Surface-enhanced raman scattering torquemaster based on optical fiber fuse-tapered coupler

• Main Authors: WANG TINGYUN, FU XINGHU, CHEN ZHENYI, LIU LIN, CHEN NA, PANG FUFEI
• Format: Patent
• Language: Chinese; English
• Published: 10.03.2010
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to a surface-enhanced raman scattering torquemaster based on an optical fiber fuse-tapered coupler, comprising two monochromatic light sources, a 2*2 fuse-tapered optical fiber coupler and two high-sensitivity raman spectrometers. The two monochromatic light sources are connected to the two high-sensitivity raman spectrometers sequentially through two polaroid sheets, two focusing lens, two optical fiber coupling platforms and the 2*2 fuse-tapered optical fiber coupler; the 2*2 fuse-tapered optical fiber coupler is positioned in the solution or the gas to be tested; on the fused tapering zone part of the 2*2 fuse-tapered optical fiber coupler, evanescent wave excites the solution or gas molecule to be tested which is absorbed by a optical fiber surface metal nanometerparticles layer, so as to generate raman spectrum, couple into the optical fiber through the optical fiber fused tapering zone, and transmit to the high-sensitivity raman spectrometers, to detect theraman spectrum of the sol