level margins by adding a calibrated amount of signal loss, or can be installed permanently to match transmitter and receiver levels.


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Power reduction through an optical attenuator is typically done through absorption, reflection, diffusion, scattering, defection, diffraction, or dispersion. A fiber optic attenuator essentially absorbs light, akin to show sunglasses absorb certain light energies from the sun.

From a technician’s perspective, the right fiber optic variable attenuator is based on high precision, perfect for testing optical system margin and linearity. With the right specifications, this laboratory-grade instrument can help a great deal in verifying the connectivity of your system.

Beyond accurate readings in real-time, see features including class-leading data metrics, low minimum insertion loss, accurate loss accuracy, appropriate power handling capacity, attenuation unaffected by on/off status, and long battery life.

Test all fiber optic transmission systems, sub systems, and components. High-speed and high-power systems require optimized power handling, ORL, PMD, and PDL characteristics. GAOTek variable optical attenuators are used every day globally as an integral element of BER testing and EDFA characterization setups.

High quality and affordable optical attenuators are available from GAOTek for sale and application in the United States, Canada, and globally. Using our variable optical attenuators, browse a wide attenuation range and wide wave-length range, and get yours in the fiber optic connector of your choice.

GAOTek optical attenuators are high-performance, easy to use, and handheld ensuring you can take it wherever you need to go on-the-field. Designed for flexibility and in the most rugged environments, all of our optical attenuators come equipped with the latest technology and meeting all international quality standards. Choose your own GAOTek variable optical attenuator today.


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This Variable Optical Attenuator for CATV is a device useful for testing continuously variable optical signal attentuation in CATV systems.


This compact Variable Optical Attenuator is a portable device which has low insertion loss with wide attenuation range and is suitable for use in testing projects of optical transmission systems.


This optical attenuator is used in measuring parameters of fiber optical system, testing FTTX, and attenuating the short distance in fiber optical networks.


This variable optical attenuator is designed with single-mode fiber to continuously attenuate the optical signal and can be used in the digital systems of communication devices and CATV systems.