All-optical 2x2 switching with two independent Yb3+-doped nonlinear optical fibers with a long-period fiber grating pair

摘要

We have demonstrated a new type of all-optical 2 X 2 switch by using two independent Yb3+-doped nonlinear optical fibers with a long-period fiber grating pair and a 3-dB fiber coupler. A 400-Hz square-wave pulse train at similar to 1549.4 nm was fully switched between the two output ports up to 200 Hz by modulated pump signals at 976 nm with a maximum pump power of similar to 35 mW, where the extinction ratio at similar to 1549.4 nm between the on and the off states was similar to 17.5 dB. (c) 2005 Optical Society of America.