Xiao Shen, Guangli Yang, Yafei Wang, Yinggang Chen, Chunlei Yu, Wei Wei, Lili Hu. Preparation of Highly Tm3+-Doped Silica Fibers and Study of 2.0 μm Laser Performance[J]. Acta Optica Sinica, 2023, 43(4): 0414001
- Acta Optica Sinica
- Vol. 43, Issue 4, 0414001 (2023)
Fig. 1. Schematic diagrams of highly Tm3+-doped silica fiber prepared by coating on inner wall of silica capillary and tapering.(a) Coating; (b) heat treatment; (c) secondary fused tapering
Fig. 2. Spectral performance of highly Tm3+-doped high-silica glass. (a) Absorption cross section; (b) emission spectrum (inset is infrared transmission spectrum)
Fig. 3. Simplified energy level diagram of Tm3+ and cross relaxation between Tm3+ ions
Fig. 4. Physical properties of highly Tm3+-doped silica optical fiber. (a) Element distribution at end face of optical fiber (inset is end face of optical fiber) ; (b) refractive index distribution of optical fiber
Fig. 5. Images of fusion splicing between highly Tm3+ -doped silica optical fiber and passive silica optical fiber
Fig. 6. 1947 nm fiber laser based on all-fiber linear cavity structure
Fig. 7. Laser performance of highly Tm3+-doped silica optical fiber. (a) Slope efficiency for different fiber length; (b) laser spectrum of 4.6-cm highly Tm3+-doped silica optical fiber (inset is laser spectrum in range of 1944-1951 nm)
Fig. 8. 1947 nm signal source and Tm3+-doped fiber amplifier
Fig. 9. Gain characteristics of 2.3-cm highly Tm3+-doped silica optical fiber. (a) Output signal intensity for different pump power; (b) gain coefficient curve
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Table 1. Physical properties of highly Tm3+-doped high silica glass
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