Abstract
AbstractThe TO switch, in which the temperature dependence of the refractive index is used, is considered to have a potential for replacing a purely mechanical version as a switching device for optical channel selection. This paper studies theoretically and experimentally TO switches for improving their performance. First, for a simple model of a TO switch, the switching speed and deflection angle are obtained theoretically. Fundamental experiments have been performed for these characteristics so that the validity of the theory is confirmed. It is found that the switching speed and deflection angle depend not only on the fundamental material constants, but also on the shape of the heating parallel electrodes has been proposed in which the optical beam is extracted by reflection inside the switch substrate. A switch based on this principle has been fabricated. With switching speed less than 0.4 ms and a driving power of 1 W, the deflection angle is more than 1.7 deg. The results confirm the effectiveness of the proposed structure.
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