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Nonreciprocal Amplification in Coupled‐Rotating Cavities Around Exceptional Points
Author(s) -
Peng Rui,
Zhao Chengsong,
Yang Zhen,
Xiong Biao,
Zhou Ling
Publication year - 2021
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.202000405
Subject(s) - physics , sagnac effect , transmission (telecommunications) , amplifier , coupling (piping) , rotation (mathematics) , parametric statistics , optical parametric amplifier , eigenvalues and eigenvectors , optics , signal (programming language) , optical rotation , optical amplifier , topology (electrical circuits) , optoelectronics , quantum mechanics , optical fiber , telecommunications , computer science , laser , materials science , statistics , mathematics , cmos , artificial intelligence , metallurgy , programming language , combinatorics
A nonreciprocal‐amplified scheme for signal transmission is proposed in a coupled rotation‐cavity system, where the two cavities rotate with opposite directions, and an optical parametric amplifier (OPA) is attached to one cavity. The coupling between cavities can effectively compensate and enhance the frequency shift of the Sagnac effect, and a perfect nonreciprocity can be achieved. Owing to the introduction of an OPA medium, eigenvalues of the dynamic matrix exhibit exceptional points (EPs), and the amplified‐nonreciprocal transmission can be obtained around EPs.