Home Forums SYSTEM 16 QAM Transmitter

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• #54303
Participant

Hello everyone
The insertion loss in each MZM in 16 QAM Transmitter is 6.6 dB . I ask if anyone interpret this loss where is come from?
Thank you

• #54370
Moderator

Can you please explain how did you measure the insertion loss of each MZM?
You need to understand that the optical signal is going to be distributed over the 16 QAM signals. The electrical field of each signal of 16QAM has different amplitude and phase. If you add the optical power of all signals, you must reach the original optical signal power if there is no insertion loss set for any optical component used to create the 16QAM optical signal.
Regards,

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• #54371
Participant

Thank you Mr Ahmed
I fed the MZM by 0 dB that founded in 16 QAM Transmitter in one of Optisystem example. But I set the Insertion loss parameter to 0 dB after that I measure the output signal -6.6 dBm, So I find in Binary system the output is -3 dBm because MZM in the on / off situations. I know the distribution of power in 16 QAM but I need to mathematical explanations if anyone can do?
Thank you for all

• #54383