Topic
Isolator
About: Isolator is a research topic. Over the lifetime, 8672 publications have been published within this topic receiving 65286 citations.
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TL;DR: In this paper, a comprehensive assessment of recent developments of nonlinear isolators in the absence of active control means is presented, which highlights resolved and unresolved problems and recommendations for future research directions.
885 citations
TL;DR: In this article, the essential characteristics of an on-chip optical isolator are reviewed and a discussion of the non-reciprocity requirement is presented, where the authors focus on non-interference.
Abstract: The quest for on-chip optical isolators has recently spawned many new isolator structures. However, there has been some confusion about the requirement of nonreciprocity. Here, we review the essential characteristics of an isolator.
699 citations
Patent•
12 Jun 2000
TL;DR: In this paper, the problem of reducing or stopping radio frequency power to be added on a generator output from a power source in accordance with the prescribed condition of the signal of a monitor which indicates the change of reflection power caused by means of a tissue state under a medical treatment is addressed.
Abstract: PROBLEM TO BE SOLVED: To attain safe usage by reducing or stopping radio frequency power to be added on a generator output from a power source in accordance with the prescribed condition of the signal of a monitor which indicates the change of reflection power caused by means of the change of a tissue state under a medical treatment. SOLUTION: The generator 10 is provided with a radio frequency source having a frequency generating source 12 and a power amplifier 14 and an oscillation frequency in the generation source 12 is controlled by a control system 16. Power for electric surgery is supplied to an electrode assembly 24 having a medical electrode by a UHF band with an impedance isolator 18 such as a circulator in accordance with the output of the amplifier 14, an opposite direction power output 23A is derived from a directional coupler 23 and the output 23A is inputted to a detection and signal adjusting stage 29. Then the point of time when change occurs in tissue is decided so that the power output of the generator is reduced or stopped by the control system 16 by the decision result.
462 citations
TL;DR: A reconfigurable all-optical isolator based on the optical excitation of a gigahertz guided acoustic mode in a micrometre-sized photonic crystal fiber core was demonstrated in this paper.
Abstract: Scientists experimentally demonstrate a reconfigurable all-optical isolator based on the optical excitation of a gigahertz guided acoustic mode in a micrometre-sized photonic crystal fibre core. The work is expected to benefit advanced optical communications and all-optical signal-processing systems.
360 citations
TL;DR: In this paper, a vibration isolator consisting of a vertical linear spring and two nonlinear pre-stressed oblique springs is considered, and the softening parameter leading to quasi-zero dynamic stiffness at the equilibrium position is obtained as a function of the initial geometry, pre-stress and the stiffness of the springs.
355 citations