Intensity Demodulation Based Fiber Sensor for Dynamic Measurement of Acoustic Wave and Lateral Pressure Simultaneously
In this paper, we propose an intensity demodulation based fiber sensor for dual-parameters sensing of acoustic wave and lateral pressure. The sensor consists of a long period fiber grating (LPFG) inserted into a Sagnac interferometer (SI). The LPFG is kept straight and fixed on a polyethylene tereph...
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| Format: | Article |
| Language: | English |
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IEEE
2016-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/7740909/ |
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| author | Xin Fu Ping Lu Wenjun Ni Li Liu Hao Liao Deming Liu Jiangshan Zhang |
| author_facet | Xin Fu Ping Lu Wenjun Ni Li Liu Hao Liao Deming Liu Jiangshan Zhang |
| author_sort | Xin Fu |
| collection | DOAJ |
| description | In this paper, we propose an intensity demodulation based fiber sensor for dual-parameters sensing of acoustic wave and lateral pressure. The sensor consists of a long period fiber grating (LPFG) inserted into a Sagnac interferometer (SI). The LPFG is kept straight and fixed on a polyethylene terephthalate membrane for acoustic detection. A tunable laser source (TLS) is utilized to illuminate the sensor. The acoustic wave will produce a time-varying intensity signal that consists of an alternating current (ac) component and a direct current (dc) component. The ac component contains the acoustic information, while the dc level is determined by the transmittance of the sensor in the static condition (without acoustic signal applied on the sensor). Since the lateral pressure induced wavelength shift of the SI will change the transmittance at the TLS wavelength, the dc level varies with different lateral pressure applied on the sensor. Therefore, the acoustic wave and lateral pressure can be demodulated, respectively, by monitoring the ac component and dc level in the output signal. In the experiment, output time-domain signals with 500 Hz ac components and different dc values are acquired when 500 Hz acoustic wave and different lateral pressure is applied on the sensor. |
| format | Article |
| id | doaj-art-e57e360d4e144711a7aa75ec5e9860f7 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-e57e360d4e144711a7aa75ec5e9860f72025-08-20T03:33:03ZengIEEEIEEE Photonics Journal1943-06552016-01-018611310.1109/JPHOT.2016.26275467740909Intensity Demodulation Based Fiber Sensor for Dynamic Measurement of Acoustic Wave and Lateral Pressure SimultaneouslyXin Fu0Ping Lu1Wenjun Ni2Li Liu3Hao Liao4Deming Liu5Jiangshan Zhang6Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, ChinaDepartment of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, ChinaIn this paper, we propose an intensity demodulation based fiber sensor for dual-parameters sensing of acoustic wave and lateral pressure. The sensor consists of a long period fiber grating (LPFG) inserted into a Sagnac interferometer (SI). The LPFG is kept straight and fixed on a polyethylene terephthalate membrane for acoustic detection. A tunable laser source (TLS) is utilized to illuminate the sensor. The acoustic wave will produce a time-varying intensity signal that consists of an alternating current (ac) component and a direct current (dc) component. The ac component contains the acoustic information, while the dc level is determined by the transmittance of the sensor in the static condition (without acoustic signal applied on the sensor). Since the lateral pressure induced wavelength shift of the SI will change the transmittance at the TLS wavelength, the dc level varies with different lateral pressure applied on the sensor. Therefore, the acoustic wave and lateral pressure can be demodulated, respectively, by monitoring the ac component and dc level in the output signal. In the experiment, output time-domain signals with 500 Hz ac components and different dc values are acquired when 500 Hz acoustic wave and different lateral pressure is applied on the sensor.https://ieeexplore.ieee.org/document/7740909/Long period fiber grating (LPFG)Sagnac interferometer (SI)dual-parameters sensingacoustic wavelateral pressure. |
| spellingShingle | Xin Fu Ping Lu Wenjun Ni Li Liu Hao Liao Deming Liu Jiangshan Zhang Intensity Demodulation Based Fiber Sensor for Dynamic Measurement of Acoustic Wave and Lateral Pressure Simultaneously IEEE Photonics Journal Long period fiber grating (LPFG) Sagnac interferometer (SI) dual-parameters sensing acoustic wave lateral pressure. |
| title | Intensity Demodulation Based Fiber Sensor for Dynamic Measurement of Acoustic Wave and Lateral Pressure Simultaneously |
| title_full | Intensity Demodulation Based Fiber Sensor for Dynamic Measurement of Acoustic Wave and Lateral Pressure Simultaneously |
| title_fullStr | Intensity Demodulation Based Fiber Sensor for Dynamic Measurement of Acoustic Wave and Lateral Pressure Simultaneously |
| title_full_unstemmed | Intensity Demodulation Based Fiber Sensor for Dynamic Measurement of Acoustic Wave and Lateral Pressure Simultaneously |
| title_short | Intensity Demodulation Based Fiber Sensor for Dynamic Measurement of Acoustic Wave and Lateral Pressure Simultaneously |
| title_sort | intensity demodulation based fiber sensor for dynamic measurement of acoustic wave and lateral pressure simultaneously |
| topic | Long period fiber grating (LPFG) Sagnac interferometer (SI) dual-parameters sensing acoustic wave lateral pressure. |
| url | https://ieeexplore.ieee.org/document/7740909/ |
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