A three-port multimode electro-optic switch has been fabricated in a thin c-cut plate of LiNbO3 using opposed stripe-and-plane electrodes to create field-induced channel waveguides. Fringing electric fields provided multimode optical coupling between channels. Using butt coupling to connect the device into a multimode fiber link, voltage-controlled switching of laser and white-light radiation have been demonstrated.
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Soref et al. (1976) studied this question.
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