Patent ID: 6157762
Filing Date: 2000-12-05
Classification: G02F,H04B

Abstract:
A method for recovering the initial shape of soliton-shaped optical pulses having a chosen wavelength which have undergone nonadiabatic distortions as a result of propagation through a length, z.sub.a, of optical fiber, which comprises the steps of:(a) selecting the length, z.sub.a, of optical fiber to be the distance said soliton-shaped optical pulses must travel before reaching a nonlinear amplifying loop mirror such that the loss parameter, .gamma., where ##EQU16## is less than unity, where L.sub.dB is the power loss coefficient, thereby determining the values of the parameters A.sub.opt and .eta..sub.opt ;(b) generating soliton-shaped pulses having a peak power, P.sub.peak, where ##EQU17## where n.sub.2 is the nonlinear Kerr coefficient and A.sub.eff is the effective area of the fiber, and having a pulse width, t.sub.s, where ##EQU18## (c) directing said soliton-shaped pulses into said optical fiber; and (d) selecting the gain of the nonlinear amplifying loop mirror such that the peak power of said soliton-shaped pulses passing through said nonlinear amplifying loop mirror is cubed, with the result that the peak power and pulse width of said soliton-shaped pulses are restored to the originally generated values thereof.