P. Elango et al., LOW-POWER ALL-OPTICAL BROAD-BAND SWITCHING DEVICE USING YTTERBIUM-DOPED FIBER, IEEE photonics technology letters, 8(8), 1996, pp. 1032-1034
All-optical photonic switching has been demonstrated at 1310 nm and 15
45 nm using an all-fiber Mach-Zehnder interferometer incorporating ytt
erbium-doped silica fiber. The switching was achieved with 980 nm exci
tation from a laser diode, with a power-length product of 3.7 mW . m a
nd 5.8 mW . m at 1310 nm and 1545 nm respectively, thus giving low pow
er all-optical switching at the preferred telecommunications wavelengt
hs.