Noise Power Measurement in Optical PowerMeter

[RAMON GUTIERREZ CASTREJON]

Hi guys

The Optical Power Meter module in OptiSystem shows the power of a sampled signal and the power of the noise. It is clear how the former is calculated. However, can anybody help me telling me how the Noise Power is calculated (I assume) from the noise bins in the Optical Power Meter module? I am trying to match the values shown by the Optical Power Meter module with those I calculate from the corresponding signal after being downloaded to Matlab.

Thank you very much in advance.

Ramon

[Ahmad Atieh]

Hello Ramon,
The power meter measures average power. However, OSA measure power spectral density (PSD). So, the noise bins have PSD data, which needs to be multiplied by the noise bin bandwidth and averaged out over the total bandwidth to get same power measured by the power meter. The noise bandwidth parameter can be read from the attached image.
Please try the calculation, if you have not manage to get correct answer, please contact me at ahmad.atieh@optiwave.com for further discussions.
Regards,
Ahmad

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