fiber optic hadling

its critical to certify fiber connector end face to prevent insertion loss

What is Insertion Loss?

Insertion loss is the amount of energy that a signal loses as it travels along a cable link. It is a natural phenomenon that occurs for any type of transmission—whether it's electricity or data. This reduction of signal, also called attenuation, is directly related to the length of a cable—the longer the cable, the greater the insertion loss. Insertion loss is also caused by any connection points along a cable link (i.e., connectors and splices).

Fiber link certification

Insertion loss Example

Testing insertion loss with a Fluke Networks’ CertiFiber Pro OLTS provides an easy pass/fail indication based on the type of fiber under test and the application test limits, indicating the overall loss of the link and the length. As shown in the insertion loss example below, the dotted line indicates what’s included in the measurement and the “Detail” window shows the margin and allowable limits for the fiber at both wavelengths.

Insertion Loss Testing Procedure for Optical Fiber

Insertion loss testing in today’s multimode fiber optic systems requires the use of encircled flux (EF) launch conditions to reduce measurement uncertainty. This method controls how the light is launched into a fiber under test to prevent an overfilled launch that can potentially cause a pessimistic result or an underfilled launch that can result in an optimistic result. Fluke Networks only provides EF-compliant testers and test reference cords for 850 nm and 1300 nm for all multimode fiber types. Learn more about EF compliance.

The default testing procedure for insertion loss testing is the 1-jumper method that includes the loss of the connections at both ends, which is ultimately how the cabling plant will be used. To accurately test the loss of the first and last connectors, they must be mated to a similar, known quality connector using Test Reference Cords (TRCs). TRCs are high quality test cords that are terminated with reference grade connectors and optical alignment of fiber cores that exhibit an extremely low loss of less than 0.2 dB for single-mode and less than 0.1 dB for multimode. Typical fiber jumpers used for normal day-to-day patching range between 0.3 dB and 0.5 dB and should not be used for testing.

To account for the loss of the TRC, an OLTS must be calibrated to 0 dB of loss by setting a reference—a concept similar to placing a bowl on a scale and then calibrating the scale to zero to achieve an accurate weight for whatever is in the bowl. 

consult a fiber professional

we can help you with fiber testing and certification. Having issues with an existing fiber link, fiber interface module showing high threshold values. 

the solution is easy, we can fix it