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  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E75-C   No.1   pp.65-69
Publication Date: 1992/01/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Joint Special Section on Fundamentals of Next Generation Opto-Technologies)
Category: 
Keyword: 
light modulator,  oxide superconductor,  superconducting electrode,  

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Summary: 
The characteristics of a LiNbO3 light modulafor 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.