High Power Laser Science and Engineering, 2019, 7 (1): 01000e13, Published Online: Mar. 26, 2019
Accurate reconstruction of electric field of ultrashort laser pulse with complete two-step phase-shifting
Abstract
This paper presents a complete two-step phase-shifting (TSPS) spectral phase interferometry for direct electric-field reconstruction (SPIDER) to improve the reconstruction of ultrafast optical fields. Here, complete TSPS acts as a balanced detection that can not only remove the effect of the dc term of the interferogram, but also reduce measurement noises, and thereby improve the capability of SPIDER to measure the pulses with narrow spectra or complex spectral structures. Some prisms are chosen to replace some environment-sensitive optical components, especially reflective optics to improve operating stability and improve signal-to-noise ratio further. Our experiments show that the available shear can be decreased to 1.5% of the spectral width, which is only about $1/3$ compared with traditional SPIDER.
Yi Cai, Zhenkuan Chen, Shuiqin Zheng, Qinggang Lin, Xuanke Zeng, Ying Li, Jingzhen Li, Shixiang Xu. Accurate reconstruction of electric field of ultrashort laser pulse with complete two-step phase-shifting[J]. High Power Laser Science and Engineering, 2019, 7(1): 01000e13.