Title :
Design and performance of superconducting circuits for LiNbO3 optical modulator and switch
Author :
Yoshida, K. ; Kanda, Y. ; Yoshihara, H. ; Kanaya, H. ; Shinkai, S. ; Ishitobi, M.
Author_Institution :
Dept. of Electron., Kyushu Univ., Fukuoka, Japan
fDate :
6/1/2003 12:00:00 AM
Abstract :
The design and performance of a LiNbO3 optical modulator and switch, which employ superconducting circuits, have been studied. Based on a novel design method of the booster circuit using superconducting coplanar waveguide transmission lines, we designed a voltage amplifier with center frequency of 10 GHz, bandwidth of 5 MHz, and the voltage gain of 33 dB using an electromagnetic wave simulator. We also designed a high speed optical switch combining optical directional coupler and Mach-Zehnder interferometer. A preliminary experiment with YBCO electrode on MgO substrate flip-chip-bonded on LiNbO3 optical waveguide has been made.
Keywords :
Mach-Zehnder interferometers; barium compounds; coplanar waveguides; high-temperature superconductors; lithium compounds; optical directional couplers; optical modulation; optical switches; superconducting transmission lines; yttrium compounds; 10 GHz; 33 dB; 5 MHz; LiNbO3; Mach-Zehnder interferometer; YBCO electrode; YBaCuO; booster circuit; electromagnetic wave simulator; high-Tc transmission lines; optical directional coupler; optical modulator; optical switch; superconducting circuits; superconducting coplanar waveguide transmission lines; voltage amplifier; voltage gain; Circuits; Electromagnetic waveguides; High speed optical techniques; Optical design; Optical interferometry; Optical modulation; Optical switches; Optical waveguides; Stimulated emission; Superconducting transmission lines;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.814142
