Photonic Sensors, Volume. 4, Issue 4, 338(2014)
Analysis of the Tunable Asymmetric Fiber F-P Cavity for Fiber Strain Sensor Edge-Filter Demodulation
An asymmetric fiber (Fabry-Perot, F-P) interferometric cavity with the good linearity and wide dynamic range was successfully designed based on the optical thin film characteristic matrix theory; by adjusting the material of two different thin metallic layers, the asymmetric fiber F-P interferometric cavity was fabricated by depositing the multi-layer thin films on the optical fiber’s end face. The asymmetric F-P cavity has the extensive potential application. In this paper, the demodulation method for the wavelength shift of the fiber Bragg grating (FBG) sensor based on the F-P cavity is demonstrated, and a theoretical formula is obtained. And the experimental results coincide well with the computational results obtained from the theoretical model.
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Haotao CHEN, Youcheng LIANG. Analysis of the Tunable Asymmetric Fiber F-P Cavity for Fiber Strain Sensor Edge-Filter Demodulation[J]. Photonic Sensors, 2014, 4(4): 338
Received: Dec. 12, 2013
Accepted: Aug. 29, 2014
Published Online: Dec. 8, 2014
The Author Email: LIANG Youcheng (liangyoucheng@caac.net)