Approach to broadband terahertz pulse field detection and recovery with electro-optic sampling measurement

作者：Zhu, Li-Guo^*; Li, Ze-Ren; Pu, Yi-Kang

来源：Optics Communications, 2010, 283(9): 1873-1876.

DOI：10.1016/j.optcom.2009.12.040

Electro-optic sampling (EOS) measurement of terahertz (THz) pulses inherently leads to distortions, especially for relatively broadband THz pulses. In this paper, we proposed an approach to broadband THz pulse field detection and recovery with EOS measurement. In our approach, we use an EOS measurement utilizing a thick GaP crystal, which has a high transverse optical phonon frequency, to reduce the distortions caused by dispersive propagation, interface reflection and Fabry-Perot effect (multiple reflections within an EO crystal). And a retrieval algorithm is designed to eliminate the distortion of broadband THz pluses after passing through the thick GaP crystal (The distortion in a thick GaP crystal is mainly attributed to phase mismatching between the THz Pulse and the sampling laser pulse.), in which preconditioned conjugated gradient method is used.

• 出版日期2010-5-1
• 单位中国工程物理研究院流体物理研究所; 中国工程物理研究院; 清华大学