@inproceedings{da7f3c109df445bb93d0cbe8ccfc53a9,
title = "Realizing Parity-Time Symmetry in a Single-Physical-Loop Optoelectronic Oscillator",
abstract = "An Optoelectronic Oscillator (OEO) for single frequency oscillation enabled by broken parity time (PT) symmetry is presented. The PT symmetry is realized based on two equivalent loops with the gain loop formed by the beating of the optical carrier with the ±1st order sidebands and the loss loop formed by the beating of the ±1st order sidebands with the ±2nd order sidebands at a photodetector in a single-physical-loop OEO. Once the gain and loss coefficients in the system are made identical in magnitude and are greater than the coupling coefficient, PT symmetry is broken and a single frequency oscillation is achieved. Experimental results show that a microwave signal at 9.997 GHz with a high sidemode suppression ratio of 45 dB and an ultra-low phase noise of-142 dBc/Hz at a 10kHz offset frequency is generated. ",
keywords = "higher order sidebands, optoelectronic oscillator, parity-time-symmetric, single physical loop",
author = "Yu Qiao and Yu Zhang and Chan, {Erwin H.W.} and Xudong Wang and Guan, {Bai Ou} and Xinhuan Feng and Jianping Yao",
year = "2022",
doi = "10.1109/ICAIT56197.2022.9862705",
language = "English",
series = "2022 IEEE 14th International Conference on Advanced Infocomm Technology, ICAIT 2022",
publisher = "IEEE, Institute of Electrical and Electronics Engineers",
pages = "256--259",
booktitle = "2022 IEEE 14th International Conference on Advanced Infocomm Technology, ICAIT 2022",
address = "United States",
edition = "1",
note = "14th IEEE International Conference on Advanced Infocomm Technology, ICAIT 2022 ; Conference date: 08-07-2022 Through 11-07-2022",
}