Abstract

A multicarrier light source based on a recirculating frequency shift loop (RFSL) driven by a parity–time (PT)-symmetric optoelectronic oscillator (OEO) is proposed and experimentally demonstrated. The impact of the side-mode suppression ratio (SMSR) of the radio frequency (RF) signal on the multicarrier is studied for the first time, to our knowledge. The RFSL driven by PT-symmetric OEO significantly optimizes the phase noise and flatness of the multicarrier, facilitating the system miniaturization. In the experiment, a 10.019 GHz RF signal with a SMSR of 42 dB is generated with ${-}{98.63}\;{\rm dBc/Hz}$ measured phase noise at 10 kHz offset frequency (actual phase noise should be lower than ${-}{122.87}\;{\rm dBc/Hz}$). Up to 120 subcarriers with 2.32 dB flatness are obtained successfully, covering the overall bandwidth of approximately 1.2 THz.

© 2023 Optica Publishing Group

Highly improved side mode suppression ratio and a low phase noise optoelectronic oscillator

Yalan Wang, Chengji Lin, Xiang Li, Jin Zhang, Anle Wang, Depei Zhang, Shirui Du, and Xiaoniu Peng
Appl. Opt. 61(15) 4602-4609 (2022)

Single-loop tunable PT-symmetric optoelectronic oscillator based on a phase modulator

Jiahong Zhang, Yao Wang, and Qihong Ding
Appl. Opt. 63(3) 566-574 (2024)

Parity-time symmetric frequency-tunable optoelectronic oscillator based on a Si₃N₄ microdisk resonator

Pengcheng Liu, Pengfei Zheng, Huimin Yang, Dongdong Lin, Guohua Hu, Binfeng Yun, and Yiping Cui
Appl. Opt. 60(7) 1930-1936 (2021)

Microwave signal generation from a parity-time-symmetric optoelectronic oscillator with optical injection locking

Zhejing Jiao, Pengcheng Zuo, Liang Xue, Gaofang Li, and Yang Chen
Appl. Opt. 61(33) 9868-9872 (2022)

Parity-time symmetric tunable OEO based on dual-wavelength and cascaded PS-FBGs in a single-loop

Pengcheng Liu, Zhanwu Xie, Dongdong Lin, Mengjia Lu, Wei Cheng, Guohua Hu, Binfeng Yun, and Yiping Cui
Opt. Express 29(22) 35377-35386 (2021)