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A Study on LiNbO3 Light Modulator Using the Resonant YBa2Cu3Oy Superconducting Electrode
Kiichi YOSHIARA Fusaoki UCHIKAWA Takashi MIZUOCHI Tadayoshi KITAYAMA Katsuhiro IMADA Iwao KAWAMATA Shigeru MATSUNO Shin UTSUNOMIYA
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/01/25
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Joint Special Section on Fundamentals of Next Generation Opto-Technologies)
light modulator, oxide superconductor, superconducting electrode,
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The characteristics of a LiNbO3 light modulator using the resonant YBa2Cu3Oy superconducting electrode were studied on the basis of the calculated results of surface resistances and transmission losses. The two-fluid model and the conventional transmission theory were used for the calculations. It was found that the modulation depth of this modulator using the YBCO electrode at 77 K was 7.5 times that using the Al electrode at room temperature. The drive voltage for the phase modulation of π radians was estimated to be a very low value of 2.3 V.