Temporal dissipative soliton with controllable morphology in time-delayed coupled optoelectronic oscillator

A temporal dissipative soliton (TDS) with controllable morphology is demonstrated in a time-delayed coupled optoelectronic oscillator (OEO) driven by two optical carriers with different wavelengths. The morphology of the TDS is controlled by the power difference between the two optical carriers and the delay difference induced by the group-velocity dispersion (GVD) in the OEO loop. When the delay difference is small, the OEO operates in a single-soliton state. With the increase of the wavelength interval between the two optical carriers, the delay difference becomes significant so that various compound TDS structures are observed, where the TDS interval is equal to the delay difference. The morphology of the compound TDSs can be switched between a pulsating TDS packet and a stable compound TDS structure by further tuning the power difference between the two optical carriers. This discovery not only facilitates the investigation of novel soliton dynamics but also provides a method for generating customized pulse waveforms.