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本文提出了一种1024×8像素、700ps时间门控的SPAD线传感器，用于激光拉曼光谱和LIBS分析，解决了拉曼信号被荧光背景淹没的问题。该传感器通过时间域滤波有效抑制荧光，适用于太空和火星车上的行星探测任务。
Jet Propulsion Laboratory, Pasadena, CA 1 2 Raman spectroscopy is a nondestructive, label-free optical analysis technique used to obtain structural and compositional information without any advance preparation. However, the Raman signature is often overwhelmed by strong fluorescence background. Due to its generation mechanism, the fluorescence background can be filtered out in the “time domain” even though it contains exactly the same wavelength components as the Raman signature. To realize such functionality, highly sensitive, time-resolved imagers, such as an intensified chargecoupled devices (iCCDs) or streak cameras are the sensors of choice. These delicate instruments are generally costly, bulky, and unsuitable for space flight and planetary landings. Time-gated, single-photon avalanche diode (SPAD) cameras have been studied for time-resolved imaging modalities, such as fluorescence lifetime imaging microscopy [1], taking advantage of SPAD picosecond temporal resolution as well as
Yuki Maruyama1, Jordana Blacksberg2, Edoardo Charbon1
Delft University of Technology, Delft, The Netherlands,