All-optical pseudorandom bit sequences generator based on TOADs

•It is an all-optical system that gets rid of electronic bottleneck restrictions.•This scheme is suitable for ultra-cycle PRBS generation with a simple structure.•Its feasibility is verified by generation of RZ-OOK PRBS (263-1) at 1 Gb/s with a 10% duty radio.

A scheme for all-optical pseudorandom bit sequences (PRBS) generator is demonstrated with optical logic gate ‘XNOR’ and all-optical wavelength converter based on cascaded Tera-Hertz Optical Asymmetric Demultiplexer (TOADs). Its feasibility is verified by generation of return-to-zero on–off keying (RZ-OOK) 263-1 PRBS at the speed of 1 Gb/s with 10% duty radio. The high randomness of ultra-long cycle PRBS is validated by successfully passing the standard benchmark test.