Journal of Infrared and Millimeter Waves, Volume. 42, Issue 1, 132(2023)

Silicon-based C-band low-loss compact polarization splitter rotator based on PSO algorithm

Zhan-Qiang HUI1...2,*, Bin LI1,2, Tian-Tian LI1,2, Dong-Dong HAN1,2, and Jia-Min GONG12 |Show fewer author(s)
Author Affiliations
  • 1Xi 'an Key Laboratory of Microwave Photon and Optical Communication,Xi’an,710121,China
  • 2School of Electronic Engineering,Xi’an University of Posts and Telecommunications,Xi’an,710121,China
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    Figures & Tables(13)
    The PSR is composed of mode converter and mode beam splitter: (a) 3D view, (b) side view
    The effective refractive index(TE0、TM0 and TE1 modes)of air-clad strip silicon waveguide versus waveguide width(central wavelength 1 550 nm)
    Flow diagram of PSO optimization
    (a)Top view of PSO optimized structure,(b)top view of structure after PSO combined with spline interpolation fitting,(c)the variation of mode conversion efficiency with device length after different iteration times and interpolation optimization
    (a)Variation of mode conversion efficiency and mode field distribution with device length under optimal parameters,(b)other mode converter related literature for comparison
    (a)Top view of PSO optimized structure,(b)the variation process of FOM with the number of iterations,the inset shows the variation process of mode coupling efficiency with the coupling length at 40 iterations
    Mode profile transmission distribution:(a)TE0 mode incident,(b)TE0 mode incident,plot of IL,CT,and PER with wavelength:(c)TE0 mode incident,(d)TM0 mode incident
    Tolerance analysis: (a) △g=+10 nm, (b) △g=-10 nm, (c) △w1=+10 nm, (d) △w1=-10 nm, (e) △w2=+10 nm, (f) △w2=-10 nm, (g) △w3=+10 nm, (h) △w3=-10 nm, (i) △w4=+10 nm, (j) △w4=-10 nm
    • Table 1. Structure parameters of TM0-TE1 mode converter optimized by PSO

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      Table 1. Structure parameters of TM0-TE1 mode converter optimized by PSO

      Geometric parametersW1A1A2A3A4A5A6A7A8W2
      Width/μm0.40.60.70.60.60.70.60.70.90.9
    • Table 2. Structure parameters of TM0-TE1 mode converter optimized by spline interpolation fitting

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      Table 2. Structure parameters of TM0-TE1 mode converter optimized by spline interpolation fitting

      Geometric parametersW1B1B2B3B4B5B6B7B8
      Width/μm0.40.60.650.680.650.60.590.60.65
      Geometric parametersB9B10B11B12B13B14B15B16W2
      Width/μm0.680.650.60.640.70.80.850.850.85
    • Table 3. Left waveguide structural parameters of mode beam splitter optimized by PSO

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      Table 3. Left waveguide structural parameters of mode beam splitter optimized by PSO

      Geometric parametersW3C1C2C3C4C5C6W4
      Width/μm0.370.450.450.320.380.420.370.45
    • Table 4. Performance comparison of mode evolution PSR

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      Table 4. Performance comparison of mode evolution PSR

      StructuresIL/dBPER/dBCT/dBLength/μmBandwidth/nmResults
      Taper+ADC25->10-7170Sim.
      Ridge+ADC27<0.5-<-50130200Sim.
      Ridge+ADC+MMI29~1.5>17-300035Exp.
      Taper+MMI30<2.5-<-12153.7100Exp.
      Ridge+Y branch31<0.4>12-95400Sim.
      Taper+Y branch32<1-<-14272100Exp.
      Taper+SWG340.5(1550 nm)-<-1915174Sim.
      Ridge+Y branch35<6>10-80035Exp.
      ADC+Ridge+Taper36<0.9-<-2062.860Exp.
      This Work<0.34>15.5<-47.14535Sim.
    • Table 5. Tolerance analysis of structural parameters

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      Table 5. Tolerance analysis of structural parameters

      Structural parametersIL/dBCT/dBPER/dB
      g±10 nm<0.52<-46>15.2
      w1±10 nm<0.35<-47.1>15.4
      w2±10 nm<1.25<-44.3>13.3
      w3±10 nm<0.34<-47.1>15.4
      w4±10 nm<0.34<-46.9>15.6
      最优参数<0.34<-47.1>15.5
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    Zhan-Qiang HUI, Bin LI, Tian-Tian LI, Dong-Dong HAN, Jia-Min GONG. Silicon-based C-band low-loss compact polarization splitter rotator based on PSO algorithm[J]. Journal of Infrared and Millimeter Waves, 2023, 42(1): 132

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    Paper Information

    Category: Research Articles

    Received: Jun. 3, 2022

    Accepted: --

    Published Online: Feb. 23, 2023

    The Author Email: Zhan-Qiang HUI (zhanqianghui@xupt.edu.cn)

    DOI:10.11972/j.issn.1001-9014.2023.01.016

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