[1] Lin M B, Ruan J Y, Lao H X et al. L-band extended EDFA co-pumped by backward ASE[J/OL]. Laser & Optoelectronics Progress, 1-6. https:∥www.opticsjournal.net/Articles/HPAbstract?manu_number=L232019

[2] He L, Yin X K, Chen Y et al. Fabrication and amplification characteristics of Erbium/Ytterbium co-doped fiber in the L-band[J]. Chinese Journal of Lasers, 51, 1306003(2024).

[3] Gu Z M, Chu Y B, Hu X W et al. High absorption, high efficiency, low cluster erbium doped fiber and its amplification performance[J]. Chinese Journal of Lasers, 49, 0716003(2022).

[4] Chu Y B, Li J Y. Research progress and development trend of broadband amplified optical fiber[J]. Chinese Journal of Luminescence, 43, 1678-1689(2022).

[5] He T, Wen J X, Wang Q et al. Fabrication and near-infrared luminescent properties of bismuth/erbium Co-doped silica fiber[J]. Chinese Journal of Lasers, 45, 1006004(2018).

[6] Luo Y H, Yan B B, Zhang J Z et al. Development of Bi/Er co-doped optical fibers for ultra-broadband photonic applications[J]. Frontiers of Optoelectronics, 11, 37-52(2018).

[7] Chen W W, Qiu J R, Dong G P. Research progress on ultra-broadband luminescence of Bi-doped glass and fiber(invited)[J]. Infrared and Laser Engineering, 52, 20230097(2023).

[8] Kuwada Y, Fujimoto Y, Nakatsuka M. Ultrawideband light emission from bismuth and erbium doped silica[J]. Japanese Journal of Applied Physics, 46, 1531-1532(2007).

[9] Peng M Y, Zhang N, Wondraczek L et al. Ultrabroad NIR luminescence and energy transfer in Bi and Er/Bi co-doped germanate glasses[J]. Optics Express, 19, 20799-20807(2011).

[10] Luo Y H, Wen J X, Zhang J Z et al. Bismuth and erbium codoped optical fiber with ultrabroadband luminescence across O-, E-, S-, C-, and L-bands[J]. Optics Letters, 37, 3447-3449(2012).

[11] Zhang J Z, Sathi Z M, Luo Y H et al. Toward an ultra-broadband emission source based on the bismuth and erbium Co-doped optical fiber and a single 830 nm laser diode pump[J]. Optics Express, 21, 7786-7792(2013).

[12] Firstov S V, Riumkin K E, Khegai A M et al. Wideband bismuth- and erbium-codoped optical fiber amplifier for C+L+U-telecommunication band[J]. Laser Physics Letters, 14, 110001(2017).

[13] Firstov S V, Alyshev S V, Riumkin K E et al. Laser-active fibers doped with bismuth for a wavelength region of 1.6‒1.8 μm[J]. IEEE Journal of Selected Topics in Quantum Electronics, 24, 0902415(2018).

[14] Liu S K, Yin X K, He L et al. High-germanium bismuth-doped fibers for U-band efficiency amplification[J]. Chinese Journal of Lasers, 51, 0606005(2024).

[15] Firstov S, Levchenko A, Kharakhordin A et al. Effect of drawing conditions on optical properties of bismuth-doped high-GeO2‒SiO2 fibers[J]. IEEE Photonics Technology Letters, 32, 913-916(2020).

[16] Dianov E M, Firstov S V, Khopin V F et al. Bismuth-doped fibers and fiber lasers for a new spectral range of 1600-1800 nm[J]. Proceedings of SPIE, 9728, 97280U(2016).

[17] Liu S K, Yin X K, Gu Z M et al. High bismuth-doped germanosilicate fiber for efficient E+S-band amplification[J]. Optics Letters, 49, 314-317(2024).

[18] Khegai A, Afanasiev F, Ososkov Y et al. The influence of the MCVD process parameters on the optical properties of bismuth-doped phosphosilicate fibers[J]. Journal of Lightwave Technology, 38, 6114-6120(2020).

[19] Liu S K, He L, Yin X K et al. Research on high absorption germanosilicate Bi-doped fiber and its gain performance[J]. Chinese Journal of Lasers, 51, 0206005(2024).