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  • Received: Aug. 6, 2020

    Accepted: Sep. 4, 2020

    Posted: Dec. 14, 2020

    Published Online: Jan. 4, 2021

    The Author Email: Weidong Chen (

    DOI: 10.3788/COL202119.021401

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    Kaifei Tang, Wenbin Liao, Da Lin, Bingxuan Li, Weidong Chen, Ge Zhang. Self-polarization emission based on coherent combination of intracavity eigenmodes in Nd:YAG/Cr4+:YAG lasers[J]. Chinese Optics Letters, 2021, 19(2): 021401

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Chinese Optics Letters, Vol. 19, Issue 2, 021401 (2021)

Self-polarization emission based on coherent combination of intracavity eigenmodes in Nd:YAG/Cr4+:YAG lasers

Kaifei Tang1,2, Wenbin Liao2,3, Da Lin2,4, Bingxuan Li2,3, Weidong Chen2,*, and Ge Zhang2,3,5

Author Affiliations

  • 1College of Chemistry, Fuzhou University, Fuzhou 350108, China
  • 2Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
  • 3Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China
  • 4University of Chinese Academy of Sciences, Beijing 100049, China
  • 5Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Fuzhou 350108, China


The behavior of self-polarization emission in Nd:Y3Al5O12(YAG)/Cr4+:YAG lasers has been proved in some cases. However, the degree and direction of polarization were often sensitive and unstable. We experimentally observed different beam profiles versus the angle of the polarizer relative to the polarization direction of the laser. In order to explore the polarization mechanism, the dynamics of intracavity polarized eigenmodes was analyzed theoretically. Simulative results were well consistent with our experimental observations. It indicated that the linear self-polarization emission was a composite state rather than an intrinsic state. This study contributed to the improvement of the polarization stability in Nd:YAG/Cr4+:YAG passively Q-switched lasers.


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