A 2-GHz discrete-spectrum waveband-division microscopic imaging system

作者：Xing Fangjian; Chen Hongwei^*; Lei Cheng; Chen Minghua; Yang Sigang; Xie Shizhong

来源：Optics Communications, 2015, 338: 22-26.

DOI：10.1016/j.optcom.2014.09.077

• Real-time imaging
• Ultrafast
• Discrete spectrum
• Wavelength-to-space-to-time mapping
• GHz imaging

Limited by dispersion-induced pulse overlap, the frame rate of serial time-encoded amplified microscopy is confined to the megahertz range. Replacing the ultra-short mode-locked pulse laser by a multi-wavelength source, based on waveband-division technique, a serial time stretch microscopic imaging system with a line scan rate of in the gigahertz range is proposed and experimentally demonstrated. In this study, we present a surface scanning imaging system with a record line scan rate of 2 GHz and 15 pixels. Using a rectangular spectrum and a sufficiently large wavelength spacing for waveband-division, the resulting 2D image is achieved with good quality. Such a superfast imaging system increases the single-shot temporal resolution towards the sub-nanosecond regime.

• 出版日期2015-3-1
• 单位清华大学