Abstract
The results of an experimental verification of the concept of the previously proposed all-optical wavelength-selective multichannel switch based on an off-axis Fresnel zone plate in the millimeter wavelength range without the use of micromechanical devices or non-linear materials are presented. A laboratory prototype of such a device is considered and its main parameters are discussed. It is shown that the optical isolation of switched channels for a switch based on an off-axis zone plate can reach 15 dB at a frequency difference of 25 GHz in the frequency range of 93–136 GHz.
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