Abstract

We have proposed an application of disturbance observer with PID controller to minimize gain-transient time of wavelength-division-multiplexing(WDM) multi channels in optical amplifier in channel add/drop networks. We have dramatically reduced the gain-transient time to less than <TEX>$3{\mu}sec$</TEX> by applying a disturbance observer with a proportional/integral/ differential(PID) controller to the control of amplifier gain. The theoretical analysis on the 3-level erbium-doped fiber laser and the disturbance observer technique is demonstrated by performing the simulation with co-simulation of the <TEX>$MATLAB^{TM}$</TEX> and a numerical modeling software package such as the <TEX>$Optsim^{TM}$</TEX>.

© 2007 Optical Society of Korea

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