Title :
Optical-microwave intermixing of a CPW-to-slotline ring resonator on GaAs substrate
Author :
Lee, Jong-Chul ; Taylor, Henry F. ; Chang, Kai
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
We report the optical-microwave intermixing using an uniplanar CPW-to-slotline ring resonator fabricated on a semi-insulating GaAs substrate for the first time. In this structure, a conductive Schottky photodetector is monolithically integrated as a coupling gap between the coplanar waveguide (CPW) feed lines and the slotline ring resonator. Difference frequency mixing spectrum between an optically modulated RF input and a microwave LO has been demonstrated using optical excitation. The intermediate frequency (IF) response has been investigated as functions of the RF power, the LO pumping power, and the applied bias voltage. Conversion loss (in dB) has been measured as a function of LO frequency and compared to other data.
Keywords :
III-V semiconductors; Schottky diode mixers; coplanar waveguides; electro-optical modulation; gallium arsenide; integrated optoelectronics; optical communication equipment; optical losses; optical planar waveguides; optical pumping; optical resonators; optical waveguide components; photodetectors; substrates; CPW-to-slotline ring resonator; GaAs; GaAs substrate; LO pumping power; RF power; applied bias voltage; conductive Schottky photodetector; conversion loss; coplanar waveguide feed lines; coupling gap; difference frequency mixing; intermediate frequency response; microwave LO; monolithically integrated; optical excitation; optical-microwave intermixing; optically modulated RF input; semi-insulating GaAs substrate; slotline ring resonator; uniplanar CPW-to-slotline ring resonator; Coplanar waveguides; Gallium arsenide; Nonlinear optics; Optical mixing; Optical modulation; Optical pumping; Optical ring resonators; Optical waveguides; Photodetectors; Radio frequency;
Journal_Title :
Photonics Technology Letters, IEEE
