LC/SC/FC/ST Plug-in fixed (female to male) attenuator

LC/SC/FC/ST Plug-in fixed (female to male) attenuator

CO Subsystem

Product Detail

Product Tags

Fixed Female to male attenuator

Fixed Female to male attenuators from OMC offer defined control of optical signals in both integrated and add-on products.

Depending on the project or need, fixed attenuators can limit (attenuate) the amount of light passing through to the exact levels your project or application requirement.These precise attenuation levels provide for highly accurate performance.

OMC fixed attenuators are used in applications where a pre-determined amount of light loss is specified. Though its applications range widely, fixed attenuators are most commonly used for test and measurement, optical sensors, and telecommunications applications.


Fiber Connector


Connector Gender

Fixed Male to Female

Transfer Mode




Operating Wavelength(nm)


Attenuation Accuracy


Return loss

≥ 55dB

Max Optical Input Power


Operating Temp Range


Polarization Dependent Loss

≤ 0.2dB

Storage Temp Range




Features & Benefits

Fully compatible with LC fiber optic connectors

Precise attenuation values

Industry standard attenuation levels

Low PDL and insertion loss

Precision polishing for reduced back reflection

Highly Reliable Physical Contact Connectors

Compartmentalized case provides safe component storage and simple organization

Small, durable case for easy portability

RoHS compliant



Ø DWDM applications

Ø Test & measurement

Ø  Optical sensors

Ø Telecommunications applications


Why Use Attenuators?

The ability of any fiber optic system to transmit data ultimately depends on the optical power at the receiver as shown below, which shows the data link bit error rate as a function of optical power at the receiver. (BER is the inverse of signal-to-noise ratio, e.g. high BER means poor signal to noise ratio.) Either too little or too much power will cause high bit error rates.

Too much power, and the receiver amplifier saturates, too little and noise becomes a problem as it interferes with the signal. Fiber optic attenuators are mainly used for adjusting the Optical Power to a desired level. Attenuators are available in models with variable attenuation or with fixed values from a few dB to 20 dB or more.

Does Multimode or Singlemode Systems need attenuators?

Generally, multimode systems do not need attenuators, because multimode sources rarely have enough power output to saturate receivers. Singlemode systems, especially short links, often have too much power and need attenuators.

For single mode applications, the most important specification, after the correct loss value, is return loss or reflectance! Choose a type of attenuator with good reflectance specifications and always install the attenuator (X in the drawing) as shown at the receiver end of the link. This is because it’s more convenient to test the receiver power before and after attenuation or while adjusting it with your power meter at the receiver, plus any reflectance will be attenuated on its path back to the source.

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