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A gas pressure sensor based on Brillouin scattering in a microscaled fiber is experimentally demonstrated. The microscaled fiber with a diameter of 1.9 μm is drawn from a commercial single-mode fiber. A Brillouin spectrum with multipeak structure is observed due to the coupling between longitudinal and shear acoustic wave caused by strong acoustic index contrast between glass and air. The proposed...
Brillouin scattering based optical fiber sensors (BOFS) have the unique advantages over other sensors such as long distance, fully distributed, and multi-parameter sensing. The progresses on the development of BOFS technology in Nanjing University are reviewed. The key technologies to make BOFS with ultra-long distance, high spatial resolution, and fast measuring speed are discussed and realized.
As an optical fiber sensing technology based on detecting spontaneous Brillouin scattering, Brillouin Optical Time-Domain Reflectometry (BOTDR) is attracting significant attention due to its immense potential applications in temperature or strain monitoring. To enhance the signal to noise ratio (SNR) of BOTDR system, a new BOTDR based on Hadamard sequence probe pulse is proposed. In the new BOTDR...
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