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Growth, thermal properties and laser performance of Er,Pr:Y2.8Sc1Al4.2O12: a promising multi-wavelength laser crystal

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Abstract

Er,Pr:Y2.8Sc1Al4.2O12 (Er,Pr:YSAG) crystal has been successfully grown by the Czochralski method. The FWHM of XRC is 0.050°, indicating the high crystalline quality. Besides, thermal conductivity of the crystal is 5.76 W/mK, which is higher than lots of other heavily Er3+ doped crystals meaning the great potential in solid-laser gain media application. Luminescence characters of the crystal at 3 μm are investigated in detail to determine the laser generation potential. An intensive reduce is occurring on the fluorescence lifetimes of 4I13/2 energy level (0.75 ms) of Er3+ ions after Pr3+ ions co-doped, giving the enormous promotion on the multi-wavelength laser generation at 3 μm. Besides, the as-grown Er,Pr:YSAG crystal realizes the dual-wavelength laser generation at 2694 and 2825 nm for the first time, and an average laser power of 235 mW is realized. The M2 factor is used to quantify the laser output beam quality, which value are 1.65/1.56 along x and y axis, meaning a high-brightness laser generation of Er,Pr:YSAG crystal at 3 μm.

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Acknowledgements

Ministry of Science and Technology (MOST) (2020YFB1805800). National Natural Science Foundation of China (NSFC) (51872290, 51700232, 51902202, and 62005098).s

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Authors and Affiliations

  1. School of Material Science and Engineering, Shanghai Institute of Technology, Shanghai, 201418, People’s Republic of China

    Zhenzhen Ma, Yuanzhi Chen & Jiayue Xu

  2. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, People’s Republic of China

    Yi He, Qingli Zhang, Cong Quan, Fang Peng & Shaotang Yin

  3. Department of Optoelectronic Engineering, College of Science and Engineering, Jinan University, Guangzhou, 510632, People’s Republic of China

    Mingjie Zhang

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  1. Zhenzhen Ma
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Ma, Z., Chen, Y., He, Y. et al. Growth, thermal properties and laser performance of Er,Pr:Y2.8Sc1Al4.2O12: a promising multi-wavelength laser crystal. Appl. Phys. A 127, 517 (2021). https://doi.org/10.1007/s00339-021-04663-x

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