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LC/APC Singlemode Fixed Fiber Optic Attenuator, Male-Female, 25dB
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LC/APC Singlemode Fixed Fiber Optic Attenuator, Male-Female, 25dB


Our single-mode fixed fiber optic attenuators offer low return loss, high mode stability and a variety of attenuation values.

Shipping Cost:
US$  21.00 to United States Via FedEx
US$  3.60
Availability: Available, Estimated on Fri. Oct. 7
There may be some difference between the estimated time and the actual time.
Item Details
Fiber Connector LC/APC Connector Gender Fixed Male to Female
Transfer Mode Singlemode Attenuation 25dB
Operating Wavelength(nm) 1260~1620(SM) Attenuation Accuracy 1-5dB ±0.5, 6-10dB ±0.7, >10dB ±1.0
Return loss ≥ 65dB Max Optical Input Power 200mW
Operating Temp Range -40~80°C Polarization Dependent Loss ≤ 0.2dB
Storage Temp Range -40~85°C Humidity 95%RH
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
Package option: in a compact plastic box with individual compartments and corresponding labels showing different attenuation, which is for easy portability. Contact us at for customizing your attenuators package.
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 a singlemode 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.

Customer Reviews
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Choudhury May 4,2015
Fast shipping and amazing customer service. Very good company.
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Jack Rojas April 4,2015
Very easy site to use and very efficient. Also the lowest prices for this p[articular item I have found.
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William Womble March 25,2015
Absolutely wonderful folks to deal with and brilliant pricing on some pretty hard to find items.
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Christopher Britt March 2,2015
I havent tested the equipment yet, but it all looks brand new without a scratch. I will shop with them again.
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John Cardenas February 19,2015
Was contacted by their sales department, and product arrived quickly!
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Michael Poindexter January 12,2015
This company is spot on, all the time they are fast and accurate.
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Kyle Forman December 28,2014
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Donald Egan November 30,2014
Their website is easy to use and their service is excellent.
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Robert Molina November 13,2014
Package arrived on time. Thanks
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