High Sensitivity and High Stability Dual Fabry-Perot Interferometric Fiber-Optic Acoustic Sensor Based on Sandwich-Structure Composite Diaphragm
A dual Fabry-Perot (FP) interferometric fiber-optic acoustic sensor based on sandwich-structure composite diaphragm is proposed, where fixed phase difference is generated by two FP interferometers (FPIs) with different cavity length. An ellipse fitting differential cross multiplication (EF-DCM) inte...
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2021-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/9350610/ |
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| author | Wanjin Zhang Ping Lu Zhiyuan Qu Pingjie Fan Chaotan Sima Deming Liu Jiangshan Zhang |
| author_facet | Wanjin Zhang Ping Lu Zhiyuan Qu Pingjie Fan Chaotan Sima Deming Liu Jiangshan Zhang |
| author_sort | Wanjin Zhang |
| collection | DOAJ |
| description | A dual Fabry-Perot (FP) interferometric fiber-optic acoustic sensor based on sandwich-structure composite diaphragm is proposed, where fixed phase difference is generated by two FP interferometers (FPIs) with different cavity length. An ellipse fitting differential cross multiplication (EF-DCM) interrogation process is applied for phase demodulation to overcome drawbacks of quadrature point based intensity demodulation, such as temperature drifting, optical power jitter and limited dynamic range. Besides, benefiting from the large area sandwich-structure composite diaphragm, high sensitivity and wide flat frequency response are obtained. Experimental results show that phase sensitivity is −121.11 dB re 1 rad/μPa@250 Hz and sensitivity fluctuation is below 0.8 dB between 2-250Hz. To prove the high stability of the demodulation system, acoustic signal test is performed at different wavelength and different optical power and a fluctuation below 3% is observed. Moreover, profiting from the dual FP sensor structure, the acoustic sensor is get rid of influence of temperature drifting which usually leads to variation of cavity length of fiber optic acoustic sensor. The proposed sensor structure also overcomes drawbacks of traditional dual wavelength demodulation such as extra noise introduced by erbium doped fiber amplifier (EDFA) and high cost. |
| format | Article |
| id | doaj-art-7fe9c22209c24f29bfbeb0faced979e9 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-7fe9c22209c24f29bfbeb0faced979e92025-08-20T03:30:57ZengIEEEIEEE Photonics Journal1943-06552021-01-0113211310.1109/JPHOT.2021.30576669350610High Sensitivity and High Stability Dual Fabry-Perot Interferometric Fiber-Optic Acoustic Sensor Based on Sandwich-Structure Composite DiaphragmWanjin Zhang0https://orcid.org/0000-0001-7126-3316Ping Lu1https://orcid.org/0000-0003-4872-9805Zhiyuan Qu2Pingjie Fan3Chaotan Sima4https://orcid.org/0000-0001-6374-8719Deming Liu5Jiangshan Zhang6National Engineering Laboratory for Next Generation Internet Access Systems, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaNational Engineering Laboratory for Next Generation Internet Access Systems, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaNational Engineering Laboratory for Next Generation Internet Access Systems, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaNational Engineering Laboratory for Next Generation Internet Access Systems, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaNational Engineering Laboratory for Next Generation Internet Access Systems, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaNational Engineering Laboratory for Next Generation Internet Access Systems, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaDepartment of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, ChinaA dual Fabry-Perot (FP) interferometric fiber-optic acoustic sensor based on sandwich-structure composite diaphragm is proposed, where fixed phase difference is generated by two FP interferometers (FPIs) with different cavity length. An ellipse fitting differential cross multiplication (EF-DCM) interrogation process is applied for phase demodulation to overcome drawbacks of quadrature point based intensity demodulation, such as temperature drifting, optical power jitter and limited dynamic range. Besides, benefiting from the large area sandwich-structure composite diaphragm, high sensitivity and wide flat frequency response are obtained. Experimental results show that phase sensitivity is −121.11 dB re 1 rad/μPa@250 Hz and sensitivity fluctuation is below 0.8 dB between 2-250Hz. To prove the high stability of the demodulation system, acoustic signal test is performed at different wavelength and different optical power and a fluctuation below 3% is observed. Moreover, profiting from the dual FP sensor structure, the acoustic sensor is get rid of influence of temperature drifting which usually leads to variation of cavity length of fiber optic acoustic sensor. The proposed sensor structure also overcomes drawbacks of traditional dual wavelength demodulation such as extra noise introduced by erbium doped fiber amplifier (EDFA) and high cost.https://ieeexplore.ieee.org/document/9350610/Fiber optic acoustic sensordual Fabry-Perot interferometerssandwich-structure composite diaphragm |
| spellingShingle | Wanjin Zhang Ping Lu Zhiyuan Qu Pingjie Fan Chaotan Sima Deming Liu Jiangshan Zhang High Sensitivity and High Stability Dual Fabry-Perot Interferometric Fiber-Optic Acoustic Sensor Based on Sandwich-Structure Composite Diaphragm IEEE Photonics Journal Fiber optic acoustic sensor dual Fabry-Perot interferometers sandwich-structure composite diaphragm |
| title | High Sensitivity and High Stability Dual Fabry-Perot Interferometric Fiber-Optic Acoustic Sensor Based on Sandwich-Structure Composite Diaphragm |
| title_full | High Sensitivity and High Stability Dual Fabry-Perot Interferometric Fiber-Optic Acoustic Sensor Based on Sandwich-Structure Composite Diaphragm |
| title_fullStr | High Sensitivity and High Stability Dual Fabry-Perot Interferometric Fiber-Optic Acoustic Sensor Based on Sandwich-Structure Composite Diaphragm |
| title_full_unstemmed | High Sensitivity and High Stability Dual Fabry-Perot Interferometric Fiber-Optic Acoustic Sensor Based on Sandwich-Structure Composite Diaphragm |
| title_short | High Sensitivity and High Stability Dual Fabry-Perot Interferometric Fiber-Optic Acoustic Sensor Based on Sandwich-Structure Composite Diaphragm |
| title_sort | high sensitivity and high stability dual fabry perot interferometric fiber optic acoustic sensor based on sandwich structure composite diaphragm |
| topic | Fiber optic acoustic sensor dual Fabry-Perot interferometers sandwich-structure composite diaphragm |
| url | https://ieeexplore.ieee.org/document/9350610/ |
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