Nonlinear behavior of light such as chaos can be observed during propagation of a laser beam inside the microring resonator (MRR) systems. This Brief highlights the design of a system of MRRs to generate a series of logic codes. An optical soliton is used to generate an entangled photon. The ultra-short soliton pulses provide the required communication signals to generate a pair of polarization entangled photons required for quantum keys. In the frequency domain, MRRs can be used to generate optical millimetre-wave solitons with a broadband frequency of 0–100 GHz. The soliton signals are multiplexed and modulated with the logic codes to transmit the data via a network system. The soliton carriers play critical roles to transmit the data via an optical communication link and provide many applications in secured optical communications. Therefore, transmission of data information can be performed via a communication network using soliton pulse carriers. A system known as optical multiplexer can be used to increase the channel capacity and security of the signals.

Dr. I. S. Amiri, received his PhD degree in Nanophotonics from University Technology Malaysia (UTM). He has several publications in the area of Optical Soliton Communications, Nanophotonics, Nonlinear fiber optics, Quantum Cryptography, Optical Tweezers, Nanotechnology, Biomedical Physics and Biotechnology Engineering. He is currently a visiting research fellow in UTM.

Dr. Sayed Ehsan Alavi received his Ph.D. degree in electrical engineering from University Technology Malaysia (UTM), Malaysia. He has been working at the Lightwave Communication Research Group (LCRG) faculty of electrical engineering, UTM Johor as a researcher. His current research interests include digital communication, wireless communication, optical wireless communication, visible light communication and soliton based optical communication.

Dr. S. M. Idrus is faculty in the department of Electrical Engineering at University Technology Malaysia (UTM), Malaysia. She obtained her Ph.D from the University of Warwick Kingdom for work on optical free space communication systems. Her main research interests are optical transceiver design, optoelectronic circuit and radio over fiber system. Her research output was translated to a numbers of publications, including a high-end reference book, ‘Optical Wireless Communication: IR Connectivity’ published by Taylor and Francis, over 100 technical papers and has filed 30 patents.