中国激光, 2019, 46 (6): 0614019, 网络出版: 2019-06-14
激光偏振态对光纤型太赫兹时域光谱仪的影响 下载: 1169次
Influence of Laser Polarization on Fiber-Type Terahertz Time-Domain Spectrometer
探测器 太赫兹时域光谱 激光偏振 光纤型太赫兹时域光谱仪 光电导天线 detectors terahertz time-domain spectroscopy laser polarization fiber-type terahertz time-domain spectrometer photoconductive antenna
摘要
采用光纤飞秒激光器与光纤耦合型太赫兹光电导天线相结合的方案,设计并研制了光纤型太赫兹时域光谱系统。通过实验研究了激光偏振态对太赫兹时域波形、强度以及光谱特性的影响,通过对飞秒激光偏振态的精确控制与优化,消除了时域脉冲分裂现象,获得了高信噪比的单脉冲太赫兹时域波形。
Abstract
A fiber-type terahertz (THz) time-domain spectrometer is designed by combining a fiber femtosecond laser with a fiber-coupled THz photoconductive antenna. The effect of laser polarization on the THz time-domain waveform, intensity, and spectral characteristics are studied experimentally. Via the precise control and the optimization of the polarization state of the femtosecond laser, the time-domain pulse splitting is eliminated, and a single-peak THz time-domain pulse with a high signal-to-noise ratio is obtained.
冯美琦, 孙青, 邓玉强, 丁晴, 李超辰, 赵昆. 激光偏振态对光纤型太赫兹时域光谱仪的影响[J]. 中国激光, 2019, 46(6): 0614019. Meiqi Feng, Qing Sun, Yuqiang Deng, Qing Ding, Chaochen Li, Kun Zhao. Influence of Laser Polarization on Fiber-Type Terahertz Time-Domain Spectrometer[J]. Chinese Journal of Lasers, 2019, 46(6): 0614019.