摘要
分析控制调制信号波形对光谱特性控制性能的影响,为有效控制相位调制激光脉冲输出光谱特性奠定基础。设计多程相位调制光路图对入射激光脉冲实施相位调制,通过控制多程相位调制过程中调制信号波形的形状、深度与宽度,获取到激光脉冲不同光谱特性输出,对所输出的激光脉冲不同光谱特性展开分析。结果表明,调制信号波形的形状可直接影响到输出光谱特性的不同,当调制次数固定时,通过控制调制信号波形的深度与宽度,均可有效调整输出光谱的展宽效果,调制信号波形最大宽度可达到145,深度可到达3.82,深度与宽度越大则输出光谱的展宽效果越好;当激光脉冲同调制信号间的相对延时固定时,调制信号波形的宽度越大,则输出光谱的展宽变化量越小。控制调制信号波形的形状、深度与宽度均对相位调制激光脉冲输出光谱的特性控制性能有着直接的影响作用。
The influence of the control modulated signal waveform on the control performance of spectral characteristics is analyzed, which lays foundation for effective control of output spectral characteristics of phase-modulated laser pulse. By controlling shape, depth and width of the modulated signal waveform in the process of multi-path phase modulation, the output of different spectral characteristics of laser pulse is obtained, and the different spectral characteristics of the output laser pulse are analyzed. Results show that the shape of the modulation signal waveform can directly affect the differences of output spectral characteristics. When modulation frequency is fixed, by controlling the depth and width of the modulation signal waveform, the output spectral broadening effect can be effectively adjusted, the maximum width modulation signal waveform can be reached 145, and the depth can reach 3.82. The greater the depth and width of output spectrum, the better broadening effect. When relative delay between the laser pulse and the modulated signal is fixed, the larger the width of modulated signal waveform, the smaller the variation of output spectrum broadening. The shape, the depth and the width of control modulated signal waveform have direct effects on characteristic control performance of output spectrum of phase modulated laser pulse.
作者
周燕
李容
ZHOU Yan;LI Rong(Xi'an Kedagaoxin University,Xi'an 710100,China)
出处
《激光杂志》
CAS
北大核心
2022年第2期178-182,共5页
Laser Journal
基金
陕西省教育厅自然科学专项项目(No.20JK0780)。
关键词
调制信号
信号波形
光谱特性
波形形状
波形深度
波形宽度
modulating signal
signal waveform
spectral characteristics
waveform shape
waveform depth
waveform width
作者简介
周燕(1980-),女,硕士研究生,副教授,研究方向:检测技术与自动化装置。
