We present several new optical cross-connect structures capable of wavelength conversion. The new structures use fewer wavelength converters than previous structures. We describe an effective approach to best use wavelength converters when the input/output fibers of an optical cross-connect do not carry an identical number of wavelength division multiplexed (WDM) data channels. It is shown that the hardware complexity of the new structures can he further reduced if a small but acceptable blocking probability is allowed.
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Zhong et al. (1997) studied this question.
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