Versatile Vibration Sensing Using a Tapered Photonic Crystal Fiber With a Featured Core
On the basis of intensity modulation, a vibration sensor using a tapered photonic crystal fiber (PCF) is demonstrated. The fiber is a solid-core PCF with a central air hole embedded in the core region. The addition of the air-hole initiates the core/cladding intermodal coupling, and conse...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2020-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9039755/ |
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| Summary: | On the basis of intensity modulation, a vibration sensor using a tapered photonic crystal fiber (PCF) is demonstrated. The fiber is a solid-core PCF with a central air hole embedded in the core region. The addition of the air-hole initiates the core/cladding intermodal coupling, and consequently, modulates the output light intensity when the fiber is under external disturbance. The sensing unit is configured by firstly tapering the PCF down to a waist of 72.6 μm, and then splicing its two ends to a single-mode fiber (SMF) and a multi-mode fiber (MMF), respectively. The sensor is then used for measuring a variety of vibrational signals, such as single frequency (in the range of 30∼10000 Hz), dual-frequency vibrations, and vibration accelerations (with linear responses from 0.5 to 10 m/s<sup>2</sup>). In addition, the sensitivity, influenced by varying the length of the sensor head, is also investigated. |
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| ISSN: | 1943-0655 |