Patent ID: 9500933
Filing Date: 2016-11-22
CPC Classification: G02F,H04Q

Claim Text:
1. A method for operating a logical gate using at least one or more delayed optical routers comprising a nonlinear optical medium, wherein the nonlinear optical medium comprises two closely spaced ground states such that a transition between the two ground states is dipole forbidden, and an excited state such that two-photon transitions between the two ground states via the excited state are allowed, the method comprising: using at least one of a slow light (S) and a non-degenerate four-wave mixing signal (D) as a result of Boolean algebra, wherein the slow light (S) is appeared by applying, to the nonlinear optical medium, a first laser beam (P) with a first frequency corresponding to a first transition between a first ground state of the two ground states and the excited state and a second laser beam (C) with a second frequency corresponding to a second transition between a second ground state of the two ground states and the excited state; and the non-degenerate four-wave mixing signal (D) is appeared by applying, to the nonlinear optical medium, the first laser beam (P) with the first frequency, the second laser beam (C) with the second frequency and a third laser beam (A) with a third frequency corresponding to the second transition, wherein the first laser beam (P) and the third laser beam (A) correspond to inputs of a Boolean NOT algebra, and the appearance or disappearance of the slow light (S) corresponds to a result of the Boolean NOT algebra.