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We place an erbium-doped fiber amplifier (EDFA) in the interaction region between orthogonally polarized control and signal pulses to widen the timing window for a soliton-dragging logic gate (SDLG). In general, the two inputs to an SDLG must overlap within a pulse width to obtain a time shift at the device output However, by introducing gain during the interaction between the two pulses, we can asymmetrize the walk-off and, thereby, broaden the timing window [1].
© 1992 Optical Society of America
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