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Single-Multi-Single Mode Fiber Optic Structure-Based Water Depth Sensor
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DOI：10.1109/JSEN.2019.2913801.png)
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摘要
En 中文
We propose and demonstrate a novel, easy to use water depth pressure sensor based on selective mode excitation using a single-multi-single mode structure. The multi-mode fiber of the single-multi-single mode structure was coiled in a loop to introduce losses and reduce the size of the sensor. The change in ellipticity of the multimode fiber loop caused a spectral shift in the transmission spectrum of the structure, which was used for sensing application. A sensitivity of similar to 0.63 nm/cm and an extinction ratio of similar to 7 dB over a wavelength range of 1550-1600 nm has been reported. The high extinction ratio was achieved by exciting higher order modes of the multi mode fiber by optimizing the core offset at both the input/output splices of the single-multi-single mode structure. We have also theoretically studied the transmission characteristics of the structure, which shows an excellent agreement with the experimental results.
Keyword:
Single-multi-single mode (SMS) structure
graded index multimode fiber
modal interference
optical fiber sensor
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IF:
4.5
论文数:
2.2W
被引数:
7.3W
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Underwater Depth and Temperature Sensing Based on Fiber Optic Technology for Marine and Fresh Water Applications.png)
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