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Transient Effects in Optically Modulated Transmission Line Switches Host Publication: International Topical Meeting on Microwave Photonics Authors: G. Poesen, J. Stiens, J. Raskin, M. Vanden Bossche and R. Vounckx Publication Date: Oct. 2006 ISBN: 978-1-4244-0203-8
Abstract: Transient effects of optically modulated RF-switches, measured with a large-signal vector network analyzer (LSNA) are discussed in this paper. Light is used to influence the characteristics of a coplanar waveguide (CPW) designed in a multilayer thin-film multichip module (MCM-D) technology on high resistivity Silicon (HR-Si). Under static illumination of the CPW line, measurements demonstrate an insertion loss contrast of more than 35 dB above 20 GHz. With a modulated illumination input in the kHz-range, the study of the insertion and return loss show transient effects depending on the carrier frequency and substrate parameters. Time dependent S-parameters are used to study the switch behavior of the CPW line under illumination.
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