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Timestamp: 2019-04-22 05:11:45+00:00

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Efficient continuous-wave diode-pumped laser operation of Czochralski grown Er:Yb:Lu2Si2O7 crystal is reported. Polarized absorption and emission spectra, fluorescence lifetimes, and energy transfer efficiency from Yb3+ to Er3+ were determined. A maximal output power of 522 mW was achieved at 1620 nm with slope efficiency of 15.8% and absorbed pump threshold of 470 mW. Among the Er3+ and Yb3+ co-doped materials with long fluorescence lifetimes of the upper level 4I13/2, which are candidates for gain media of pulsed laser around 1.55 μm with high energy, comprehensive performance of the Er:Yb:Lu2Si2O7 crystal is the best till now.
K. N. Gorbachenya, V. E. Kisel, A. S. Yasukevich, V. V. Maltsev, N. I. Leonyuk, and N. V. Kuleshov, “High efficient continuous-wave diode-pumped Er,Yb:GdAl3(BO3)4 laser,” Opt. Lett. 38(14), 2446–2448 (2013).
K. N. Gorbachenya, V. E. Kisel, A. S. Yasukevich, V. V. Maltsev, N. I. Leonyuk, and N. V. Kuleshov, “Eye-safe 1.55 μm passively Q-switched Er,Yb:GdAl3(BO3)4 diode-pumped laser,” Opt. Lett. 41(5), 918–921 (2016).
H. Zhu, D. Tang, Y. Duan, D. Luo, and J. Zhang, “Laser operation of diode-pumped Er,Yb co-doped YAG ceramics at 1.6 μm,” Opt. Express 21(22), 26955–26961 (2013).
N. A. Tolstik, V. E. Kisel, N. V. Kuleshov, V. V. Maltsev, and N. I. Leonyuk, “Er,Yb:YAl3(BO3)4—efficient 1.5 μm laser crystal,” Appl. Phys. B 97(2), 357–362 (2009).
P. Zhang, Z. Chen, Y. Hang, Z. Li, H. Yin, S. Zhu, S. Fu, and A. Li, “Enhanced 2.7μm mid-infrared emissions of Er3+ via Pr3+ deactivation and Yb3+ sensitization in LiNbO3 crystal,” Opt. Express 24(22), 25202–25210 (2016).
S. Taccheo, G. Sorbello, P. Laporta, G. Karlsson, and F. Laurell, “230-mW diode-pumped single-frequency Er:Yb laser at 1.5 μm,” IEEE Photonics Technol. Lett. 13(1), 19–21 (2001).
A. Jaffrès, P. Loiseau, G. Aka, B. Viana, C. Larat, and E. Lallier, “CW diode pumped Er,Yb,Ce:CAS single crystal 1.5 μm laser,” Laser Phys. 24(12), 125801 (2014).
J. H. Huang, Y. J. Chen, J. H. Huang, X. H. Gong, Y. F. Lin, Z. D. Luo, and Y. D. Huang, “Spectroscopic investigation of Dy3+:Lu2Si2O7 single crystal: A potential 589 nm laser medium,” Opt. Mater. 72, 156–160 (2017).
L. Pidol, A. Kahn-Harari, B. Viana, B. Ferrand, P. Dorenbos, J. T. M. Haas, C. W. E. Eijk, and E. Virey, “Scintillation properties of Lu2Si2O7:Ce3+, a fast and efficient scintillator crystal,” J. Phys. Condens. Matter 15(12), 2091–2102 (2003).
H. Feng, D. Z. Ding, H. Y. Li, S. Lu, S. K. Pan, X. F. Chen, and G. H. Ren, “Annealing effects on Czochralski grown Lu2Si2O7:Ce3+ crystals under different atmospheres,” J. Appl. Phys. 103(8), 083109 (2008).
M. Nikl, G. H. Ren, D. Z. Ding, E. Mihokova, V. Jary, and H. Feng, “Luminescence and scintillation kinetics of the Pr3+ doped Lu2Si2O7 single crystal,” Chem. Phys. Lett. 493(1–3), 72–75 (2010).
C. W. Xu, D. Y. Tang, X. D. Xu, L. H. Zheng, J. Zhang, W. W. Tan, D. Z. Li, L. B. Su, and J. Xu, “Diode-pumped femtosecond passively mode-locked Yb:LPS laser,” Laser Phys. Lett. 9(10), 726–729 (2012).
J. S. Liao, Y. F. Lin, Y. J. Chen, Z. D. Luo, E. Ma, X. H. Gong, Q. G. Tan, and Y. D. Huang, “Radiative-trapping and fluorescence-concentration quenching effects of Yb:YAl3(BO3)4 crystals,” J. Opt. Soc. Am. B 23(12), 2572–2580 (2006).
C. Li, C. Wyon, and R. Moncorge, “Spectroscopic properties and fluorescence dynamics of Er3+ and Yb3+ in Y2SiO5,” IEEE J. Quantum Electron. 28(4), 1209–1221 (1992).
S. Taccheo, G. Sorbello, S. Longhi, and P. Laporta, “Measurement of the energy transfer and up-conversion constants in Er-Yb-doped phosphate glass,” Opt. Quantum Electron. 31(3), 249–262 (1999).
L. Zhang, H. Lin, G. Zhang, X. Mateos, J. M. Serres, M. Aguiló, F. Díaz, U. Griebner, V. Petrov, Y. Wang, P. Loiko, E. Vilejshikova, K. Yumashev, Z. Lin, and W. Chen, “Crystal growth, optical spectroscopy and laser action of Tm3+-doped monoclinic magnesium tungstate,” Opt. Express 25(4), 3682–3693 (2017).
Fig. 1 Photograph of the grown Er:Yb:LPS single crystal.
Fig. 2 Room temperature polarized absorption spectra from 850 to 1070 nm (a) and polarized absorption and emission spectra from1440 to 1680 nm (b) of the Er:Yb:LPS crystal.
Fig. 3 RT fluorescence decay curves of Yb3+ ions in the Er:Yb:LPS crystal (a) and Yb:LPS polycrystalline powder (b). RT fluorescence decay curves of Er3+ in the Er:Yb:LPS (c) and Er:LPS (d) crystals.
Fig. 4 Low temperature unpolarized fluorescence spectra of the Er:Yb:LPS crystal when the sample was excited with a diode laser at 976 nm (a). Stark splittings of the 4I15/2 and 4I13/2 multiplets in the Er:Yb:LPS crystal (b).
Fig. 5 Input-output characteristics of the CW diode-pumped Er:Yb:LPS laser. Output laser spectra at absorbed pump power of 3.80 W are also shown (a). Gain curves of the 4I13/2→4I15/2 transition of Er3+ ions in the Er:Yb:LPS crystal for E//Y and E//Z when values of β are 0.4 and 0.5 (b).

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