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

Jaesang Oh; Anand Gopinath

doi:10.1109/LMWC.2009.2035946

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

Jaesang Oh, Anand Gopinath

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-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 language	English (US)
Article number	5350395
Pages (from-to)	7-9
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	20
Issue number	1
DOIs	https://doi.org/10.1109/LMWC.2009.2035946
State	Published - Jan 2010

Bibliographical note

Funding Information:
Manuscript received July 24, 2009; revised September 04, 2009. First published December 08, 2009; current version published January 08, 2010. This work was supported in part by a subcontract from SPAWAR and in part by a Grant from KG Technology Associates, Inc.

Keywords

Directional coupler modulator
Impedance matching
Slow wave transmission line
Velocity

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10.1109/LMWC.2009.2035946

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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.",

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KW - Velocity

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

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