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Acta Optica Sinica, Volume. 41, Issue 21, 2126003(2021)

Misalignment Effect on Far-Field Spatio-Temporal Characteristics in Off-Axis Gregorian System

Bilong Hu1,2、*, Wei Li1,2, Xiao Wang1,2, Yanlei Zuo1,2, Jie Mu1,2, Xiaodong Wang1,2, Zhaohui Wu1,2, Zhaoli Li1,2, Xiaoming Zeng1,2, and Jingqin Su1,2
Author Affiliations
  • 1Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China
  • 2Science and Technology on Plasma Physics Laboratory, Mianyang, Sichuan 621900, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (7)
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    References (22)
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    Figures & Tables(7)
    Common reflective beam expander systems. (a) Axial symmetric Gregorian system; (b) axial symmetric Cassegrain system; (c) off-axis Gregorian system; (d) off-axis Cassegrain system

    Fig. 1. Common reflective beam expander systems. (a) Axial symmetric Gregorian system; (b) axial symmetric Cassegrain system; (c) off-axis Gregorian system; (d) off-axis Cassegrain system

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    Schematic diagram of reflective beam expansion and focusing system

    Fig. 2. Schematic diagram of reflective beam expansion and focusing system

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    Far-field spatial distribution with different misalignment of off-axis parabolic mirror. (a) Decenter in x direction; (b) decenter in y direction; (c) decenter in z direction; (d) tilt in x direction; (e) tilt in y direction

    Fig. 3. Far-field spatial distribution with different misalignment of off-axis parabolic mirror. (a) Decenter in x direction; (b) decenter in y direction; (c) decenter in z direction; (d) tilt in x direction; (e) tilt in y direction

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    Strehl ratio varying with off-axis angle

    Fig. 4. Strehl ratio varying with off-axis angle

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    Far-field temporal distribution with different misalignment of off-axis parabolic mirror. (a) Decenter in x direction; (b) decenter in y direction; (c) decenter in z direction; (d) tilt in x direction; (e) tilt in y direction

    Fig. 5. Far-field temporal distribution with different misalignment of off-axis parabolic mirror. (a) Decenter in x direction; (b) decenter in y direction; (c) decenter in z direction; (d) tilt in x direction; (e) tilt in y direction

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    Peak power varying with off-axis angle

    Fig. 6. Peak power varying with off-axis angle

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    • Table 1. Error tolerance under different conditions

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      Table 1. Error tolerance under different conditions

      MisalignmentError tolerance (Strel ratio>95%/peak power>95%)
      Case ICase IICase III
      Decenter in x direction /(μm/μm)1220/622706/341620/501
      Decenter in y direction /(μm/μm)675/480395/268348/305
      Decenter in z direction /(μm/μm)12030/745810/526390/20
      Tilt in x direction /(μrad/μrad)454/418318/216248/217
      Tilt in y direction /(μrad/μrad)1309/667939/453450/364
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    Bilong Hu, Wei Li, Xiao Wang, Yanlei Zuo, Jie Mu, Xiaodong Wang, Zhaohui Wu, Zhaoli Li, Xiaoming Zeng, Jingqin Su. Misalignment Effect on Far-Field Spatio-Temporal Characteristics in Off-Axis Gregorian System[J]. Acta Optica Sinica, 2021, 41(21): 2126003

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    Paper Information

    Category: Physical Optics

    Received: Mar. 10, 2021

    Accepted: May. 27, 2021

    Published Online: Nov. 17, 2021

    The Author Email: Hu Bilong (hbl1271@163.com)

    DOI:10.3788/AOS202141.2126003

    Topics

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