Switching characteristics of directional couplers with a longitudinal electrode gap

Author

Weierholt, Audun J. ; Neegård, Steinar

Author_Institution

SINTEF DELAB, Norwegian Inst. of Technol., Trondheim, Norway

Volume

28

Issue

4

fYear

1992

fDate

4/1/1992 12:00:00 AM

Firstpage

856

Lastpage

863

Abstract

The effect of passive phase shift regions on the performance characteristics of parallel waveguide couplers is considered. In particular, a longitudinal electrode gap in addition to phase shifts in the adiabatic input and output taper regions is considered. Both types of phase shifts have a degrading impact on the accessibility of some switching states. However, an electrode gap combined with taper region phase shifts may be beneficial for certain traveling wave electrode configurations. For a certain combination of gap and electrode lengths a through state with better than 30 dB crosstalk over an extended voltage range has been identified

Keywords

directional couplers; optical couplers; optical switches; accessibility; adiabatic input; degrading impact; directional couplers; electrode lengths; extended voltage range; longitudinal electrode gap; output taper regions; parallel waveguide couplers; passive phase shift regions; performance characteristics; switching characteristics; switching states; traveling wave electrode configurations; Degradation; Directional couplers; Electrodes; Performance analysis; Propagation constant; Refractive index; Transmission line matrix methods; Voltage; Waveguide discontinuities; Waveguide theory;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.135203

Filename

135203