时间相关单光子计数光谱仪的优化  

Optimization of time-correlated single photon counting spectrometer

作　　者：张秀峰[1] 杜海英[1] 孙进生[1] 

机构地区：[1]大连民族学院机电信息工程学院,辽宁大连116600

出　　处：《强激光与粒子束》2011年第12期3417-3420,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(69827002)

摘　　要：分析了原有时间相关单光子计数光谱仪存在的不足,提出了改进方案。研制了高速数据采集系统,采用PCI总线技术、FPGA技术,开发了高速光谱数据采集卡,取代了原有的多道分析仪,数据采集速度达到20MB/s,比原有仪器提高了约200倍;改善了仪器的性能、减小了体积。介绍了光谱仪系统的集成和工作流程,并对仪器的性能进行分析,通过多种标准样品的试验数据分析和对比,光谱仪系统具有最高的灵敏度-单光子计数,测得荧光寿命可达到ps量级,而且可以测得时间分辨光谱。The paper proposes a performance improving scheme for the conventional time-correlated single photon counting spectrometer and develops a high speed data acquisition card based on PCI bus and FPGA technologies.The card is used to replace the multi-channel analyzer to improve the capability and decrease the volume of the spectrometer.The process of operation is introduced along with the integration of the spectrometer system.Many standard samples are measured.The experimental results show that the sensitivity of the spectrometer is single photon counting,and the time resolution of fluorescence lifetime measurement can be picosecond level.The instrument could measure the time-resolved spectroscopy.

关 键 词：时间相关 单光子计数 数据采集 PCI总线 荧光寿命 

分 类 号：TP73[自动化与计算机技术—检测技术与自动化装置]