Question

Difference between input return loss output return loss

Answer 1

Return loss. In telecommunications,return loss is the loss of power in thesignal returned/reflected by a discontinuity in a transmission line or optical fiber. This discontinuity can be a mismatch with the terminating load or with a device inserted in the line. ... A match is good if the return loss is high.

Answer 2

Return loss is a measurement of the light reflected back to the source at an optical interface. The higher the return loss, the better the performance. Insertion loss is different from return loss, which refers to the measurement for the amount of optical power loss through a mated pair, the lower the insertion loss, the better the performance.

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