Question

Different types of modulation techniques in optical fiber communication

Answer 1

The most common digital modulation techniques are:
. Phase-shift keying (PSK) ...
. Frequency-shift keying (FSK) ...
. Amplitude-shift keying (ASK)
. On-off keying (OOK), the most common ASK form. ...
. Quadrature amplitude modulation (QAM), a combination of PSK and ASK. ...
. Continuous phase modulation (CPM) methods.