The incident optical power of coherent 100G

Dear friend！
In general, optical signals with a higher data rate have a lower tolerance for fiber nonlinear effects.
100G coherent signals have severe non-linear effects than non-coherent 10G signals. Therefore, the incident optical power of coherent 100G single wavelengths must be decreased. The optical power at the IN optical port on a 100G OTU board must be within the range of -12 dBm to -5 dBm.

For more information,  please read the following topics:

Coherent Transmission System Special Topics

Thanks！

Friend,

Coherent channels work at a lower power. Usually -6 to -12 dbm. This is because they are not affected by non-linear effects.