摘要
提出一种基于双偏振正交相移键控(DP-QPSK)调制器的可变对称三角脉冲信号生成方案。通过调节DP-QPSK调制器两个子调制器的调制系数和三个电移相器的相移,可生成对称系数可调谐的三角脉冲信号,对称系数可调谐的范围为0%~100%,生成的三角脉冲信号的重复率等于输入驱动信号频率的两倍,即用较低频率的驱动信号即可生成高重复率的可变对称三角脉冲信号。通过仿真验证了提出方案的可行性,利用均方根误差(RMSE)评估了该方案生成脉冲波形与理想波形的相似度。除三角脉冲信号外,同时验证了该方案还可生成方形脉冲信号。
A triangular pulse signal generation scheme with variable symmetry based on a dual-polarization quadrature phase-shift keying(DP-QPSK)modulator is proposed.The triangular pulse signal with a tunable symmetry coefficient can be generated by adjusting the modulation index of two sub modulators of the DP-QPSK modulator and the phase shift of three electrical phase shifters.The tunable range of the symmetry coefficient is 0%‒100%,and the repetition rate of the generated triangular pulse signal is twice the frequency of the input driving signal,which shows that a triangular pulse signal with variable symmetry and high repetition rate can be generated using a driving signal with lower frequency.The feasibility of the proposed scheme is verified through a simulation,and the similarity between the pulse waveform generated by the scheme and the ideal waveform is evaluated using the root mean square error(RMSE).The study verifies that,in addition to the triangular pulse signal,the scheme can also generate a square pulse signal.
作者
王创业
宁提纲
李晶
裴丽
郑晶晶
王建帅
Wang Chuangye;Ning Tigang;Li Jing;Pei Li;Zheng Jingjing;Wang Jianshuai(Key Laboratory of All Optical Network and Advanced Telecommunication Network of Ministry of Education,Beijing Jiaotong University,Beijing 100044,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2023年第15期137-143,共7页
Laser & Optoelectronics Progress
基金
国家自然科学基金(62005012,61827817)。
关键词
光通信
三角脉冲信号
可变对称
傅里叶级数
电移相器
optical communications
triangular pulse signal
variable symmetry
Fourier series
electrical phase shifter
