COHERENT ARRAYS OF THIN-FILM JOSEPHSON MICROBRIDGES.

An investigation is reported of two methods of coupling between the Josephson oscillations in arrays of superconducting microbridges made of Sn and In in order to establish a single free-running coherent state. Experiments were performed involving broadband inductive coupling between pairs of microbridges, each pair constituting a dc-SQUID, and a narrow band coupling between microbridges via resonant structures in transmission lines consisting of microstrip or slot lines. The properties of these two ways of long range coupling of Josephson weak links are discussed, along with their potential for high-frequency applications.