Xiaobei Zhang, Haiyang Shao, Haiyang Pan, Yong Yang, Huawen Bai, Fufei Pang, Tingyun Wang. Simple capillary-based extrinsic Fabry–Perot interferometer for strain sensing[J]. Chinese Optics Letters, 2017, 15(7): 070601
- Chinese Optics Letters
- Vol. 15, Issue 7, 070601 (2017)
Fig. 1. (a) Illustration for fabricating the device, and (b) the reflection spectrum of the capillary-based FPI. Inset shows the propagation paths of the input and output light in the sensor device.
Fig. 2. (a) Reflection spectra of the fabricated FPI devices with different interferometer lengths and the capillary ID of 50 μm. (b)-(d) Microscopic images of fabricated FPI devices.
Fig. 3. Measured insertion loss for the devices with an inner capillary diameter of 50 μm.
Fig. 4. Illustration of the strain sensing experimental setup. EFPI, extrinsic FPI.
Fig. 5. (a) Spectral shift as the strain increases from 0 to
Fig. 6. Strain sensitivity of the sensor devices with different IDs and interferometer lengths.
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Table 1. Main Fusion Splicing Parameters in the Experiments
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