Title :
Integration of Optical Waveguides With Single Flux Quantum Circuits
Author :
Arita, Yoshiki ; Yoshikawa, Nobuyuki ; Toshihiko, Baba
Author_Institution :
Dept. of Electr. & Comput. Eng., Yokohama Nat. Univ., Yokohama, Japan
fDate :
6/1/2011 12:00:00 AM
Abstract :
Single flux quantum (SFQ) circuits and optical circuits are expected to be used in next-generation integrated circuits. This study investigates basic technologies for integrating optical circuits with SFQ circuits to exploit the advantages of both technologies. We calculated, designed and evaluated metal-clad waveguides, which can be fabricated by the ISTEC standard process (STD2). Light propagates along an 830-μm-long waveguide with a propagation loss of 16 dB/mm. We also designed and evaluated an optical-electrical (O-E) converter that uses a Josephson junction, which can be fabricated by the same process used to fabricate the SFQ circuits. When an optical signal with a peak power of 1.15 mW at 1.548 μm is input, the Josephson O-E converter generates SFQ pulses.
Keywords :
Josephson effect; integrated optoelectronics; optical waveguides; superconducting integrated circuits; ISTEC standard process; Josephson junction; O-E converter; SFQ circuit; SFQ pulse; metal-clad waveguide; next-generation integrated circuit; optical circuit; optical waveguide; optical-electrical converter; single flux quantum circuit; size 1.548 mum; size 830 mum; Converters; Optical crosstalk; Optical device fabrication; Optical imaging; Optical pulses; Optical waveguides; Propagation losses; Optical detectors; SFQ circuits; optical waveguide components; superconducting integrated circuits;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2010.2095813