We have demonstrated a new type of all-optical 2×2 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 ∼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 ∼35 mW, where the extinction ratio at ∼1549.4 nm between the on and the off states was ∼17.5 dB.
© 2005 Optical Society of America
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(160.5690) Materials : Rare-earth-doped materials
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(230.1150) Optical devices : All-optical devices
Yune Hyoun Kim, Un-Chul Paek, and Won-Taek Han, "All-optical 2 × 2 switching with two independent Yb3+-doped nonlinear optical fibers with a long-period fiber grating pair," Appl. Opt. 44, 3051-3057 (2005)