A surface enhanced Raman scattering spectrum detection system based on fiber devices

作者：Liao Yanlin; Liu Ye; Cao Jie; Zhang Xingfang; Mao Qinghe^*

来源：Chinese Journal of Lasers, 2012, 39(7): 215-219.

DOI：10.3788/CJL201239.0715002

• 4-aminothiophenol
• Background suppression
• Excitation lasers
• Excitation light
• Excitation light sources
• Fiber devices
• Laser technique
• Low costs
• Near Infrared
• Near-infrared lasers
• Photon-counting mode
• Remote detection
• Residual excitation
• SERS spectrum
• Spectrum detection
• Surface enhanced Raman Scattering (SERS)
• Surface enhanced Raman spectroscopy
• Surface-enhanced Raman scattering spectrum
• System use

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 Raman 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.

• 出版日期2012