一种基于光纤器件的表面增强拉曼散射光谱检测系统  

A Surface Enhanced Raman Scattering Spectrum Detection System Based on Fiber Devices

作　　者：廖艳林[1,2] 刘晔[1] 曹杰[1] 张兴坊[1] 毛庆和[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所安徽省光子器件与材料重点实验室,安徽合肥230031 [2]安徽大学物理与材料科学学院,安徽合肥230039

出　　处：《中国激光》2012年第7期215-219,共5页Chinese Journal of Lasers

基　　金：国家973计划(2007CB936603);国家自然科学基金(11104282)资助课题

摘　　要：报道了一种基于表面增强拉曼散射(SERS)效应的结构简单、成本低的近红外拉曼光谱探测系统。该系统采用近红外半导体激光器作为激发光源。通过提高激发光源的输出背景抑制比,抑制激发光光纤传输产生的光纤拉曼信号,采用光纤型波分复用器滤除剩余激发光,利用光子计数模式的铟镓砷雪崩光电二极管作为探测器代替昂贵的近红外光电倍增管或近红外电荷耦合器件,实现了对4-胺苯并噻吩表面增强拉曼光谱的检测。该近红外光纤型检测系统具有结构简单、小型化、成本低廉以及远程检测等优势。A near-infrared fiber-type Raman spectrum detection system with low cost and simple configuration, which is based on the surface enhanced Raman scattering （SERS） effect, is reported. This system uses a near- infrared laser diode as the excitation light source. By improving the background suppression ratio of the excitation light, suppressing the Roman noise caused by the excitation laser propagating along the fiber, and eliminating the residual excitation light reflected from the nano-sample surface with cascaded wavelength-division-multiplexing couplers, the SERS spectrum for 4-aminothiophenol is successfully measured with an InGaAs~ avalanche photo diode detector in photon counting mode instead of the expensive near-infrared photomultiplier or near-infrared charge- coupled device. The fiber-type Raman spectrum detection system may have advantages of simple configuration, miniaturization, low cost and remote detection.

关 键 词：激光技术 光纤器件 检测 表面增强拉曼光谱 

分 类 号：TN248.1[电子电信—物理电子学]