激光技术2013，Vol.37Issue(1)：52-55,4.DOI:10.7510/jgjs.issn.1001-3806.2013.01.013
基于短时傅里叶变换分析超短光脉冲的传输特性
Study on the characteristics of ultra-short optical pulse propagation based on short-time Fourier transformation
摘要
Abstract
Short-time Fourier transformation is widely used to expand 1 -D signal in temporal domain or spectral domain into the corresponding 2-D case in time-frequency domain. Effect of dispersion and initial chirp of pulse in fiber on signal propagation was numerically analyzed in detail by employing short-time Fourier transformation. Compared with conventional Fourier transformation, short-time Fourier transformation can more directly describe how the temporal and spectral features of optical pulse evolution vary with both dispersion and initial chirp. In addition, the evolutions of new frequency chirp induced by both dispersion and initial chirp can be clearly seen by using time-frequency analysis resulting from short-time Fourier transformation. Therefore, it completely overcomes the disadvantage of conventional Fourier transformation that is used to only compare signal transient in the spectral or temporal domain separately, and short-time Fourier transformation is expected to provide a new and effective approach to analyze the pulse propagation in fiber.关键词
光电子学/短时傅里叶变换/时频分析/色散/啁啾Key words
optoelectronics/short-time Fourier transformation/time-frequency analysis/dispersion/chirp分类
数理科学引用本文复制引用
张景贵,李勇帆,赵晋琴..基于短时傅里叶变换分析超短光脉冲的传输特性[J].激光技术,2013,37(1):52-55,4.基金项目
湖南省科技计划资助项目(2010GK3049) （2010GK3049）
湖南省普通高等学校教学改革研究课题资助项目(2011(462)) （2011(462）
湖南省高校科技创新团队计划资助项目(湘教通[2010]212号) （湘教通[2010]212号）
