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A tadpole-shape fiber sensor, with S-bend fiber cascading spherical shape, has been proposed and experimentally realized in this work. In our experiments, the output spectrum of the proposed sensor was found to be shifted with the changing of the refractive index and the temperature. Experiments results showed that the highest sensitivity of the refractive index was up to −114.845nm/RIU with a wide...
In order to improving the sensing length of the Distributed Optical Fiber Temperature Testing System (DTS), a broadband pulsed source at 1.66um was proposed and demonstrated. A Raman frequency shifter, composed of a certain length single mode fiber (SMF) and a fiber band-pass filter was used as a key device to obtain the proposed light source. By changing the output power of the pump laser, the proposed...
In this paper, a polarization maintaining fiber (PMF) is used as the sensing element for microfluidic velocity measurement. The proposed fiber microfluidic velocity sensor adopts the Sagnac loop structure, where the PMF is incorporated in the fiber loop. The microfluidic velocity measurement is realized by monitoring the output spectrum of the Sagnac loop. Different microfluidic velocity causes different...
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