| XIONG Lingyi,YU Yangfei,DUAN Shaoxiang,LIU Bo,LIN Wei,YAO Yuan.Simulations of ultra-high sensitivity RI sensor in triple-core fiber with modified Vernier effect:Application in marine RI measurement[J].Optoelectronics Letters,2023,(8):481-486 |
| Simulations of ultra-high sensitivity RI sensor in triple-core fiber with modified Vernier effect:Application in marine RI measurement |
| Author Name | Affiliation | | XIONG Lingyi | Institute of Modern Optics, Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China | | YU Yangfei | Marine Protected Area Administration of Sansha City, Sansha 573100, China | | DUAN Shaoxiang | Institute of Modern Optics, Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China
Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519000, China | | LIU Bo | Institute of Modern Optics, Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China
Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519000, China | | LIN Wei | Institute of Modern Optics, Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China | | YAO Yuan | Institute of Modern Optics, Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China
Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519000, China |
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| Abstract: |
| We proposed an ultra-high sensitivity triple-core fiber refractive index (RI) sensor with a modified Vernier effect for marine RI measurement and demonstrated it by numerical simulation. This sensor composes a pair of parallelized spatial mode Mach-Zehnder interferometers (MZIs), both of which are involved in sensing, but possess different interfering modes. By designing an MZI RI fiber optic sensor based on Vernier effect in air, it is demonstrated that in the low RI such as air environment, only the modes involved in sensing interference are affected by the environment to generate Vernier effect. In the high RI marine environment, both sensing interferometer and reference interferometer need to be affected by the ambient RI to generate Vernier effect. The simulation results indicate that the proposed novel sensing structure can amplify its sensitivity from ?15 428 nm/RIU to ?24 857 nm/RIU in the marine environment. |
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