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Chinese Journal of Lasers, Volume. 48, Issue 21, 2101005(2021)

Highly Efficient Passively Q-switched Laser Based on Yb∶YAG/YAG/Cr∶YAG/YAG Composite Crystal

Yongzhi Li1,2, Meng Zhang1,2, Dongyu Yan1,2, Guang Zhu3, Yuxi Chu1,2、*, and Minglie Hu1,2
Author Affiliations
  • 1Ultrafast Laser Laboratory, School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
  • 2Key Laboratory of Opto-Electronic Information Technology, Ministry of Education, School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
  • 3Guoke Century Laser Technology (Tianjin) Co., Ltd., Tianjin 300072, China
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    Schematic diagram of passively Q-switched laser based on Yb∶YAG/YAG/Cr∶YAG/YAG composite crystal

    Fig. 1. Schematic diagram of passively Q-switched laser based on Yb∶YAG/YAG/Cr∶YAG/YAG composite crystal

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    Average output power varying with pump power under different composite crystals. (a) Yb∶YAG/Cr∶YAG/YAG; (b) Yb∶YAG/YAG/Cr∶YAG/YAG

    Fig. 2. Average output power varying with pump power under different composite crystals. (a) Yb∶YAG/Cr∶YAG/YAG; (b) Yb∶YAG/YAG/Cr∶YAG/YAG

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    Comparison of average output power of passively Q-switched lasers based on two kinds of composite crystals under different aspheric lens groups. (a) Average output power of passively Q-switched laser based on Yb∶YAG/YAG/Cr∶YAG/YAG composite crystal at different collimation-focus ratios; (b) 1∶1 collimation-focus ratio; (c) 1∶2 collimation-focus ratio; (d) 1∶3 collimation-focus ratio

    Fig. 3. Comparison of average output power of passively Q-switched lasers based on two kinds of composite crystals under different aspheric lens groups. (a) Average output power of passively Q-switched laser based on Yb∶YAG/YAG/Cr∶YAG/YAG composite crystal at different collimation-focus ratios; (b) 1∶1 collimation-focus ratio; (c) 1∶2 collimation-focus ratio; (d) 1∶3 collimation-focus ratio

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    Relationship between output parameters and pump power of passively Q-switched lasers based on two kinds of composite crystals. (a) Repetition rate;(b) pulse width;(c) single pulse energy;(d) peak power

    Fig. 4. Relationship between output parameters and pump power of passively Q-switched lasers based on two kinds of composite crystals. (a) Repetition rate;(b) pulse width;(c) single pulse energy;(d) peak power

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    Pulse sequence and single pulse waveform of passively Q-switched laser based on different composite crystals. (a)(b) Yb∶YAG/YAG/Cr∶YAG/YAG; (c)(d) Yb∶YAG/Cr∶YAG/YAG

    Fig. 5. Pulse sequence and single pulse waveform of passively Q-switched laser based on different composite crystals. (a)(b) Yb∶YAG/YAG/Cr∶YAG/YAG; (c)(d) Yb∶YAG/Cr∶YAG/YAG

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    Output pulse spectra of passively Q-switched laser based on Yb∶YAG/YAG/Cr∶YAG/YAG and Yb∶YAG/Cr∶YAG/YAG composite crystals under different pump powers. (a) 7 W; (b) 14 W; (c) 17 W

    Fig. 6. Output pulse spectra of passively Q-switched laser based on Yb∶YAG/YAG/Cr∶YAG/YAG and Yb∶YAG/Cr∶YAG/YAG composite crystals under different pump powers. (a) 7 W; (b) 14 W; (c) 17 W

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    Relationship between beam diameter and propagation distance under different composite crystal (point is experimental data, and solid line is fitted curve), inserted figure is near-field spot. (a)Yb∶YAG/Cr∶YAG/YAG; (b) Yb∶YAG/YAG/Cr∶YAG/YAG

    Fig. 7. Relationship between beam diameter and propagation distance under different composite crystal (point is experimental data, and solid line is fitted curve), inserted figure is near-field spot. (a)Yb∶YAG/Cr∶YAG/YAG; (b) Yb∶YAG/YAG/Cr∶YAG/YAG

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    Relationship among M2, average output power, and collimation-focus ratio. (a) Relationship between M2 and average output power; (b) relationship between M2 of output laser of passively Q-switched laser based on Yb∶YAG/YAG/Cr∶YAG/YAG composite crystal and collimation-focus ratio

    Fig. 8. Relationship among M2, average output power, and collimation-focus ratio. (a) Relationship between M2 and average output power; (b) relationship between M2 of output laser of passively Q-switched laser based on Yb∶YAG/YAG/Cr∶YAG/YAG composite crystal and collimation-focus ratio

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    Yongzhi Li, Meng Zhang, Dongyu Yan, Guang Zhu, Yuxi Chu, Minglie Hu. Highly Efficient Passively Q-switched Laser Based on Yb∶YAG/YAG/Cr∶YAG/YAG Composite Crystal[J]. Chinese Journal of Lasers, 2021, 48(21): 2101005

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    Paper Information

    Category: laser devices and laser physics

    Received: Mar. 15, 2021

    Accepted: Apr. 19, 2021

    Published Online: Nov. 5, 2021

    The Author Email: Chu Yuxi (chuyuxi@tju.edu.cn)

    DOI:10.3788/CJL202148.2101005

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology