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A novel surface-enhanced Raman scattering (SERS) optical fiber sensor using biconical taper fiber is proposed. It is fabricated by fused tapering a multi-mode fiber and then coated the silver colloid on its waist. The Raman spectrum for R6G dye solution is obtained and the detection sensitivity is up to 10-9M.
A surface-enhanced Raman scattering (SERS) optical fiber sensor using biconical taper multi-mode fiber (MMF) is proposed. It is fabricated by fused elongating a multi-mode fiber and then coated the silver colloid on its waist. The Raman spectrum for R6G dye solution is measured and the detection sensitivity is 10-9 M.
In this paper, a new method is proposed to fabricate an optical fiber extrinsic Fabry-Perot interferometer (EFPI) as an ultrasonic sensor. An acoustic emission detecting system is constructed based on multiple EFPI sensors and demodulation circuit. Ultrasound detection experiments were done from both traditional piezoelectric transducer (PZT) and high voltage discharge. In the experiments, strong...
A novel liquid-level sensor was proposed and studied by using a specialty double-cladding fiber (DCF). The sensor operates according to a light wavelength modulation method which results from the variation of the surrounding refractive index (RI). As the surrounding RI changes, the effective refractive index of cladding mode of DCF increases or decreases and the phase-matching condition changes, so...
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