Quasi-optical Josephson-junction oscillator arrays

J.A. Stern, H.G. LeDuc, J. Zmuidzinas
1993 IEEE transactions on applied superconductivity  
Josephson junctions are natural voltage-controlled oscillators capable of generating submillimeter-wavelength radiation, but a single junction usually can produce only 100 nW of power and often has a broad spectral linewidth. We are investigating twodimensional quasi-optical power combining arrays of 103 and lo4 NbN/MgO/NbN and Nb/Al-AIOJNb junction to overcome these limitations. The junctions are DC biased in parallel and are distributed along interdigitated lines. The arrays couple to a
more » ... nt mode of a Fabry-Perot cavity to achieve mutual phase-locking. Devices have been produced, and the I-V characteristics of these arrays have been measured, but not as of now in the Fabry-Perot cavity. In this paper, the important features of the design and the critical device properties are discussed.
doi:10.1109/77.233960 fatcat:zq75w3rgmfflfmrqxeitejraai