Abstract
All optical cross-connect switch is very important in optical communication network. In this paper the author proposes a method of developing ‘4×4’ four wavelength cross-connect switch exploiting the nonlinear polarization rotation (NPR) property of the probe beam in semiconductor optical amplifier (SOA). Here all the operations of the cross-connect switches are controlled using control beams of proper frequencies. This scheme may be very simply extended as the multi-channel cross-connect switches. The switch has very high operating speed with good on-off contrast ratio and it will be very effective for wavelength division multiplexing (WDM) based telecommunication network.
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