Yancheng Guo, Yange Liu, Zhi Wang, Zhuokun Yao. Dual Resonance and Dual-Parameter Sensor of Few-Mode Fiber Long Period Grating[J]. Acta Optica Sinica, 2018, 38(9): 0906003
- Acta Optica Sinica
- Vol. 38, Issue 9, 0906003 (2018)
Fig. 1. (a)Effective refractive index of LP01 and LP11 modes as a function of wavelength, the insets are the mode fields of LP01 and LP11 modes; (b) grating period of LPG as a function of wavelength; (c) transmission spectrum of LPG with the grating period of 437.5 μm
Fig. 2. Transmission spectra of LPG with the change of applied axial strain and temperature
Fig. 3. Experiment setup of fabricating the LPG with a CO2 laser
Fig. 4. Transmission spectrum of LPG at different temperatures
Fig. 5. Wavelength shifts of the two resonance dips at different temperatures. (a) The first one; (b) the second one
Fig. 6. Transmission spectrum of LPG at different micro strains
Fig. 7. Wavelength shifts of the two resonance dips at different micro strains. (a) The first one; (b) the second one
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