Ultrafast all-optical ALU operation using a soliton control within the cascaded InGaAsP/InP microring circuits

Abstract

A dark-bright soliton conversion is used to perform the two arithmetic logic unit(ALU) operations namely adder and subtractor operations. The advantage of the system such as power stability, non-dispersion and the dark-bright soliton phase conversion control can be obtained. The input source into the circuit is the bright soliton pulse, with the pulse width of 35 ps, the peak power at 1.55 µm is 1 mW. By using the dark-bright soliton conversion pair, the generated logic bits can be controlled, and the secure bits can be achieved. The simulation results show the output signal with a minimum loss of only 0.1% with respect to a low input power of 1 mW, and ultra-fast response time of about 0.30 ps can be achieved. It gives the ultra-high bandwidth of more than 40 Gbits-1. The circuit composes 6 microring resonators made of InGaAsP/InP material with smaller ring radii of 1.5 µm, and the total physical scale of the circuit less than 100 2 .

Generation and manipulation of bright spatial bound-soliton pairs under the diffusion effect in photovoltaic photorefractive crystals*

“…[10] Lan et al also investigated a non-autonomous generalized AB system, and found that the two short waves and mean flow can appear as the solitary waves. [11] These various phenomena undoubtedly illustrate that optical solitons are excellent candidates to realize alloptical switching and routing, [12][13][14][15] which are key technologies for all-optical communication network based on light controlling light. Until now, optical solitons have been studied, which can exist in many kinds of nonlinear optical materials such as Kerr medium, [16,17] photorefractive (PR) crystal, [18][19][20][21] and liquid crystal.…”