Qingguo Song, Bolin Ye, Xiangpeng Xiao, Chengjun Huang, Chengbo Mou, Zhijun Yan, Lin Zhang. Theoretical and experimental analysis of second order Bragg resonance of 45° TFG and its fiber laser application[J]. Chinese Optics Letters, 2022, 20(1): 012201
- Chinese Optics Letters
- Vol. 20, Issue 1, 012201 (2022)
Fig. 1. (a) Simulation of normalized index change at different exposure time; (b) simulation of second order reflectivity against exposure time.
Fig. 2. (a) Experimental and theoretical relationship between the 2nd-OBR wavelength and the grating tilt angle; (b) 2nd-OBR strength against the tilt angle.
Fig. 3. Measured PDL spectra of the corresponding grating within 30 nm spectrum range showing 2nd-OBR in both p polarization and
Fig. 4. Schematic of the demonstrated fiber laser using the 2nd-OBR generated by a 45° TFG.
Fig. 5. (a) Typical output spectrum of the fiber laser; (b) slope efficiency of the fiber laser.
Fig. 6. (a) PER spectra of the laser; (b) tuning ability demonstration of the fiber laser; (c) temperature sensitivity of the fiber laser; (d) output wavelength and amplitude variation of the fiber laser within 1 h in laboratory conditions.
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