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Advanced Photonics Nexus, Volume. 4, Issue 3, 036003(2025)

Space–time singularity dynamics for second harmonic spatiotemporal optical vortices

Xuechen Gao1, Wenbin Chen1, Yuchong Guo1, Jintao Fan1、*, Wei Chen2、*, Yanqing Lu2, and Minglie Hu1、*
Author Affiliations
  • 1Tianjin University, School of Precision Instruments and Opto-Electronics Engineering, Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, Ultrafast Laser Laboratory, Tianjin, China
  • 2Nanjing University, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulation, National Laboratory of Solid State Microstructures, Nanjing, China
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    (a) Calculated and (b) approximate distributions of SH STOVs caused by different α. (a) Calculation. (b) Simpson type integral.

    Fig. 1. (a) Calculated and (b) approximate distributions of SH STOVs caused by different α. (a) Calculation. (b) Simpson type integral.

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    (a) Degrees of singularity splitting of SH STOVs by approximate and calculated results. (b) Zoomed-in view of panel (a) with α ranging from 0 to 0.25.

    Fig. 2. (a) Degrees of singularity splitting of SH STOVs by approximate and calculated results. (b) Zoomed-in view of panel (a) with α ranging from 0 to 0.25.

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    Intensity and phase distributions of SH STOVs with different f(α). The value of f(α) with a range from 0 to 0.5 depends on the NTWO with a range from 0 to infinity.

    Fig. 3. Intensity and phase distributions of SH STOVs with different f(α). The value of f(α) with a range from 0 to 0.5 depends on the NTWO with a range from 0 to infinity.

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    Intensity and phase distributions of fundamental STOVs with different spatial shifted phases.

    Fig. 4. Intensity and phase distributions of fundamental STOVs with different spatial shifted phases.

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    (a) Intensity and phase distributions of SH STOVs with different spatial shifted phases. (b) Rotation of singularity with different spatial shifted phases. (c) Distances of singularity with different spatial shifted phases.

    Fig. 5. (a) Intensity and phase distributions of SH STOVs with different spatial shifted phases. (b) Rotation of singularity with different spatial shifted phases. (c) Distances of singularity with different spatial shifted phases.

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    Intensity and phase distributions of SH STOVs with different f(α) at different propagation positions.

    Fig. 6. Intensity and phase distributions of SH STOVs with different f(α) at different propagation positions.

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    Xuechen Gao, Wenbin Chen, Yuchong Guo, Jintao Fan, Wei Chen, Yanqing Lu, Minglie Hu, "Space–time singularity dynamics for second harmonic spatiotemporal optical vortices," Adv. Photon. Nexus 4, 036003 (2025)

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    Paper Information

    Category: Research Articles

    Received: Dec. 6, 2024

    Accepted: Mar. 14, 2025

    Published Online: Apr. 10, 2025

    The Author Email: Jintao Fan (fanjintao@tju.edu.cn), Wei Chen (wchen@nju.edu.cn), Minglie Hu (huminglie@tju.edu.cn)

    DOI:10.1117/1.APN.4.3.036003

    CSTR:32397.14.1.APN.4.3.036003

    Topics

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