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Proceedings Paper

Fiber optic input and output for superconducting circuits
Author(s): Lewis A. Bunz; Elie K. Track; Sergey V. Rylov; Fei-Yuh Perng; Jeffrey D. Morse
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Paper Abstract

Superconducting devices operate at speeds where coaxial copper cables can be a limiting factor. Coaxial cables can limit frequency response and impose significant thermal loading on a cyrogenic system. The high bandwidth of optical fibers and their low thermal conductivity make them good candidates for providing data into and out of superconducting circuits. In this paper, we present the results of our experience in operating photodetectors and laser diodes together with superconducting circuits in the same low temperature (4.2 K) environment. Using these photodetectors, we demonstrate the input of optical signals to an analog superconducting circuit at 6 GHz. Output from a superconducting circuit operating at 500 MHz is fed into a laser diode, and optically coupled to room temperature electronics. By combining these two techniques, we demonstrate a fully operational superconducting shift register with both input and output signals supplied by optical fiber.

Paper Details

Date Published: 2 July 1994
PDF: 8 pages
Proc. SPIE 2160, Superconductive Devices and Circuits, (2 July 1994); doi: 10.1117/12.181007
Show Author Affiliations
Lewis A. Bunz, Hypres, Inc. (United States)
Elie K. Track, Hypres, Inc. (United States)
Sergey V. Rylov, Hypres, Inc. (United States)
Fei-Yuh Perng, Hypres, Inc. (United States)
Jeffrey D. Morse, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 2160:
Superconductive Devices and Circuits
Robert A. Buhrman; John T. Clarke; Ken Daly; Roger H. Koch; Jerome A. Luine; Randy W. Simon, Editor(s)

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