Fiber Optic Attenuators

Fiber Optic Attenuators are used in the fiber optic communications to reduce the optical fiber power at a certain value, the most commonly used type is female to male fiber optic attenuator, it has the optical fiber connector at one side and a female type fiber optic adapter at the other, inside, there is a piece of attenuation optical fiber, and the fiber optic attenuator name is based on the connector type and the attenuation value.

Available in both inline and terminator/build-out styles, SINO OPTIC’s fixed attenuators offer multiple options including SC, LC, ST, FC, and MU connector types and definable attenuation values from 1db to 30dB.

Fixed Attenuators from SINO OPTIC provide defined control of optical signals in both integrated and add-on products. Depending on the project or need, fixed attenuators can limit, or attenuate, the amount of light passing through to the exact level your project or application requires.



Ferrule Type

Zirconia Ceramic 

Attenuation Value

1dB to 30dB

Operating Wavelength

1240nm to 1620nm (SM)​​ 

850nm/1310nm/1550nm (MM)

Return Loss

UPC ≥55dB

APC​​ ≥65dB

Attenuation Accuracy


Polarization Dependent Loss


Maximum Optical Input Power


​​ Mechanical Durability

1000 Cycles

Operating Temperature

-40ºC to 85ºC





  • 1-30 dB values definable

  • Wavelength insensitive

  • Available with singlemode, multimode, and PM versions

  • Available with LC, SC, FC, ST, MU and E2000 terminations

  • Available with PC, UPC, and APC polish



  • DWDM

  • Optical sensors

  • Test & measurement

  • Telecommunications



  • RoHS