Thermal effect of LD end-pumped Nd：GGG laser

FENG Zhu; WAN Yunfang

doi:10.7510/jgjs.issn.1001-3806.2014.03.016

In order to study the thermal effect of LD end-pumped Nd:GGG laser, the thermal focal length, intrinsic loss and thermal loss were measured with the laser operating continuously. The results show the maximal output power of 13.2W, the maximal slope efficiency of 51.5% and the optical conversion efficiency of 49.5% were obtained in a plano-concave cavity when the pump power was 28.8W. The intrinsic loss of Nd:GGG crystal was 0.86%/cm. The result was in good agreement with the theoretically calculation. The results can offer experimental and theoretical basis for the further optimizaiton of LD pumped Nd:GGG laser.

Thermal effect of LD end-pumped Nd：GGG laser

1. School of Life Sciences, Shandong University of Technology, Zibo 255049, China;

2. School of Science, Shandong University of Technology, Zibo 255049, China

Received Date: 2013-09-13

Accepted Date: 2013-09-24

Available Online: 2014-05-25

Abstract: In order to study the thermal effect of LD end-pumped Nd:GGG laser, the thermal focal length, intrinsic loss and thermal loss were measured with the laser operating continuously. The results show the maximal output power of 13.2W, the maximal slope efficiency of 51.5% and the optical conversion efficiency of 49.5% were obtained in a plano-concave cavity when the pump power was 28.8W. The intrinsic loss of Nd:GGG crystal was 0.86%/cm. The result was in good agreement with the theoretically calculation. The results can offer experimental and theoretical basis for the further optimizaiton of LD pumped Nd:GGG laser.

HTML

Reference (20)

[1]	GEUSIC J, MARCOS H, van UITERT L. Laser oscillations in Nd-doped yttrium aluminum, yttrium gallium and gadolinium garnets[J]. Applied Physics Letters,1964,4(10):182-184.
[2]	YOSHIDA K, YOSHIDA H, KATO Y. Characterization of high average power Nd： GGG slab lasers[J]. IEEE Journal of Quantum Electronics,1988,24 (6):1188-1192.
[3]	HAYAKAWA H, MAEDA K, ISHIKAWA T, et al.High average power Nd： Gd3Ga5O12 slab laser[J]. Japanese Journal of Applied Physics,1987,26 (10):L1623-L1625.
[4]	LABRANCHE B, QUN W, GALARNEAU P.Diode-pumped-CW and quasi-CW Nd： GGG (Ca, Mg, Zr) laser[J].Proceedings of SPIE,1994,2041:326-331.
[5]	QIN L, TANG D, XIE G, et al. High-power continuous wave and passively Q-switched laser operations of a Nd： GGG crystal[J]. Laser Physics Letters,2008,5(2):100.
[6]	DONG Y, ZU J, HOU L, et al. Approximate formulas of temperature and stress distributions and thermal induced effects in a heat capacity slab laser[J]. Chinese Optics Letters,2006,4(6):326-328.
[7]	MAHAJAN R, SHAH A, PAL S, et al. Analytical study for investigating the behaviour of Nd-doped glass, YAG and GGG under the heat capacity mode of operation[J]. Optics & Laser Technology,2007,39(7):1406-1412.
[8]	ZHARIKOV E V, IL'ICHEV N N, LAPTEV V, et al. Sensitization of neodymium ion luminescence by chromium ions in a Gd3Ga5O12 crystal[J]. Soviet Journal of Quantum Electronics,1982,12(3):338-341.
[9]	GERHARDT R, KLEINE-BORGER J, BEILSCHMIDT L, et al. Efficient channel-waveguide laser in Nd： GGG at 1.062μm wavelength[J]. Applied Physics Letters,1999,75(9):1210-1212.
[10]	ZHANG Y K,ZAN H P. Effect of pumping light distribution on thermal distortion of laser crystal with circular cross-section [J].Laser Technology, 2013, 37(5):647-650(in Chinese).
[11]	SHI P, XIN Y, LI L, et al. Thermal analysis of rectangular Nd：GGG heat capacity lasers[J].Laser Technology, 2011, 35(3):305-307(in Chinese).
[12]	XIN Y, SHI P, LI L, et al. Analysis of thermal effect of LD double side pumped NG：GGG heat capacity laser crystal[J].Laser Technology, 2011, 35(6):787-791(in Chinese).
[13]	FINDLAY D, CLAY R. The measurement of internal losses in 4-level lasers[J]. Physics Letters,1966,20(3):277-278.
[14]	SONG F, ZHANG C, DING X, et al. Determination of thermal focal length and pumping radius in gain medium in laser-diode-pumped Nd： YVO4 lasers[J]. Applied Physics Letters,2002,81 (12):2145-2147.
[15]	SAFARI E, KACHANOV A. Estimation of thermal lensing effect in the high-power end-pumped direct-cut crystal lasers[J]. Optics & Laser Technology,2006,38(7):534-539.
[16]	FOX A, LI T. Modes in a maser interferometer with curved and tilted mirrors[J]. Proceedings of the IEEE,1963,51(1):80-89.
[17]	SCHULZ P A, HENION S R. Liquid-nitrogen-cooled Ti： Al2O3 laser[J]. IEEE Journal of Quantum Electronics,1991,27(4):1039-1047.
[18]	BORN M, WOLF E.Principles of optics[M].Oxford,USA:Pergamon Press,1975:460-464.
[19]	CHEN Y, HUANG T, KAO C, et al. Optimization in scaling fiber-coupled laser-diode end-pumped lasers to higher power: influence of thermal effect[J].IEEE Journal of Quantum Electronics,1997,33 (8):1424-1429.
[20]	LIU J H, LU J H, LU J R, et al. Investigation of thermally induced losses in high-power laser-diode-array end-pumped Nd：YVO4 solid-state lasers[J]. Chinese Journal of Quantum Electronics, 2000, 17(1): 48-53(in Chinese).

Thermal effect of LD end-pumped Nd：GGG laser

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views