Hongye Li, Xin Tian, Hao Li, Baiyi Wu, Xiaofan Zhao, Meng Wang, Chenhui Gao, Binyu Rao, Xiaoming Xi, Zilun Chen, Zefeng Wang, Jinbao Chen. Fiber oscillator of 5 kW using fiber Bragg gratings inscribed by a visible femtosecond laser[J]. Chinese Optics Letters, 2023, 21(2): 021404
- Chinese Optics Letters
- Vol. 21, Issue 2, 021404 (2023)
Fig. 1. (a) Schematic of the femtosecond laser phase scanning method. (b) Reflection spectra of HR-FBG and LR-FBG.
Fig. 2. Schematic of the high-power fiber oscillator.
Fig. 3. Output power versus pump power. Insets: beam profiles at the operation of 3005 W, 3992 W, 4528 W, and 5027 W.
Fig. 4. Laser spectra under different output power.
Fig. 5. Temperature of (a) HR-FBG and (b) LR-FBG at different operation power.
Fig. 6. Oscillator stability test: (a) variation of output power at the operation of ∼4030 W during 1 h, (b) variation of output power at the operation of 5027 W, and (c) variation of beam quality measured at ∼4030 W.
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