1. Fixed Optical Attenuators - Single Mode or Multimode
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    Fixed Optical Attenuators - Single Mode or Multimode

    Model FOA
    Price:   US$18.99 US$14.99
    Available Options:
    Center Wavelength:
    Connector Type:
    Polish Type:

FOA is a plug-type single mode attenuator (multimode fiber attenuators also available). It is used directly on the fiber optic connectors and provides a fixed level of optical attenuation. It has low return loss and works at both 1310nm and 1550nm wavelength range (850nm or 1300nm for multimode fiber). FC and SC connector types with PC or APC polish are available, as well as ST and LC types of attenuators.

In addition to standard 1~25dB attenuation, we also provide FOA with high attenuation of 35dB.


  • Good repeatability
  • High precision
  • High return loss
  • Small size
  • Good directivity
  • FC, SC, ST and LC types available
  • High attenuation (35dB) available


  • Fiber communication
  • Fiber CATV
  • LAN
  • Test equipment


Single mode fiber attenuators

Multimode fiber attenuators

Ordering Information:

x: fiber type of the optical attenuator; x=S for 9/125 micron single mode fiber; x=M50 for 50/125 micron multimode fiber, etc.
a: ID of the operating wavelength; a=1310 for 1310nm, a=1550 for 1550nm, a=1315 for dual windows, etc.
b: Attenuation in dB; b=5 for 5dB attenuation; b=20 for 20dB attenuation, etc.
c: Connector type of the attenuator; c=FU for FC/UPC connector/adapter, c=STP for ST/PC connecctor/adapter, c=LU for LC/UPC connector/adapter, etc.

Example: FOA-S-1550-3-FA

Seel also: Variable optical attenuator and Variable Optical Attenuators - Adapter Type and Hybrid optical adapters