Title :
Simultaneous Measurement Based on Composite Interference Structure
Author :
Zhengrong Tong ; Jun Su ; Ye Cao ; Weihua Zhang
Author_Institution :
Sch. of Comput. & Commun. Eng., Tianjin Univ. of Technol., Tianjin, China
Abstract :
A novel double-parameters sensor based on composite interference structure has been designed and implemented in this letter. It can be regarded as a cascade of the traditional single mode-multimode-single mode structure and multimode-single mode-multimode structure. The output signal is a series of interference superposition; external parameters can be measured by monitoring the spectral characteristics of interference dips. The interesting properties of the sensor include good operation linearity. In addition, simultaneous measurement of temperature and refractive index have been achieved. The sensitivities of temperature and refractive index can reach up to 0.1385 nm/°C and 100.97 nm/RIU, respectively.
Keywords :
fibre optic sensors; light interferometry; refractive index measurement; temperature measurement; temperature sensors; composite interference structure; double-parameter sensor; external parameters; interference dips; interference superposition; multimode-single mode-multimode structure; output signal; refractive index sensitivity; simultaneous refractive index measurement; simultaneous temperature measurement; spectral characteristic monitoring; temperature sensitivity; traditional single mode-multimode-single mode structure; Interference; Optical fiber sensors; Optical fibers; Refractive index; Sensitivity; Temperature measurement; Temperature sensors; MSM; Optical sensor; SMS; simultaneous measurement;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2320593
