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 TSP...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.展开更多
基金supported by the National Natural Science Foundation of China(Nos.61775142,61490710and 61705132)China Postdoctoral Science Foundation(No.2017M612726)Shenzhen Basic Research Project on Subject Layout(No.JCYJ20170412105812811)
文摘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.
