摘要
针对复杂波形生成的需求,提出了一种基于偏振复用调制的周期性光学任意波形信号生成方案。通过精心调控正交相移键控(QPSK)调制器的调制指数、射频偏移及偏置相移等关键参数,使得2个正交偏振态上的调制器能够分别输出傅里叶级数中的正弦和余弦谐波叠加形式的光强。当这些光强合束后,就能得到幅度和相位均可精确控制的函数波形,而且还具备可调谐函数波形信号输出的特性。仿真结果表明:当均方根误差小于等于0.05时,该方案可生成对称因子可调(20%~80%)斜坡波、占空比可调(30%~100%)三角波和半占空比可调(20%~80%)斜坡波3种典型波形,验证了该方案的可行性。
Aiming at the need for generating complex waveforms,a periodic optical arbitrary waveform signal generation scheme based on polarization multiplexing modulation is proposed.By carefully adjusting the modulation index,radio frequency offset,and bias phase shift of the quadrature phase shift keying(QPSK)modulator,the modulators on the two orthogonal polarization states can output optical intensities in the form of sine and cosine harmonic superpositions in the Fourier series,respectively.When these optical intensities are combined,a functional waveform with precisely controllable amplitude and phase can be ob-tained,and it also has the characteristic of tunable functional waveform signal output.The simulation results show that when the root mean square error is less than or equal to 0.05,this scheme can generate three typical waveforms:a symmetric factor ad-justable(20%~80%)ramp wave,a duty cycle adjustable(30%~100%)triangle wave,and a half-duty cycle adjustable(20%~80%)ramp wave.This verifies the feasibility of the proposed solution.
作者
王雪辉
李晶
燕苗霞
裴丽
宁提纲
郑晶晶
王建帅
WANG Xuehui;LI Jing;YAN Miaoxia;PEI Li;NING Tigang;ZHENG Jingjing;WANG Jianshuai(Institute of Lightwave Technology,Beijing Jiaotong University,Beijing 100044,China)
出处
《光通信技术》
北大核心
2024年第3期95-101,共7页
Optical Communication Technology
基金
国家自然科学基金项目(62235003)资助
中央高校基本科研业务费项目(2022JBMC004)资助。
关键词
偏振复用调制
对称因子可调
占空比可调
半占空比可调
函数波形
傅里叶级数
polarization multiplexing modulation
symmetric factor adjustable
duty cycle adjustable
half duty cycle adjustable
function waveform
Fourier series
