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Post-fabrication refractive index sensitivity enhancement technique for single-fiber Mach-Zehnder interferometer

机译：单纤维Mach-Zehnder干涉仪的制造后折射率灵敏度增强技术

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摘要

A novel technique to enhance the sensitivity of single-fiber (SF) MZI based refractive index sensor is presented. An indigenously fabricated SF-MZI has been placed in MZI cascaded fiber loop mirror (FLM) and its sensitivity is enhanced from 20.24 nm/RIU to 40.92 nm/RIU over a relatively large range from 1.3344 RIU to 1.4532 RIU. Further, the RI sensitivity of SF-MZI can be improved from 41.03 nm/RIU to 59.84 nm/RIU by changing the orientation of the phase shifters incorporated inside the fiber loop of MZI cascaded FLM configuration. The RI sensitivity of the interferometer has been increased almost three-fold, for the first time, post-fabrication without inducing any physical change in its structure.
机译：提出了一种提高单纤维（SF）基于折射率传感器的灵敏度的新技术。将本发明制造的SF-MZI置于MZI级联纤维环镜（FLM）中，其灵敏度从20.24nm / Riu到40.92nm / Riu的增强，从1.3344 Riu到1.4532 Riu相对较大。此外，通过改变在MZI级联FLM构造的纤维环内的相移器的取向，可以从41.03nm / RIU到59.84nm / Ri提高SF-MZI的RI敏感性。干扰仪的RI敏感性在不诱导其结构的任何物理变化的情况下，干涉仪的敏感性几乎增加了几乎三倍。

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