Title :
A Coplanar Strip Slow Wave Structure for the Optical Directional Coupler Modulators
Author :
Oh, Jaesang ; Gopinath, Anand
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Minnesota, Minneapolis, MN, USA
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 ?? . 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.
Keywords :
III-V semiconductors; coplanar waveguide components; gallium arsenide; optical directional couplers; optical modulation; optical waveguides; slow wave structures; strip line components; GaAs; RF wave modulation signal phase velocity; characteristic impedance; coplanar stripline slow wave structure; effective refractive index; microwave modulation signal phase velocity; optical directional coupler modulators; optical wave velocity; optical waveguides; resistance 50 ohm; series inductances; shunt capacitances; Directional coupler modulator; impedance matching; slow wave transmission line; velocity;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2009.2035946
