基于双环结构的谐波锁模光电振荡器仿真模型

doi:10.12263/DZXB.20211022

电子学报 ›› 2022, Vol. 50 ›› Issue (4): 789-795.DOI: 10.12263/DZXB.20211022

所属专题：微波光子技术；长摘要论文

基于双环结构的谐波锁模光电振荡器仿真模型

吴懿霖, 曾珍, 章令杰, 张旨遥(), 刘永

电子科技大学光电科学与工程学院电子薄膜与集成器件国家重点实验室，四川成都 611731

收稿日期:2021-08-01 修回日期:2022-01-27 出版日期:2022-04-25
- 通讯作者:
- 张旨遥
- 作者简介:
- 吴懿霖男，2000年出生，四川德阳人.电子科技大学光电科学与工程学院本科生.主要研究方向为微波光子学.E-mail: wuyilin@std.uestc.edu.cn
  曾珍女，1994年出生，四川广元人.电子科技大学光电科学与工程学院博士研究生.主要研究方向为微波光子滤波器和光电振荡器.E-mail: zengzhen94@std.uestc.edu.cn
  章令杰男，1993年出生，浙江嵊州人.电子科技大学光电科学与工程学院博士研究生.主要研究方向为微波光子学.E-mail: zhanglingjie1993@std.uestc.edu.cn
  张旨遥（通讯作者）男，1983年出生，四川井研人.电子科技大学光电科学与工程学院教授.主要研究方向为光电子技术. E-mail: zhangzhiyao@uestc.edu.cn
  刘永男，1970年出生，四川富顺人.电子科技大学光电科学与工程学院教授，博士生导师.主要研究方向为光电子技术和微波光子技术.E-mail: YongLiu@uestc.edu.cn
- 基金资助:
- 科技部国家重点研发计划 (2019YFB2203800); 国家自然科学基金重大科研仪器研制项目 (61927821); 中央高校基本科研业务费面向重大需求类项目 (ZYGX2020ZB012)

Simulation Model for Harmonically Mode-Locked Optoelectronic Oscillator Based on A Dual-Loop Architecture

WU Yi-lin, ZENG Zhen, ZHANG Ling-jie, ZHANG Zhi-yao(), Liu Yong

State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University ofElectronic Science and Technology of China, Chengdu, Sichuan 611731, China

Received:2021-08-01 Revised:2022-01-27 Online:2022-04-25 Published:2022-04-25
- Corresponding author:
- ZHANG Zhi-yao
- Supported by:
- National Key Research and Development Program of the Ministry of Science and Technology (2019YFB2203800); National Major Scientific Research Instrument Development Project, NSFC (61927821); Fundamental Research Funds for the Central Universities Targeted to Major Project (ZYGX2020ZB012)

摘要/Abstract

摘要：

本文提出了一种基于偏压调制的双环谐波锁模光电振荡器仿真模型.该模型包括了利用电光调制器偏压调制实现的模式锁定、采用微波信号与滤波器冲激响应卷积实现的模式选择，以及基于双环信号相干叠加的超模噪声抑制.采用改进的脉冲跟踪法实现了双环信号的同步演化仿真.基于提出的模型仿真了谐波锁模状态下的输出微波脉冲信号的波形、频谱、超模噪声抑制和相位噪声特性，仿真结果与实验结果相符.该仿真模型可用于设计基于偏压调制的双环谐波锁模光电振荡器，以及研究双环腔内的动力学过程，有助于获得高超模噪声抑制比的微波信号.

长摘要

提出了一种基于偏压调制的双环谐波锁模光电振荡器，基于双环结构中的“游标卡尺”效应可以实现谐波锁模状态下超模噪声的抑制。在该结构中，通过对电光调制器的直流偏置进行周期性的调制，并且当调制频率为光电振荡环路自由光谱范围的N倍时(N≥2且为整数)，谐波锁模机制在环路中建立，可产生高阶锁模微波脉冲信号。由于采用了双环结构，该系统有效地抑制了谐波锁模过程中产生的超模噪声。本文建立了基于偏压调制的双环谐波锁模光电振荡器仿真模型，该模型主要包括了以下三个部分：利用电光调制器偏压调制实现模式之间的相位锁定，采用微波脉冲信号与滤波器冲激响应卷积的方式实现腔内模式选择，以及基于双环振荡信号的相干叠加实现超模噪声抑制。采用改进的脉冲跟踪法对该模型进行了数值求解，模拟了双环锁模光电振荡器中信号的起振过程，实现了双环内信号的同步演化仿真，计算得到了谐波锁模状态下光电振荡器输出微波脉冲信号的时域波形、频谱、超模噪声抑制和相位噪声等特性，仿真结果与实验结果相符，验证了双环结构对超模噪声抑制的可行性。本文所提出的模型可用于设计具有高超模噪声抑制比的谐波锁模光电振荡器，并且可以用于研究双环光电谐振腔内的动力学过程。

关键词: 光电振荡器, 谐波锁模, 双环结构, 超模噪声

Abstract:

A simulation model is proposed for a harmonically mode-locked optoelectronic oscillator(OEO) based on a dual-loop architecture and bias modulation. The model includes bias modulation of the electro-optic modulator for mode locking, convolution of microwave signals and filter impulse response for mode selection, and time-domain interference of signals in two cavities for super-mode noise suppression. Numerical simulation is carried out based on the improved pulse tracking method to realize synchronous pulse evolution in two cavities. Through using this model, the waveform, the electrical spectra, the super-mode noise suppression and the phase noise characteristics of the generated microwave pulse trains under harmonic mode locking are numerically simulated, where the simulation results fit in with the experimental results. The proposed model can be used to design a harmonically mode-locked OEO based on a dual-loop architecture and bias modulation, and study the dynamic process in the dual-loop cavity, which is conducive to achieve microwave signals with super-mode noise suppression ratio.

Extended Abstract

A dual-loop harmonically mode-locked optoelectronic oscillator (OEO) is proposed based on bias modulation. By using this scheme, the supermode noise of the generated microwave pulse signal from the OEO under harmonic mode locking state can be effectively suppressed via the Vernier effect introduced by the dual-loop architecture. In the proposed scheme, harmonic mode locking can be achieved in the OEO cavity when the direct-current (DC) bias port of the electro-optic modulator is driven by a periodical signal with a frequency N (N≥2) times of the free spectral range of the OEO cavity. In such a case, a high-order mode-locked microwave pulse signal can be generated by the OEO. Benefited from the dual-loop architecture, the supermode noise in the harmonic mode locking process can be greatly suppressed. A simulation model of the dual-loop harmonically mode-locked OEO based on bias modulation is established. The kernel of the simulation model includes the following three parts. Firstly, the phase locking between different longitudinal modes in the OEO cavity is realized by the bias modulation of the electro-optic modulator. Secondly, the mode selection in the OEO cavity is calculated through the convolution of the microwave pulse signal and the filter impulse response. Thirdly, the supermode noise suppression is achieved by the time-domain coherent superposition of the signals in the two loops. An improved pulse tracking method is used to simulate the start-up process of the microwave signal in the dual-loop harmonically mode-locked OEO, where synchronous pulse evolution in the two loops is realized. Through numerically solving this proposed model, the waveforms, the spectra, the supermode noise suppression and the phase noise characteristics of the generated microwave pulse trains from the dual-loop OEO under harmonic mode locking are simulated. The simulation results fit in with the experimental results. Hence, the feasibility of using the dual-loop architecture to achieve supermode noise suppression in the harmonically mode-locked OEO is verified. The proposed model can be employed to design a dual-loop harmonically mode-locked OEO with a high supermode noise suppression ratio. In addition, it can also be used to study the dynamic process in a dual-loop optoelectronic resonator.

Key words: optoelectronic oscillator, harmonic mode locking, dual-loop architecture, super-mode noise

中图分类号:

TN753.2

吴懿霖, 曾珍, 章令杰, 等. 基于双环结构的谐波锁模光电振荡器仿真模型[J]. 电子学报, 2022, 50(4): 789-795.

Yi-lin WU, Zhen ZENG, Ling-jie ZHANG, et al. Simulation Model for Harmonically Mode-Locked Optoelectronic Oscillator Based on A Dual-Loop Architecture[J]. Acta Electronica Sinica, 2022, 50(4): 789-795.

图/表 10

图1 系统框图

图2 脉冲跟踪一次延时演化的计算流程

表1 环腔内的器件参数设置

物理量	数值	物理量	数值
$V π D C$	4.2 V	$γ 1$	0.5
$V π A C$	4.2 V	$γ 2$	0.3
$R$	50 Ω	$η$	0.5
$ρ$	0.8 A/W	$σ a t t$	0.806

表1 环腔内的器件参数设置

物理量	数值	物理量	数值
$V π D C$	4.2 V	$γ 1$	0.5
$V π A C$	4.2 V	$γ 2$	0.3
$R$	50 Ω	$η$	0.5
$ρ$	0.8 A/W	$σ a t t$	0.806

图3 输出微波脉冲串时域波形及其细节

图4 2阶谐波锁模输出频谱

图5 单环与双环二阶谐波锁模结构的脉冲串自相关结果

图6 8阶谐波锁模输出频谱

图7 双环2阶谐波锁模结构与单环基频锁模结构的单边带功率谱

图8 实验测量的双环2阶谐波锁模结构输出频谱(a) 频谱 (b) 细节

图9 输出微波脉冲串

参考文献 9

1	YAOX S, MalekiL. Optoelectronic microwave oscillator[J]. Journal of the Optical Society of America B, 1996, 13(8): 1725-1735.
2	HAOT F, TANGJ, DOMENECHD, et al. Toward monolithic integration of OEOs: From systems to chips[J]. Journal of Lightwave Technology, 2018, 36(19): 4565-4582.
3	ZENGZ, ZHANGL J, ZHANGY W, et al. Microwave pulse generation via employing an electric signal modulator to achieve time-domain mode locking in an optoelectronic oscillator[J]. Optics Letters, 2021, 46(9): 2107-2110.
4	JIANGY, YUJ L, WANGY T, et al. An optical domain combined dual-loop optoelectronic oscillator[J]. IEEE Photonics Technology Letters, 2007, 19(11): 807-809.
5	SHUMAKHERE, EISENSTEING. A novel multiloop optoelectronic oscillator[J]. IEEE Photonics Technology Letters, 2008, 20(22): 1881-1883.
6	GARCÍAS, GASULLAI. Multi-cavity optoelectronic oscillators using multicore fibers[J]. Optics Express, 2015, 23(3): 2403-2415.
7	WUY L, ZENGZ, ZHANGL J, et al. Modeling an actively mode-locked optoelectronic oscillator based on electric amplitude modulation[J]. Optics Express, 2021, 29(15): 23835-23846.
8	LEVYE C, OKUSAGAO, HOROWITZM, et al. Comprehensive computational model of single- and dual-loop optoelectronic oscillators with experimental verification[J]. Optics Express, 2010, 18(20): 21461-21476.
9	ELIYAHUD, MALEKIL. Low phase noise and spurious level in multi-loop opto-electronic oscillators[C]//Proceedings of the 2003 IEEE International Frequency Control Symposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum. New York: IEEE, 2003: 405-410.

基于双环结构的谐波锁模光电振荡器仿真模型

Simulation Model for Harmonically Mode-Locked Optoelectronic Oscillator Based on A Dual-Loop Architecture

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