[1] [1] P A Loiko, V V Filippov, K V Yumashev. Thermo-optic coefficients study in KGd(WO4)2 and KY(WO4)2 by a modified minimum deviation method[J]. Applied Optics, 2012, 51(15): 2951-2957.

[2] [2] P A Loiko, K V Yumashev, N V Kuleshov, et al.. Thermal lensing study and athermal directions in flashlamp-pumped Nd∶KGd (WO4)2 laser crystal[J]. Appl Phys B, 2012, 106(4): 881-886.

[3] [3] P A Loiko, K V Yumashev, N V Kuleshov, et a1.. Thermo-optic dispersion formulas for monoclinic double tungstates KRe(WO4)2 where Re=Gd, Y, Lu, Yb[J]. Optical Materials, 2011, 33(11): 1688-1694.

[4] [4] P A Loiko, K V Yumashev, N V Kuleshov, et al.. Detailed characterization of thermal expansion tensor in monoclinic KRe(WO4)2 (where Re=Gd, Y, Lu, Yb)[J]. Optical Materials, 2011, 34(1): 23-26.

[5] [5] D Stuc inskas , R Antipenkov, A Varanavicius. Thermal lensing in high-power diode-pumped Yb∶KGW laser[J]. Lithuanian Journal of Physics, 2010, 50(2): 191-199.

[6] [6] Xiao Hu, Zhang Hanwei, Wang Xiaolin, et al.. Study on Ytterbium-doped fiber lasers of special wavelength[J]. Chinese J Lasers, 2013, 40(9): 0902008.

[7] [7] Sun Ruoyu, Jin Dongchen, Cao Yi, et al.. Hundred-watt-level 1030 nm ytterbium-doped picosecond all-fiber lasersun ruoyu[J]. Chinese J Lasers, 2014, 41(10): 1002004.

[8] [8] Lian Fuqiang, Yu Jin, Niu Gang, et al.. Ultrafast all-polarization maintaining Yb-doped fiber laser[J]. Chinese J Lasers, 2013, 40(s1): s102002.

[9] [9] G Paunescu, J Hein, R Sauerbrey. 100-fs diode-pumped Yb∶KGW mode-locked laser[J]. Applied Physics B, 2004, 79(5): 555-558.

[10] [10] Julius Vengelis, Ignas Stuc inskas , Karolina Stankevic iūtè, et al.. Characteristics of optical parametric oscillators synchronously pumped by second harmonic of femtosecond Yb∶KGW laser[J]. Optics Communications, 2014, 338: 277-287.

[11] [11] Major Arkady, Barzda Virginijus, Piunno Paul A E, et al.. An extended cavity diode-pumped femtosecond Yb:KGW laser for applications in optical DNA sensor technology based on fluorescence lifetime measurements[J]. Optics Express, 2006, 14(12): 5285-5294.

[12] [12] J E Hellstr m, S Bjurshagen, V Pasiskevicius, et al.. Efficient Yb∶KGW lasers end-pumped by high-power diode bars[J]. Applied Physics B, 2006, 83(2): 235-239.

[13] [13] Steven R Bowman. Lasers without internal heat generation[J]. IEEE Journal of Quantum Electronics, 1999, 35(1): 115-122.

[14] [14] Steven R Bowman, Neil W Jenkins, Shawn P O′ Connor, et al.. Sensitivity and stability of a radiation-balanced laser system[J]. IEEE Journal of Quantum Electronics, 2002, 38(10): 1339-1348.

[15] [15] Steven R Bowman, Shawn P O′ Connor, Subrat Biswal, et al.. Minimizing heat generation in solid-state lasers[J]. IEEE Journal of Quantum Electronics, 2010, 46(7): 1076-1085.

[16] [16] Galina Nemova, Raman Kashyap. Thin-disk athermal laser system[J]. Optics Communications, 2014, 319: 100-105.

[17] [17] Sébastien Chenais, Francois Balembois, Frédéric Druon, et al.. Thermal lensing in diode-pumped ytterbium lasers—part ii: Evaluation of quantum efficiencies and thermo-optic coefficients[J]. IEEE Journal of Quantum Electronics, 2004, 40(9): 1235-1243.

[18] [18] Sébastien Chenais, Francois Balembois, Frédéric Druon, et al.. Thermal lensing in diode-pumped ytterbium lasers—Part I: Theoretical analysis and wavefront measurements[J]. IEEE Journal of Quantum Electronics, 2004, 40(9): 1217-1234.

[19] [19] M C Pujol, X Mateos, R Solé, et al.. Linear thermal expansion tensor in KRE(WO4)2 (RE=Gd, Y, Er, Yb) monoclinic crystals[J]. Materials Science Forum, 2001, 378-381: 710-717.

[20] [20] Subrat Biswal, Shawn P O′ Connor, Steven R Bowman. Thermo-optical parameters measured in ytterbium-doped potassium gadolinium tungstate[J]. Appl Opt, 2005, 44(15): 3093-3097.

[21] [21] J E Hellstr m, S Bjurshagen, V Pasiskevicius. Laser performance and thermal lensing in high-power diode-pumped Yb∶KGW with athermal orientation[J]. Appl Phys B, 2006, 83(1): 55-59.

[22] [22] Zhou Mu, Wang Xiaofeng, Tan Jichun. Calculation and analysis of athermal directions of Yb∶KGW laser crystal[J]. Journal of Applied Optics, 2008, 29(1): 0081-0085.

[23] [23] M C Pujol, R Solé, J Massons, et al.. Structural study of monoclinic KGd(WO4)2 and effects of lanthanide substitution[J]. J Appl Cryst, 2001, 34(1): 1-6.

[24] [24] Chen Gang, Liao Liji, Hao Wei. The Basis of Crystal Physics[M]. Beijing: Science Press, 2007: 635-639.

[25] [25] Zhou Mu. Radiation Balanced Laser′s Theory and Yb∶KGW Fluorescence Cooling Laser′s Design[D]. Changsha: National University of Defense Technology, 2009: 42-48.

[26] [26] V V Filippov. Athermal directions in KGd(WO4)2 and KLu(WO4)2 crystals under uniform heating[J]. Applied Optics, 2013, 52(18): 4377- 4384.