• DocumentCode
    1371383
  • Title

    Frequency-dependent propagation characteristics of coplanar waveguide electrode on 100GHz Ti:LiNbO3 optical modulator

  • Author

    Noguchi, Keisuke ; Miyazawa, H. ; Mitomi, O.

  • Author_Institution
    NTT Opto-Electron. Labs., Kanagawa
  • Volume
    34
  • Issue
    7
  • fYear
    1998
  • fDate
    4/2/1998 12:00:00 AM
  • Firstpage
    661
  • Lastpage
    663
  • Abstract
    The microwave propagation characteristics of a coplanar waveguide electrode in the frequency range 45 MHz-110 GHz were studied in order to evaluate the factors which limit the performance of a high-speed ridged Ti:LiNbO3 optical modulator. Since the effective microwave index is constant in the higher frequency range, neither structure nor material dispersions of the modulator are observed. In addition to the conductor loss, the dielectric loss also increases above 20 GHz. The dielectric loss is shown to originate not only in the LiNbO3 substrate, but also in the silicon oxide buffer layer
  • Keywords
    coplanar waveguides; dielectric losses; lithium compounds; optical modulation; optical planar waveguides; optical waveguide components; ridge waveguides; titanium; 45 MHz to 110 GHz; LiNbO3:Ti; buffer layer; conductor loss; coplanar waveguide electrode; dielectric loss; effective microwave index; frequency-dependent propagation characteristics; microwave propagation characteristics; ridged optical modulator;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el:19980284
  • Filename
    673785
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1371383