RETURN LOSS & INSERTION LOSS Meters Testing Machine patch cord and pigtail manufacture line

Mefiberoptic offers a range of return loss and insertion loss test equipment in single channel, multichannel and bi-directional configurations To Check the finished patch cable insertion loss and Return Loss in patch cord and pigtail production line .Insertion Loss (IL) and Return Loss (RL) Meters build on the well proven capabilities of the fastest RL meters in the industry

 

Insertion & Return loss tester patch cord and pigtail 8600S
Insertion & Return loss tester patch cord and pigtail 8600S

The condition and characteristics of fiber optic connectors greatly affects the performance of an installed fiber optic link. High connector loss (e.g., insertion loss), low return loss, or high reflectance will impair an application (i.e. 10GBASE-LRM) from running on a network. A high return loss is a good thing and usually results in low insertion loss. Let’s examine the differences between these three terms because they can be confusing.

Optical loss (for connectors), sometimes called attenuation, is simply the reduction of optical power induced by transmission through a medium such as a pair of fiber optic connectors. Return loss is the amount of light reflected from a single discontinuity in an optical fiber link such as a connector pair. Return loss is also called reflectance. For perfect transmission, optical loss and reflected power should be zero.

The equations for optical loss, return loss and reflectance are as follows:

Optical Loss = 10*log(input power/output power) in +dB
Return Loss = 10*log(incident power/reflected power) in +dB
Reflectance = 10*log(reflected power/incident power) in -dB
Return loss and reflectance are both used to describe back reflection at a connector pair. However, one has a negative dB sign and one has a positive dB sign. Perhaps reflectance has its origins in the electrical world where return loss having a negative sign is more properly called the reflection coefficient.