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High-performance lasers with high-quality beam laser and high-stability power are widely used for laser machining, laser precision measuring, etc. Reflection curved mirrors are widely used in lasers to provide several small intracavity focal spots and reduce the dispersion and volume of the laser. The primary disadvantage of using reflection curved mirrors in folded resonators is that relatively large angles of incidence deform the circular transverse pattern of the output beam and limit laser performance. In addition, in high power lasers or ultra short pulse lasers, the gain medium thermal lens focal length fluctuation is the primary cause of the instability of laser output power. This paper focuses on beam quality and power stability of laser, and an effective method of solving the two problems, i.e., astigmatism and instability power of laser, is presented. The laser resonator with high-quality laser beam and high-stability power is very easy and intuitive to design by this method, in which the resonator transform circle graphic theory is used and the thermal lens and astigmatism compensation is taken into account. The theoretical investigation shows that the astigmatism in two terminal arms of the folded laser resonator can be successfully eliminated by using this method, and the experimental measurements of the pattern of the laser output beam show that the deformations of spot intensity profiles in the two terminal arms can be simultaneously compensated for completely in the cavity, which is in good agreement with the analytical prediction. When the focal length of the laser crystal thermal lens varies, the variations of radii of spots not only at some key position, but also at all locations of the laser resonance designed by this method, are overtly smaller than the variation of the normal resonant cavity. The stability of the output laser power of the laser is better than that of a universal laser resonator under the same external conditions.
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Keywords:
- high beam quality /
- high stability power /
- resonator design
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[2] Xia H, Wang J, Tian Y, Chen Q D, Du X B, Zhang Y L, He Y, Sun H B 2010 Adv. Mater. 22 3204
[3] Wen Q, Sun L Q, Zhang E Y, Tian Q 2009 Mod. Phys. Lett. B 23 2585
[4] Wen Q, Sun L Q, Tian Q, Zhang E Y 2010 J. Opt. 12 015207
[5] Zhang X Y, Zhao S Z, Wang Q P, Zhang Q D, Ozygus B, Weber H 2000 Chin. J. Laser 27 777 (in Chinese) [张行愚, 赵圣之, 王青圃, 张其第, Ozygus B, Weber H 2000 中国激光 27 777]
[6] Wang Q Y 2011 M.S. Dissertation (Xi'an: Xidian University) (in Chinese) [王起阳 2011 硕士学位论文(西安: 西安电子科技大学)]
[7] Skettrup T, Meelby T, Faerch K, Frederiksen S L, Pedersen C 2000 Appl. Opt. 39 24
[8] Skettrup T 2005 J. Opt. A: Pure Appl. Opt. 7 645
[9] Wen Q, Liang G W, Zhang X J, Liang Z S, Wang Y G, Li J, Niu H B 2014 IEEE Photon. J. 6 15022136
[10] Kogelnik H, Ippen E P, Dienes A, Shank C V 1972 IEEE J. Quantum Electron. 8 373
[11] Kane D 1989 Opt. Commun. 71 113
[12] Jamasbi N, Diels J C, Sarger L 1988 J. Mod. Opt. 35 1891
[13] Zhang X J, Yang F, Wang Y G, Sun L Q, Wen Q, Niu H B 2013 Acta Phys. Sin. 62 024211 (in Chinese) [张小军, 杨富, 王勇刚, 孙利群, 文侨, 牛憨笨 2013 62 024211]
[14] Yefet S, Jouravsky V, Pe’er A 2013 J. Opt. Soc. Am. B 30 549
[15] Wen Q, Zhang X J, Wang Y G, Sun L Q, Niu H B 2014 Opt. Express 22 2309
[16] Narro R, Arronte M, Posada E D, Ponce L, Rodríguez E 2009 Proc. SPIE. 7499
[17] Zhang G Y 1977 Laser J. 4 44 (in Chinese) [张光寅 1977 激光 4 44]
[18] Zhang G Y 1981 Laser J. 8 11 (in Chinese) [张光寅 1981 激光 8 11]
[19] Geng A C, Zhao C, Bo Y, Lu Y F, Xu Z Y 2008 Acta Phys. Sin. 57 6987 (in Chinese) [耿爱丛, 赵慈, 薄勇, 鲁远甫, 许祖彦 2008 57 6987]
[20] Liu J J, Ding S H, Ding Z, Jia H X 2015 Ele-Optic Technol. Appl. 30 25 (in Chinese) [刘佳佳, 丁双红, 丁泽, 贾海旭 2015 光电技术应用 30 25]
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[1] Wu D, Chen Q D, Niu L G, Wang J N, Wang J, Wang R, Xia H, Sun H B 2009 Lab. Chip. 9 2391
[2] Xia H, Wang J, Tian Y, Chen Q D, Du X B, Zhang Y L, He Y, Sun H B 2010 Adv. Mater. 22 3204
[3] Wen Q, Sun L Q, Zhang E Y, Tian Q 2009 Mod. Phys. Lett. B 23 2585
[4] Wen Q, Sun L Q, Tian Q, Zhang E Y 2010 J. Opt. 12 015207
[5] Zhang X Y, Zhao S Z, Wang Q P, Zhang Q D, Ozygus B, Weber H 2000 Chin. J. Laser 27 777 (in Chinese) [张行愚, 赵圣之, 王青圃, 张其第, Ozygus B, Weber H 2000 中国激光 27 777]
[6] Wang Q Y 2011 M.S. Dissertation (Xi'an: Xidian University) (in Chinese) [王起阳 2011 硕士学位论文(西安: 西安电子科技大学)]
[7] Skettrup T, Meelby T, Faerch K, Frederiksen S L, Pedersen C 2000 Appl. Opt. 39 24
[8] Skettrup T 2005 J. Opt. A: Pure Appl. Opt. 7 645
[9] Wen Q, Liang G W, Zhang X J, Liang Z S, Wang Y G, Li J, Niu H B 2014 IEEE Photon. J. 6 15022136
[10] Kogelnik H, Ippen E P, Dienes A, Shank C V 1972 IEEE J. Quantum Electron. 8 373
[11] Kane D 1989 Opt. Commun. 71 113
[12] Jamasbi N, Diels J C, Sarger L 1988 J. Mod. Opt. 35 1891
[13] Zhang X J, Yang F, Wang Y G, Sun L Q, Wen Q, Niu H B 2013 Acta Phys. Sin. 62 024211 (in Chinese) [张小军, 杨富, 王勇刚, 孙利群, 文侨, 牛憨笨 2013 62 024211]
[14] Yefet S, Jouravsky V, Pe’er A 2013 J. Opt. Soc. Am. B 30 549
[15] Wen Q, Zhang X J, Wang Y G, Sun L Q, Niu H B 2014 Opt. Express 22 2309
[16] Narro R, Arronte M, Posada E D, Ponce L, Rodríguez E 2009 Proc. SPIE. 7499
[17] Zhang G Y 1977 Laser J. 4 44 (in Chinese) [张光寅 1977 激光 4 44]
[18] Zhang G Y 1981 Laser J. 8 11 (in Chinese) [张光寅 1981 激光 8 11]
[19] Geng A C, Zhao C, Bo Y, Lu Y F, Xu Z Y 2008 Acta Phys. Sin. 57 6987 (in Chinese) [耿爱丛, 赵慈, 薄勇, 鲁远甫, 许祖彦 2008 57 6987]
[20] Liu J J, Ding S H, Ding Z, Jia H X 2015 Ele-Optic Technol. Appl. 30 25 (in Chinese) [刘佳佳, 丁双红, 丁泽, 贾海旭 2015 光电技术应用 30 25]
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