A coplanar strip slow wave structure for the optical directional coupler modulators

Jaesang Oh, Anand Gopinath

Research output: Contribution to journalArticlepeer-review

Abstract

A design of a coplanar stripline (CPS) slow wave structure, which has for the first time both series inductive and shunt capacitive sections, has been developed. It has been designed to match the RF/microwave modulation signal phase velocity to the optical wave velocity in GaAs optical waveguides. In this design, the CPS with series inductances and shunt capacitances retains the characteristic impedance at 50 Ω. This slow wave structure provides flexibility of design for narrow gap CPS structures. The effective refractive index and characteristic impedance of this design have been measured in the frequency range of up to 45 GHz and compared to simulations.

Original languageEnglish (US)
Article number5350395
Pages (from-to)7-9
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume20
Issue number1
DOIs
StatePublished - Jan 1 2010

Keywords

  • Directional coupler modulator
  • Impedance matching
  • Slow wave transmission line
  • Velocity

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