[1] W. Koechner and M. K. Wilson, “Solid-state laser engineering: second completely revised and updated edition,” Applied Optics, 1989, 28(48): 509–530.

[2] A. K. Cousins, “Temperature and thermal stress scaling in finite-length end-pumped laser rods,” IEEE Journal of Quantum Electronics, 1992, 28(4): 1057–1069.

[3] S. C. Tidwell, J. F. Seamans, and M. S. Bowers, “Highly efficient 60-W TEM00 cw diode-endpumped Nd: YAG laser,” Optics Letters, 1993, 18(2): 116–118.

[4] J. E. Murray, “Pulsed gain and thermal lensing of Nd: LiYF4,” IEEE Journal of Quantum Electronics, 2003, 19(4): 488–491.

[5] C. Keileck, A. Hirth, and M. T. Schellhorn, “Performances of Ho: YAG laser intracavity-pumped by a diode-pumped TM: YLF laser,” SPIE, 2004, 5478: 488–491.

[6] C. Keileck, A. Hirth, and M. T. Schellhorn, “Performances of Ho: YAG laser intracavity-pumped by a diode-pumped TM: YLF laser,” Optics Letters, 2003, 28: 1933–1935.

[7] W. Koechner and D. K. Rice, “Effect of birefringence on the performance of linearly polarized YAG: Nd lasers,” IEEE Journal of Quantum Electronics, 1970, 6(9): 557–566.

[8] Y. J. Huang, C. Y. Tang, W. L. Lee, Y. P. Huang, S. C. Huang, and Y. F. Chen, “Efficient passively Q-switched Nd: YLF TEM00-mode laser at 1053 nm: selection of polarization with birefringence,” Applied Physics B, 2012, 108(2): 313–317.

[9] K. Schuhmann, K. Kirch, F. Nez, R. Pohl, and A. Antognini, “Thin-disk laser scaling limit due to thermal lens induced misalignment instability,” Applied Optics, 2016, 55 (22): 9022–9032.

[10] D. L. Kim and B. T. Kim, “Laser output power losses in ceramic Nd: YAG lasers due to thermal effects,” Optik International Journal for Light and Electron Optics, 2016, 127(20): 9738–9742.

[11] S. Chenais, F. Druon, F. Balembois, G. Lucas-Leclin, Y. Fichot, P. Georges, et al., “Thermal lensing measurements in diode-pumped Yb doped GdCOB, YCOB, YSO, YAG and KGW,” Optical Materials, 2003, 22(2): 129–137.

[12] S. Chenais, F. Balembois, F. Druon, G. Lucas-Leclin, and P. Georges, “Thermal lensing in diode-pumped ytterbium lasers part II: evaluation of quantum efficiencies and thermo-optic coefficients,” IEEE Journal of Quantum Electronics, 2004, 40(9): 1235–1242.

[13] P. J. Hardman, W. A. Clarkson, G. J. Friel, M. Pollnau, and D. C. Hanna, “Energy-transfer upconversion and thermal lensing in high-power end-pumped Nd: YLF laser crystals,” IEEE Journal of Quantum Electronics, 1999, 35(4): 647–655.

[14] Z. L. Zhang, Q. Liu, M. M. Nie, E. C. Ji, and M. L. Gong, “Experimental and theoretical study of the weak and asymmetrical thermal lens effect of Nd:YLF crystal for σ and π polarizations,” Applied Physics B, 2015, 120(4): 689–696.

[15] LASCAD Gmbh, Brimhildenstr. 9, 80639 Munich, Germany. Available online: http://www.las-cad. com/index.php.

[16] D. C. Brown, “Ultrahigh-average-power diodepumped Nd: YAG and Yb: YAG lasers,” IEEE Journal of Quantum Electronics, 1977, 33(5): 861–873.

[17] C. Bollig, C. Jacobs, M. J. D. Esser, E. H. Bernhardi, and H. M. von Bergmann, “Power and energy scaling of a diode-end-pumped Nd: YLF laser through gain optimization,” Optics Express, 2010, 18(13): 13993–14003.

[18] M. J. Weber, Hand book of pptical materials. New York: CRC Press London, 2002: 1–499.

[19] N. U. Wetter, E. C. Sousa, F. A. Camargo, I. M. Ranieri, and S. L. Baldochi, “Efficient and compact diode side pumped Nd: YLF laser operating at 1053 nm with high beam quality,” Journal of Optics A Pure & Applied Optics, 2008, 10(10): 1–5.

[20] M. E. Innocenzi, H. T. Yura, C. L. Fincher, and R. A. Fields, “Thermal modeling of continuous‐wave end‐pumped solid‐state lasers,” Applied Physics Letters, 1990, 56(19): 1831–1833.

[21] Y. Liu, W. Zhang, T. Xu, J. He, F. Zhang, and F. Li, “Fiber laser sensing system and its applications,” Photonic Sensors, 2011, 1(1): 43–53.

[22] M. Mayeh and F. Farahi, “Laser beam shaping and mode conversion in optical fibers,” Photonic Sensors, 2011, 1(1): 187–198.

[23] P. G. Jia, G. C. Fang, and D. H. Wang “Characterization of miniature fiber-optic Fabry-Perot interferometric sensors based on hollow silica tube,” Photonic Sensors, 2016, 6(3): 193 198.