[1] [1] SHINER B. The impact of fiber laser technology on the world wide material processing market［C］. Proceedings of the CLEO: 2013, San Jose, California, Optical Society of America.

[3] [3] ARAI K, NAMIKAWA H, KUMATA K, et al. Aluminum or phosphorus co-doping effects on the fluorescence and structural properties of neodymium-doped silica glass［J］. J Appl Phys, 1986, 59(10): 3430-3436.

[4] [4] KOSINSKI S G, KROL D M, DUNCAN T M, et al. Raman and NMR spectroscopy of SiO2 glasses co-doped with Al2O3 and P2O5［J］. J Non-Cryst Solids, 1988, 105(1): 45-52.

[5] [5] DIGIOVANNI D J, MACCHESNEY J B, KOMETANI T Y. Structure and properties of silica containing aluminum and phosphorus near the AlPO4 join［J］. J Non-Cryst Solids, 1989, 113(1): 58-64.

[6] [6] PEDRAZZA U, ROMANO V, LTHY W. Yb3+:Al3+:sol-gel silica glass fiber laser［J］. Opt Mater, 2007, 29(7): 905-907.

[7] [7] UNGER S, SCHWUCHOW A, JETSCHKE S, et al. Optical properties of Yb-doped laser fibers in dependence on codopants and preparation conditions［C］// Proc. SPIE 6890, Optical Components and Materials V, 689016 (2008).

[8] [8] OKAZAKI T, SEKIYA E H, SAITO K. P concentration dependence of local structure around Yb3+ ions and optical properties in Yb-P-doped silica glasses［J］. Jpn J Appl Phys, 2019, 58(6): 062001.

[9] [9] LIU S, LI H, TANG Y, et al. Fabrication and spectroscopic properties of Yb3+-doped silica glasses using the sol-gel method［J］. Chin Opt Lett, 2012, 10(8): 081601.

[12] [12] GUO M, SHAO C, ZHANG Y, et al. Effect of B2O3 addition on structure and properties of Yb3+/Al3+/B3+-co-doped silica glasses［J］. J Am Ceram Soc, 2020, 103(8): 4275-4285.

[13] [13] DONG H, WANG Z, SHAO C, et al. Effect of co-dopants on the spectral property of Yb3+ doped silica glasses at 1018 nm［J］. Opt Mater, 2021, 111761.

[14] [14] XU W, REN J, SHAO C, et al. Effect of P5+ on spectroscopy and structure of Yb3+/Al3+/P5+ co-doped silica glass［J］. J Lumin, 2015, 167: 8-15.

[17] [17] SHAO C, XIE F, WANG F, et al. UV absorption bands and its relevance to local structures of ytterbium ions in Yb3+/Al3+/P5+-doped silica glasses［J］. J Non-Cryst Solids, 2019, 512: 53-59.

[18] [18] GUO M, SHAO C, SHI F, et al. Effect of thermal annealing on structures and properties of Yb3+/Al3+/P5+ co-doped silica glasses［J］. J Non-Cryst Solids, 2019, 522: 119563.

[20] [20] WANG F, HU L, XU W, et al. Manipulating refractive index, homogeneity and spectroscopy of Yb3+-doped silica-core glass towards high-power large mode area photonic crystal fiber lasers［J］. Opt Express, 2017, 25(21): 25960-25969.

[21] [21] YOUNGMAN R E, SEN S. Structural role of fluorine in amorphous silica［J］. J Non-Cryst Solids, 2004, 349: 10-15.

[22] [22] YOUNGMAN R E, SEN S. The nature of fluorine in amorphous silica ［J］. J Non-Cryst Solids, 2004, 337(2): 182-186.

[24] [24] AGARWAL A, DAVIS K M, TOMOZAWA M. A simple IR spectroscopic method for determining fictive temperature of silica glasses［J］. J Non-Cryst Solids, 1995, 185(1): 191-198.