LiNbO3 Optical Modulator Using a Superconducting Resonant Electrode

Keiji YOSHIDA  Akihiko NOMURA  Yutaka KANDA  

IEICE TRANSACTIONS on Electronics   Vol.E77-C   No.8   pp.1181-1184
Publication Date: 1994/08/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Superconducting Devices)
Category: LTS
LiNbO3 optical modulator,  superconducting electrode,  resonant type optical modulator,  

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Microwave characteristics of a LiNbO3 optical modulator using a superconductor (Pb-In-Au) as a resonant electrode has been studied experimentally at low temperatures down to 4.2 K. It is shown that at the resonance frequency of 14.8 GHz the obtained modulation depth takes a maximum value as expected from theory when the electrode becomes superconducting. The present results demonstrate the possible applications of superconducting electrodes to high performance LiNbO3 optical modulators.