Abstract：A novel scheme of fully immersing water cooling is proposed for a Nd:glass radial slab laser. The slab medium is entirely immersed in the circulating water filling the pumping cavity, which enables much lower temperature and reasonably smaller thermal gradient in the slab medium. The radial slab is symmetrically and synchronously pumped by eight flash lamps, and produces multi-output beams with a total energy of 469 mJ. Incoherent beam combination property of the multi-output beams is also investigated. The approach suggested here provides a way of scaling the slab lasers to much higher output levels and also a convenience for beam combinations.
[1] Goodno G D, Komine H, McNaught S J, Weiss S B, Redmond S, Long W, Simpson R, Cheung E C, Howland D, Epp P, Weber M, McClellan M, Sollee J and Injeyan H 2006 Opt. Lett.31 1247 [2] Qi Y F, Zhu X L, Lou Q H, Ji J H, Dong J X and Wei Y R 2005 Opt. Express13 8725 [3] Mao Y F, Zhang H L, Xu L, Deng B, Xing J C, Xin J G and Jiang Y 2014 Chin. Phys. Lett.31 074206 [4] Kane T J, Eckardt R C and Byer R L 1983 IEEE J. Quantum Electron.19 1351 [5] Cui L, Zhang H L, Xu L, Li J, Yan Y, Duan C, Sha P F and Xin J G 2010 Chin. Phys. Lett.27 114204 [6] Du K M, Wu N L, Xu J D, Giesekus J, Loosen P and Poprawe R 1998 Opt. Lett.23 370 [7] Guo M X, Li J D, Fu W Q, Shi X C, Hu Q Q and Chen W B 2006 Chin. Phys. Lett.23 2530 [8] Fu X, Li P L, Liu Q and Gong M L 2014 Opt. Express22 18421 [9] Injeyan H and Goodno G D 2011 High Power Laser Handbook (New York: McGraw-Hill Professional) p 187 [10] Sridharan A K, Saraf S, Sinha S and Byer R L 2006 Appl. Opt.45 3340 [11] McNaught S J, Komine H, Weiss S B, Simpson R, Johnson A M, Machan J, Asman C P, Weber M, Jones G C, Valley M M, Jankevics M, Burchman D, McClellan M, Sollee J, Marmo J and Injeyan H 2009 Conf. Lasers Electro-Opt. CLEO (Baltimore, USA June 4 2009) p CThA1 [12] Li X, Xiao H, Dong X L, Ma Y X and Xu X J 2011 Chin. Phys. Lett.28 094210 [13] Tian Z S, Cheng H L, Xu P, Zhang X B and Fu S Y 2013 Chin. Opt. Lett.11 0414041
2015, Vol. 32 
