COMPONENT AND METHOD FOR CONVERTING MODULATION FORMAT OF OPTICAL SIGNAL

摘要

Provided are a component and method for converting the modulation format of optical signals. The component comprises a first nonlinear silicon-based optical waveguide, a first MMI, a second MMI, and a third MMI. The first MMI divides a first light pulse into a first light pulse beam and a second light pulse beam. The second MMI is used for coupling two OOK optical signals with one of the light pulse beams into a first coupled optical signal. The third MMI is used for coupling another two OOK optical signals with the other of the light pulse beams into a second coupled optical signal. The first nonlinear silicon-based optical waveguide cross-phase modulates the first coupled optical signal into a first QPSK optical signal and cross-phase modulates the second coupled optical signal into a second QPSK optical signal. The first MMI synthesizes the first QPSK optical signal and the second QPSK optical signal into a first 16-QAM optical and outputs same. The described technical solution increases the rate of conversion of the modulation format of optical signals.