Brillouin Scattering From Hybrid Acoustic Wave in a Microscaled Fiber for Gas Pressure Sensing
A gas pressure sensor based on Brillouin scattering in a microscaled fiber is experimentally demonstrated. The microscaled fiber with a diameter of 1.9 μm is drawn from a commercial single-mode fiber. A Brillouin spectrum with multipeak structure is observed due to the coupling between lo...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2017-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/7870641/ |
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| Summary: | A gas pressure sensor based on Brillouin scattering in a microscaled fiber is experimentally demonstrated. The microscaled fiber with a diameter of 1.9 μm is drawn from a commercial single-mode fiber. A Brillouin spectrum with multipeak structure is observed due to the coupling between longitudinal and shear acoustic wave caused by strong acoustic index contrast between glass and air. The proposed pressure sensor is based on the fact that the Brillouin peak frequency at ∼8.5 GHz and ∼9 GHz shifts when environment air pressure changes. It exhibits a pressure sensitivity of approximately 0.066 MHz/kPa. This device provides a candidate for gas pressure measurement. We also measure the temperature response of the spectra. It is found that the temperature coefficient is about two times higher than that of the SMF. This phenomenon exhibits potential for simultaneous temperature and pressure sensor. |
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| ISSN: | 1943-0655 |