Accession Number:

ADA285808

Title:

High Power Josephson Effect Sources

Descriptive Note:

Final rept. May 1990-Mar 1994

Corporate Author:

STATE UNIV OF NEW YORK AT BUFFALO DEPT OF PHYSICS

Personal Author(s):

Report Date:

1994-09-01

Pagination or Media Count:

49.0

Abstract:

Progress is reported toward the development of high power linear array Josephson effect sources for the submillimeter wave. A series biased array, fabricated at IBM, was successfully tested and demonstrated fully coherent operation with a power of over 1 microns W into 50 omega near 300 GHz. A single chip source detector was designed, fabricated at Stony Brook and tested. On-chip source-mixing between two small array sources operating near 300 GHz was accomplished with the IF, near 10 GHz, being coupled out of the cryostat for direct linewidth measurement. The measured linewidth agreed with theory. This chip also demonstrated a new array design in which groups of multiple, closely spaced junctions were placed at wavelength intervals. This permitted much higher density and consequently higher power per unit area from the arrays. This new design was incorporated into a 500 junction source, also fabricated at IBM, which delivered nearly 5O microns W to a load of over 50 omega near 400 GHz. The PARTS process used by IBM for this fabrication has now been set up at Stony Brook permitting on-site fabrication o even higher power sources. Superconductor, Submillimeter wave source, Josephson effect source, Coherent arrays

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE