• DocumentCode
    1219603
  • Title

    Low-voltage, 50 Omega , GaAs/AlGaAs travelling-wave modulator with bandwidth exceeding 25 GHz

  • Author

    Walker, R.G. ; Bennion, 1. ; Carter, A.C.

  • Author_Institution
    Plessey Res. Caswell Ltd., Towcester, UK
  • Volume
    25
  • Issue
    23
  • fYear
    1989
  • Firstpage
    1549
  • Lastpage
    1550
  • Abstract
    Travelling-wave, Mach-Zehnder electro-optic modulators to a new design in GaAs/AlGaAs are described. Velocity matching, with 50 Omega impedance and high electro-optic efficiency, is achieved using a capacitively loaded stripline approach. Devices with VGp=4.85 V ( lambda =1152 nm) have 3 dB band widths of 25.5 GHz, while those with shorter electrodes (Vpi =5.7 V) show no roll-off below 26.5 GHz. The bandwidth/voltage ratio for these devices represents the highest yet reported for any class of electro-optic modulator.
  • Keywords
    III-V semiconductors; aluminium compounds; electro-optical devices; gallium arsenide; optical modulation; 1152 nm; 25.5 to 26.5 GHz; 50 ohm; GaAs-AlGaAs; Mach-Zehnder electro-optic modulators; bandwidth; bandwidth/voltage ratio; capacitively loaded stripline approach; electro-optic efficiency; travelling-wave modulator;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el:19891041
  • Filename
    138785
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1219603