该激光脉冲调制系统已经应用在皮秒时间相关单光子计数光谱仪系统中，取得了比较理想的效果。
The laser pulse modulation system has been used in a picosecond time-correlated single photon counting spectrometer with perfect effect.
本文的研究方向和内容是根据国家自然科学基金项目—皮秒时间相关单光子计数光谱仪研制来确定的。
The research direction and content of this article is based on the NSFC project -the development of picosecond time-correlated single photon counting (TCSPC) spectrometer.
在讨论原子级别时间的时候，物理学家用起皮秒（百万兆分之一秒）甚至飞秒（千万亿分之一秒）来都没任何不便。这是一方面。
Physicists have no trouble using, on the one hand, picoseconds (trillionths of a second) or even femtoseconds (quadrillionths of a second) to discuss time at the atomic scale.
为了进行测量，在预定的时间(通常为60秒钟)内，给样品施加恒定的电压。然后，用皮安计或静电计测量产生的电流。
To make the measurement, a constant voltage is applied for a predefined period, usually 60 seconds, and the resulting current is measured with a picoammeter or electrometer.
采用皮秒级事件计时器等技术测量往返时间差，修正精度可以达到毫米量级。
With Picosecond Event Timer and other techniques measuring the differential time of flight, the accuracy of the atmospheric delay could achieve millimeter level.
采用皮秒级事件计时器等技术测量往返时间差，修正精度可以达到毫米量级。
With Picosecond Event Timer and other techniques measuring the differential time of flight, the accuracy of the atmospheric delay could achieve millimeter level.
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