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Laser diode end-pumped Nd:YAG based multiple weak-lines laser from 4F3/2-4I13/2 translation is reported. Fluorescence spectra for both Nd:YAG crystal and ceramic are present. Simple two-mirror cavity with reasonable optical coating is used for multiple weak-line laser operation around 1.3 and 1.4 μm. The variations of laser output and spectra with the pump power are compared experimentally between 1.0 at.% Nd3+ doped Nd:YAG ceramic with 3 mm×3 mm×7.5 mm in size and 0.8 at.% Nd3+-doped Nd:YAG crystal with 3 mm×3 mm×8 mm in size. First, 1338 and 1356 nm dual-wavelength laser outputs are achieved using output coupler with transmittance values of 9.6%, 6.2%, 2.4% and 1.8% at 1338, 1356, 1414 and 1444 nm, respectively. Under low pump power around the threshold, the 1356 nm single wavelength laser is obtained. With increasing the pump power, the laser with a wavelength of 1338 nm appears first in the ceramic. At an incident pump power of 11.8 W, a 1338 and 1356 nm dual-wavelength laser with an output power of 3.7 W and an intensity ratio of 1 : 5 for crystal, and a 1338 and 1356 nm dual-wavelength laser with an output power of 3.5 W and an intensity ratio of 1:3 for ceramic are obtained. Replacing the output couplers with transmittance values of 15.4%, 6.5%, 1.1% and 0.8% at wavelengths of 1338, 1356, 1414 and 1444 nm, respectively, 1356 and 1414 nm dual-wavelength laser outputs are achieved. Under the low pump power, even triple-wavelength (1356, 1414 and 1444 nm) laser is obtained. With increasing the pump power, the intensities of 1414 and 1444 nm wavelengths turned down and the 1444 nm wavelength disappears first in ceramic. At an incident pump power of 11.8 W, a 1356 and 1414 nm dual-wavelength output power of 3.56 W with intensity ratio of 44 : 1 for crystal and a 1356 and 1414 nm dual-wavelength laser output power of 3.25 W with intensity ratio of 12 : 1 for ceramic are obtained. The results show that slight difference between fluorescence spectra results from the difference in laser spectrum between transparent ceramic and single crystal materials for multi-wavelength output. Thresholds of two different output couplers are both about 2 W. When the incident pump power increases to 13.5 W, a 1338 and 1356 nm dual-wavelength laser output power of 4.05 W and a 1356 and 1414 nm dual-wavelength laser output power of 3.65 W are achieved in Nd:YAG transparent ceramic. The corresponding slope efficiency values are 33.9% and 31.9%, respectively.
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Keywords:
- Nd:YAG /
- transparent ceramics /
- 1.3 μm waveband /
- multi-wavelengths
[1] Koechner W (translated by Sun W, Jiang Z W, Cheng G X) 2002 Solid-State Laser Engineering (Beijing: Science Press) p45 (in Chinese) [克希耐尔W 著 (孙文, 江泽文, 程国祥 译) 2002 固体激光工程(北京: 科学出版社)第45页]
[2] Rolle A, Pereszlenyi A, Koch R, Richard M, Baier B 2006 J. Thorac. Cardiovasc. Surg. 131 1236
[3] Fan P Z 2000 Laser 37 1 (in Chinese) [范品忠 2000 激光与光电子学进展 37 1]
[4] Whitley T J 1995 J. Lightwave Technol. 13 1744
[5] Zhang G, Zhu H Y, Huang C H, Chen J, Wei Y, Huang L X 2009 Opt. Lett. 34 1495
[6] Li P, Chen X H, Wang Q P, Zhang X Y 2010 Acta Opt. Sin. 30 2963 (in Chinese) [李平, 陈晓寒, 王青圃, 张行愚2010 光学学报 30 2963]
[7] Zhu H Y, Zhang G, Huang C H, Wei Y, Huang L X, Li A H, Chen Z Q 2008 Appl. Phys. B 90 451
[8] Singh S, Smith R G, van Vitert L G 1974 Phys. Rev. B 10 2566
[9] Fan Y X, Hou Y E, Liu Y, Xu Q, Wang H T, He J L 2007 Appl. Phys. B 86 443
[10] Li C L, Zhang X H, Liang W, Jin G Y 2011 Laser Phys. 21 1017
[11] Chen J Y, Duan Y M, Pan X G, Feng Z R, Zhu H Y 2013 Chin. J. Lasers 40 0602020 (in Chinese) [陈久益, 段延敏, 潘小歌, 凤正荣, 朱海永2013 中国激光 40 0602020]
[12] Ye Y L, Zhu H Y, Duan Y M, Shao Z H, Luo D W, Zhang J, Tang D Y, Kaminskii A A 2015 Opt. Mater. Express 5 611
[13] Lan R J, Yang G, Wang Z P 2015 Chin. Phys. B 24 064210
[14] Pan X G, Zhu H Y, Duan Y M, Chen J Y, Zhang Y J, Zhang J, Tang D Y 2013 J. Russ. Laser Res. 34 458
[15] Li W, Chen C S, Wei J X, Han T, Liu S H 2014 Acta Phys. Sin. 63 087801 (in Chinese) [李威, 陈长水, 韦俊雄, 韩田, 刘颂豪 2014 63 087801]
[16] Zhan M J, Zhou Y W, Lin Q F, Wang Z H, Han H N, L L, Wei Z Y, Zhang J, Tang D Y 2014 Acta Phys. Sin. 63 014205 (in Chinese) [詹敏杰, 邹育婉, 林清峰, 王兆华, 韩海年, 吕亮, 魏志义, 章建, 唐定远 2014 63 014205]
[17] Duan Y M, Zhu H Y, Xu C W, Yang H, Luo D W, Lin H, Zhang J, Tang D Y 2013 Appl. Phys. Express 6 012701
[18] Zhu H Y, Duan Y M, Xu C W, Yang H, Luo D W, Lin H, Zhang J, Tang D Y 2013 Appl. Phys. Express 6 022705
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[1] Koechner W (translated by Sun W, Jiang Z W, Cheng G X) 2002 Solid-State Laser Engineering (Beijing: Science Press) p45 (in Chinese) [克希耐尔W 著 (孙文, 江泽文, 程国祥 译) 2002 固体激光工程(北京: 科学出版社)第45页]
[2] Rolle A, Pereszlenyi A, Koch R, Richard M, Baier B 2006 J. Thorac. Cardiovasc. Surg. 131 1236
[3] Fan P Z 2000 Laser 37 1 (in Chinese) [范品忠 2000 激光与光电子学进展 37 1]
[4] Whitley T J 1995 J. Lightwave Technol. 13 1744
[5] Zhang G, Zhu H Y, Huang C H, Chen J, Wei Y, Huang L X 2009 Opt. Lett. 34 1495
[6] Li P, Chen X H, Wang Q P, Zhang X Y 2010 Acta Opt. Sin. 30 2963 (in Chinese) [李平, 陈晓寒, 王青圃, 张行愚2010 光学学报 30 2963]
[7] Zhu H Y, Zhang G, Huang C H, Wei Y, Huang L X, Li A H, Chen Z Q 2008 Appl. Phys. B 90 451
[8] Singh S, Smith R G, van Vitert L G 1974 Phys. Rev. B 10 2566
[9] Fan Y X, Hou Y E, Liu Y, Xu Q, Wang H T, He J L 2007 Appl. Phys. B 86 443
[10] Li C L, Zhang X H, Liang W, Jin G Y 2011 Laser Phys. 21 1017
[11] Chen J Y, Duan Y M, Pan X G, Feng Z R, Zhu H Y 2013 Chin. J. Lasers 40 0602020 (in Chinese) [陈久益, 段延敏, 潘小歌, 凤正荣, 朱海永2013 中国激光 40 0602020]
[12] Ye Y L, Zhu H Y, Duan Y M, Shao Z H, Luo D W, Zhang J, Tang D Y, Kaminskii A A 2015 Opt. Mater. Express 5 611
[13] Lan R J, Yang G, Wang Z P 2015 Chin. Phys. B 24 064210
[14] Pan X G, Zhu H Y, Duan Y M, Chen J Y, Zhang Y J, Zhang J, Tang D Y 2013 J. Russ. Laser Res. 34 458
[15] Li W, Chen C S, Wei J X, Han T, Liu S H 2014 Acta Phys. Sin. 63 087801 (in Chinese) [李威, 陈长水, 韦俊雄, 韩田, 刘颂豪 2014 63 087801]
[16] Zhan M J, Zhou Y W, Lin Q F, Wang Z H, Han H N, L L, Wei Z Y, Zhang J, Tang D Y 2014 Acta Phys. Sin. 63 014205 (in Chinese) [詹敏杰, 邹育婉, 林清峰, 王兆华, 韩海年, 吕亮, 魏志义, 章建, 唐定远 2014 63 014205]
[17] Duan Y M, Zhu H Y, Xu C W, Yang H, Luo D W, Lin H, Zhang J, Tang D Y 2013 Appl. Phys. Express 6 012701
[18] Zhu H Y, Duan Y M, Xu C W, Yang H, Luo D W, Lin H, Zhang J, Tang D Y 2013 Appl. Phys. Express 6 022705
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