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Chin. Phys. B, 2018, Vol. 27(7): 074211    DOI: 10.1088/1674-1056/27/7/074211
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Linear polarization output performance of Nd: YAG laser at 946 nm considering the energy-transfer upconversion

Jin-Xia Feng(冯晋霞)1,2, Yuan-Ji Li(李渊骥)1,2, Kuan-Shou Zhang(张宽收)1,2
1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
2 Collaborative Innovation Centre of Extreme Optics, Shanxi University, Taiyuan 030006, China
Abstract  A theoretical model of quasi-three-level laser system is developed, in which both the thermally induced depolarization loss and the effect of energy-transfer upconversion are taken into account. Based on the theoretical investigation of the influences of output transmission and incident pump power on thermally induced depolarization loss, the output performance of 946 nm linearly polarized Nd:YAG laser is experimentally studied. By optimizing the transmission of output coupler, a 946 nm linearly polarized continuous-wave single-transverse-mode laser with an output power of 4.2 W and an optical-optical conversion efficiency of 16.8% is obtained, and the measured beam quality factors are Mx2=1.13 and My2=1.21. The theoretical prediction is in good agreement with the experimental result.
Keywords:  946 nm laser      linear polarization      thermally induced depolarization losses      energy-transfer upconversion  
Received:  02 February 2018      Revised:  05 March 2018      Accepted manuscript online: 
PACS:  42.55.Xi (Diode-pumped lasers)  
  68.60.Dv (Thermal stability; thermal effects)  
  77.22.Ej (Polarization and depolarization)  
Fund: Project supported by the National Key R&D Program of China (Grant No. 2016YFA0301401) and the Fund for Shanxi ''331 Project'' Key Subjects Construction, China (Grant No. 1331KS).
Corresponding Authors:  Kuan-Shou Zhang     E-mail:  kuanshou@sxu.edu.cn

Cite this article: 

Jin-Xia Feng(冯晋霞), Yuan-Ji Li(李渊骥), Kuan-Shou Zhang(张宽收) Linear polarization output performance of Nd: YAG laser at 946 nm considering the energy-transfer upconversion 2018 Chin. Phys. B 27 074211

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