Frequency domain integrating resonant superconducting transmissi

Details Frequency domain integrating resonant superconducting transmissi Frequency domain integrating resonant superconducting transmissi

1989-07-31

1990-10-09

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Superconducting type

505849, 505866, H01L 3900

Patent

active

049623168

ABSTRACT:
A Frequency Domain Infrared Superconducting Transmission Line (FIRST) detector is comprised of a folded superconducting transmission line 18 coupled at an input port 18a to a narrow band microwave source and coupled at an output port 18b to a microwave power monitor 22. An optically induced change in the kinetic inductance of the transmission line shifts the transmission line phase velocity and resonant frequency. The shift in resonant frequency attenuates the propagating wave amplitude proportionally to the product of the transmission line Q and the frequency shift. When fabricated with a densely folded superconducting line and operated at a nominal resonant frequency of several GHz the use of either linear or logarithmic Schottky barrier detectors enables a realization of a dynamic range of eight orders of magnitude.

REFERENCES:
patent: 4873482 (1989-10-01), Gray
"Superconducting Kinetic Inductance Bolometer, " by J. E. Sauvageau and D. G. McDonald; presented at Applied Superconductivity Conference, Sep. 1988.

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