Nonlinearity-based circulator

Reconfigurable Josephson Circulator/Directional Amplifier

Circulators and directional amplifiers are crucial nonreciprocal signal routing and processing components involved in microwave read-out chains for a variety of applications. They are particularly important in the field of superconducting quantum information, where the devices also need to have minimal photon losses to preserve the quantum coherence of signals. Conventional commercial implement...

Integrated Optical Circulator based on Radiatively Coupled Magnetooptic Waveguides

In a three-guide coupler with multimode central waveguide more than two modes of the entire structure participate in the coupling between the outer waveguides. Using a three mode approximation we found simple conditions for complete power transfer between the outer waveguides: the device length has to match certain multiples of the conventionally defined coupling length. The specific form of th...

An assessment of the Neff circulator.

THE PROBLEMS of eliminating expired carbon dioxide from anaesthetic circuits have excited the ingenuity of designers for many years. Carbon dioxide absorption systems, initially introduced in the form of "to-and-fro" circuits, produce an apparatus dead-space which tends to increase as the absorption material becomes exhausted. Means of circulating the gases through the absorber in order to redu...

Studies on Circulator-Tree Wave Digital Filters

A wave digital filter is derived from an analog filter, which is realized as classical doubly resistively terminated reactance filters. Perfectly designed wave digital filters express good dynamic signal range, low roundoff noise and excellent stability characteristics with respect to nonlinearity which are produced due to finite wordlength effects. Wave digital filters inherit the sensitivity ...

Restructuring circulator nurse role aids turnover.