Zhihang Han, Cuiting Sun, Xiren Jin, Hang Jiang, Chong Yao, Shuo Zhang, Weiliang Liu, Tao Geng, Feng Peng, Weimin Sun, Libo Yuan. A polarization-independent torsion sensor based on the near-helical long period fiber grating[J]. Chinese Optics Letters, 2018, 16(10): 100601
- Chinese Optics Letters
- Vol. 16, Issue 10, 100601 (2018)
Fig. 1. (a) Experimental setup. (b) Schematic image of the NH-LPFG.
Fig. 2. Transmission spectra of the NH-LPFG under increasing rotation angles.
Fig. 3. Experimental setup for torsion measurement.
Fig. 4. (a) Transmission spectra and (b) wavelength shift of the NH-LPFG in response to the applied torsion in the non-polarization state.
Fig. 5. Transmission spectra of the NH-LPFG in two polarization states.
Fig. 6. Transmission spectra for the NH-LPFG in (a) 0 rad, (b) π / 4 rad π / 2 rad − 18.3
Fig. 7. Dependence of the resonance wavelength on temperature.
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