A novel coaxial form of optical coupler has been constructed in which 95% intensity modulation was achieved, using a liquid crystal mixture as the electro-optic medium. The behavior of this coupler with varying temperature and applied voltage has been elucidated by comparison with the behavior of the same coupler when the liquid crystal was replaced by a silicone oil whose refractive index could be reproducibly and controllably varied.
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Бусурин et al. (1983) studied this question.
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