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What does the modulation rate of laser mean?

Baud rate, that is, modulation rate, refers to the change of signal in unit time after modulation, that is, the number of changes of carrier parameters in unit time. It is the unit of measurement of symbol transmission rate, and 1 baud means 1 symbol per second. The unit "Potter" itself represents the modulation number per second, and it is a common mistake to take Potter per second as the unit.