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Journal of Shanghai University（Natural Science Edition） ›› 2012, Vol. 18 ›› Issue (1): 7-11.doi: 10.3969/j.issn.1007-2861.2012.01.002

• Special Column of Key Laboratory of Specialty Fiber Optics and Optical Access Networks • Previous Articles     Next Articles

Experiment of 2×2 Fused Fiber Surface-Enhanced Raman Scattering

CHEN Zhen-yi,CHEN Na,HU Ling,WANG Ting-yun,PANG Fu-fei,LIU Lin   

  1. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China
  • Received:2011-12-16 Online:2012-02-29 Published:2012-02-29

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Abstract: Based on the optical fiber evanescent-wave excitation and surface-enhanced Raman scattering (SERS), we have carried out experimental studies on SERS characteristics of the 2×2 fused fiber coupler coated with Ag colloid particles. By stretching a pair of fused single-mode fibers with coating Ag colloid on its surface, the formed component can work as the surface-active substrate to perform Raman enhancement. With increase of the taper length, fiber core diameters decrease and less energy are bounded in the fiber. This enables stronger evanescent-wave to leak outward and become a Raman exciting source. In the experiments, the Raman spectra of R6G solutions has been detected at the coupling zone. The minimum detected concentration is 10-8 mol/L.

Key words: 2×2 fused fiber, evanescent-wave, R6G, surface active-substrate, surface-enhanced Raman scattering (SERS)

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