The design and construction of a lithium niobate 8 × 8 optical switch with a rearrangeably nonblocking architecture is described. The design is compared with the more familiar strictly nonblocking architecture. The switch has 28 elements, a switching voltage of 26 V and a loss of 5.5dB at 1.3μm wavelength.
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Duthie et al. (1988) studied this question.
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