Journal
IEEE PHOTONICS JOURNAL
Volume 11, Issue 1, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2019.2891245
Keywords
Taper; CO2 Laser; strain; temperature; simultaneous measurement
Funding
- National Nature Science Foundation of China [61377084, 41174161]
- National Natural Science Foundation of China [U1831115, U1631239]
- Chinese Academy of Sciences [U1831115, U1631239, CAS-KLAOT-KF201501, CAS-KLAOT-KF201605]
- Opening Project of Key Laboratory of Astronomical Optics Technology
- Nanjing Institute of Astronomical Optics Technology
- Aeronautical Science Foundation of China [201608P6003]
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A novel sensor structure has been proposed and experimentally investigated for simultaneous strain and temperature measurement. The structure is fabricated by weak power modulation of CO2 laser exposure on tapered long period fiber grating (LPFG). Compared with the transmission spectrum of the tapered LPFG, two peaks appear in the transmission spectrum of the novel structure. These resonance peaks exhibit different sensitivity responses; thus, simultaneous measurement of strain and temperature is realized by monitoring the wavelength shift of the two peaks. Experiment results indicate that strain sensitivities of the two peaks are 1.82 pm/mu epsilon and 8.17 pm/mu epsilon and temperature sensitivities are 47.9 pm/degrees C and 65 pm/degrees C, respectively.
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