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In recent years, the direct-liquid-cooled thin-disk lasers have become ahot research topic due to their advantages of extremely small volume to output power ratio and strong thermal management ability. A method of analyzing the wavefront aberration of the direct-liquid-cooled thin-disk laser is established in this paper. The influence of pumping light uniformity on the wavefront aberration is investigated by this method. The high order aberration distribution of the laser beam is calculated, when the uniformity is 92%, 80% and 70%, respectively. With the decrease of beam uniformity, the higher order aberrationsincrease gradually, while the low order aberrations remain basically unchanged. Experimentally, the pumping beam distributions respectively with uniformity of 92% and 70% are designed with and without using the waveguide structure. The wavefront jitter and wavefront aberration distribution of the whole gain module are measured in these two cases. The pump power is kept at 5 kW. The higher order of optical path difference (OPDH) values of the whole gain module are measured to be 0.66 μm and 0.79 μm, respectively. The experimental results are in agreement with the theoretical analyses.
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Keywords:
- laser /
- direct-liquid-cooled /
- wavefront aberration
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图 2 半块薄片和液体层(图1(c)中)的温度分布
Figure 2. The temperature distribution in half of the disk and liquid layer (model in Fig. 1 (c)).
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[1] Perry M D, Banks P S, Zweiback J, Zweiback J, Schleicher Jr R W US Patent 6937629 [2005-8-30]
[2] https://en.jinzhao.wiki/wiki/High_Energy_Liquid_Laser_Area_Defense_System [2021-9-1]
[3] Fu X, Liu Q, Li P, Huang L, Gong M 2015 Opt. Express 23 18458
Google Scholar
[4] Fu X, Liu Q, Li P, Gong M 2013 Appl. Phys. B 111 517
[5] Fu X, Li P, Liu Q, Gong M 2014 Opt. Express 22 18421
Google Scholar
[6] Ye Z, Liu C, Tu B, Wang K, Gao Q, Tang C, Cai Z 2016 Opt. Express 24 1758
Google Scholar
[7] Li P, Fu X, Liu Q, Gong M 2013 J. Opt. Soc. Am. B 30 2161
Google Scholar
[8] Fu X, Liu Q, Li P, Gong M 2013 J. Optics 15 055704
Google Scholar
[9] Li P, Fu X, Liu Q, Gong M 2015 Appl. Phys. B 119 371
[10] Velghe S, Primot J, Guérineau N, Cohen M, Wattellier B 2005 Opt. Lett. 30 245
Google Scholar
[11] Zou J P, Sautivet A M, Fils J, Martin L, Abdeli K, Sauteret C, Wattellier B 2008 Appl. Opt. 47 704
Google Scholar
[12] Ren Z, Liang X, Yu L, Lu X, Leng Y, Li R, Xu Z 2011 Chin. Phys. Lett. 28 024201
Google Scholar
[13] Wang J R, Min J C, Song Y Z 2006 Appl. Therm. Eng. 26 549
Google Scholar
[14] Illés B, Harsányi G 2009 Appl. Therm. Eng. 29 2166
Google Scholar
[15] Beni S B, Bahrami A, Salimpour M R 2017 Int. J. Heat Mass Transfer 112 689
Google Scholar
[16] Min J, Wang J, Song Y 2007 Heat Transfer Eng. 28 931
Google Scholar
[17] Li P, Liu Q, Fu X, Gong M 2013 Chin. Opt. Lett. 11 041408
Google Scholar
[18] Flath L M, An J R, Brase J M, Hurd R L, Kartz M W, Sawvel R M, Silva D A 2000 Internation. Soc. Optics Photon. 4118 119
[19] Anafi D, Spinhirne J M, Freeman R H, Oughstun K E 1981 Appl. Opt. 20 1926
Google Scholar
[20] Spinhirne J M, Anafi D, Freeman R H 1982 Appl. Opt. 21 3969
Google Scholar
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