皮秒时间相关单光子计数光谱仪的核心技术  

The Key Technology of Picosecond Time-Correlated Single Photon Counting Spectrometer

作　　者：张秀峰[1,3] 宋克菲[2] 于涛[3] 韩炳冬[1,3] 盛翠霞[4] 林久令[1,5] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院长春光学精密机械与物理研究所,应用光学国家重点实验室,吉林长春130033 [3]北方液晶工程研究开发中心,吉林长春130031 [4]内蒙古工业大学,内蒙古呼和浩特010062 [5]天津工业大学理学院,天津300160

出　　处：《光谱学与光谱分析》2004年第12期1489-1493,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金仪器专项 (6982 70 0 2 )资助项目

摘　　要：研制的皮秒时间相关单光子计数光谱仪利用时间相关单光子计数 (TCSPC)技术 ,采用了具有分光时间弥散动态和静态补偿特性的光栅分光系统 ,解决了传统分光系统的光信号时间弥散问题 ;使用多道谱分析仪开设时间窗口 ,测量荧光衰减曲线和时间分辨光谱 ;用荧光衰减曲线的多指数拟合方法处理数据。给出了光谱仪的原理和总体方案 ,介绍了系统的集成和工作流程。通过各种标准样品的试验数据分析和对比 ,得出系统所测荧光寿命可达到 ps量级 ,而且具有最高的灵敏度———单光子计数 ,时间分辨率达到 8 8ps。The picosecond time-correlated single photon counting spectrometer developed uses the TCSPC technique and grating splitter technique that can compensate the time spread dynamically and statically. The time spread caused by the conventional optical system can be eliminated completely. The multichannel analyzer is used to measure the fluorescence decay curves and the time-resolved spectrum by opening the time windows. The method for multi-exponential fitting to the fluorescence decay is also used to deal with the data. The system theory and design of the spectrometer are presented in detail, and the process of operation is introduced with the integration of the system. Many standard samples have been measured, and the data have been analyzed and contrasted. Experimental results show that the fluorescence life-span scaled by the spectrometer reaches picosecond distinction, and the spectrometer's sensitivity is single photon counting. Time resolution of the spectrometer is 8.8 ps.

关 键 词：荧光衰减 时间相关 单光子计数 光谱仪 荧光寿命 时间窗口 曲线 开设 弥散 利用时间 

分 类 号：O433.1[机械工程—光学工程] O482.31[理学—光学]