Acta Photonica Sinica, Volume. 51, Issue 11, 1106005(2022)

Research on Coupling Efficiency Based on Fiber Optic Rotary Joints

Wei SONG1...2,3, Youjin XIE1,2, Zhiguo LI1,2,*, Wei HAO1,2, Peipei YAN1,2, Xin LI1,2 and Chuandong SUN1 |Show fewer author(s)
Author Affiliations
  • 1Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Science,Xi'an 710119,China
  • 2Key Laboratory of Space Precision Measurement Technology,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Science,Xi'an 710119,China
  • 3University of Chinese Academy of Science,Beijing 100049,China
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    Figures & Tables(15)
    Coupling model of two G-lenses with Gaussian beam
    Transmission with errors in fiber optic rotary joints
    Transmission path of Gaussian beam between G-Lenses
    Separation misalignment,lateral offsets,angular tilt misalignment between two GRIN lenses
    Ray tracing in two G-Lens collimators
    Insertion loss curves at different d1 andd2
    Insertion loss curves under different errors
    Schematic of the principle of beam steering technology
    Insertion loss change diagram after optimization
    Experiment scheme
    Insertion loss of measurement and simulation with changing d1
    Insertion loss of G-Lens1 and G-Lens2 at different positions
    Insertion loss influenced by lateral offsets and separation misalignment
    • Table 1. Parameters of GRIN lens-1 and GRIN lens-2

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      Table 1. Parameters of GRIN lens-1 and GRIN lens-2

      Parameter of G-Lens
      n01.591
      Diameter1.8 mm
      A0.324
      L4.45 mm
      d5 mm
      Initial distance of d1, d20.258 mm
    • Table 2. Main optical components in beam steering technology

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      Table 2. Main optical components in beam steering technology

      ProductCharacteristicSupplier
      G-LensDiameter1.8 mmFemto technoligy
      A0.324
      Single mode fiberMode field diameter10.4 μmCORNING
      Numerical aperture0.14
      Wedge prismDiameter12.7 mmThorlabs
      Thickness3 mm
      Wedge angle30±10 arcmin
      Plat glassThickness2.5 mmThorlabs
      AR coating1 050~1 620 nm
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    Wei SONG, Youjin XIE, Zhiguo LI, Wei HAO, Peipei YAN, Xin LI, Chuandong SUN. Research on Coupling Efficiency Based on Fiber Optic Rotary Joints[J]. Acta Photonica Sinica, 2022, 51(11): 1106005

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: May. 6, 2022

    Accepted: Jun. 15, 2022

    Published Online: Dec. 13, 2022

    The Author Email: LI Zhiguo (lzg@opt.ac.cn)

    DOI:10.3788/gzxb20225111.1106005

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