摘要
基于反射式激光诱导荧光技术,以半导体激光器(中心波长532nm)为激发光源,研制了微流控芯片激光诱导荧光光纤检测系统。采用光纤束传感器使检测系统结构简单、紧凑、抗干扰力强,采用光子计数方法提高检测灵敏度。以罗丹明B为检测物质,实验发现荧光峰值明显,重复检测性好,其最小检出限为5×10^-12mol/L,线性范围为10^-6~10^-12mol/L。
Based on reflecting laser-induced fluorescence,an optical fiber detecting system for micro-fluidic chip laser induced fluorescence using solid-state (532 nm) as excitation source is developed. The use of optical fiber detector makes the system simple,compact and high anti-disturbing. And the photon count method is used to improve the sensitivity of the detection. Using rhodamine B as the sample. The detection limit and the linear dynamica are 5×10^-12 mol/L and 10^-5-10^-12 mol/ L. distinct fluorescence signal with good repetition is showed in the experiment.
出处
《光电子.激光》
EI
CAS
CSCD
北大核心
2007年第11期1356-1358,共3页
Journal of Optoelectronics·Laser
基金
广东省自然科学基金资助项目(05300261)
广东省科技计划资助项目(2005B10201001)
关键词
激光诱导
荧光
光纤束传感器
微流控芯片
laser-induced fluoresence
optic fiber beam sensor
micro-fluidic chip
作者简介
王洪(1964-),男,博士,副教授,主要从事光通信网络与光纤感技术方面的研究.E-mail:phhwang@scut.edu.cn