Abstract

Due to the gain competition effect, it is hard to simultaneously maintain oscillation at two frequencies in an optoelectronic oscillator (OEO) loop. In this paper, a study of the gain competition effect in a dual-frequency OEO is theoretically and experimentally demonstrated. The steady-state conditions in the dual-frequency OEO are theoretically analyzed by deriving dynamic equations. A nonlinear time-varying model, as well as its calculation methods, is carried out to design and study the dynamic process of the dual-frequency OEO. Thanks to this model, the waveform, spectrum, and amplitude evaluation of generated signals, as well as the gain variation in the OEO loop, are numerically simulated. Based on the theoretical analysis and numerical simulation results, three schemes that can suppress the gain competition effect are proposed, and the one based on wavelength division multiplexing (WDM) technology is experimentally realized. The experimental results show that the novel independently tunable dual-frequency OEO, to the best of our knowledge, can generate two-tone RF signals in a range from 1.8 to 18.6 and 1.5 to 18.3 GHz, respectively.

© 2024 Optica Publishing Group

Phase-locked dual-frequency microwave signal generation in an optoelectronic oscillator based on frequency mixing mutual injection

Zhenwei Fu, Zhen Zeng, Huan Tian, Weiqiang Lyu, Lingjie Zhang, Yaowen Zhang, Zhiyao Zhang, Shangjian Zhang, Yali Zhang, Heping Li, and Yong Liu
Opt. Express 32(8) 13825-13835 (2024)

Dual-frequency optoelectronic oscillator incorporating a single cavity and multiband microwave photonic filter

Ling Liu, Xian Jin, Tigang Ning, Lawrence R. Chen, and José Capmany
Opt. Express 29(9) 14006-14015 (2021)

High-gain narrowband radio frequency signal amplifier based on a dual-loop optoelectronic oscillator

Xiaoyi Wang, Ruihuan Wu, Bo Li, Ziyang Wang, Yue Liu, Jia Yuan, Jianping Guo, and Hongzhan Liu
Opt. Express 30(9) 13994-14001 (2022)

Polarization multiplexed active mode-locking optoelectronic oscillator for frequency tunable dual-band microwave pulse signals generation

Bo Yang, Jiwen Yu, Hao Chi, Shuna Yang, Yanrong Zhai, and Jun Ou
Opt. Express 30(15) 27132-27139 (2022)

All-optical gain optoelectronic oscillator based on a dual-frequency integrated semiconductor laser: potential to break the bandwidth limitation in the traditional OEO configuration

Jin Li, Tao Pu, Jilin Zheng, Yunshan Zhang, Yuechun Shi, Wei Shao, Xin Zhang, Xianshuai Meng, Jie Liu, Juan Liu, and Xiangfei Chen
Opt. Express 29(2) 1064-1075 (2021)