Artificial-gauge-field-based inverse design for wideband-flat power splitter and microring resonator

Zhaonian Wang; Jiangbing Du; Yixuan Huang; Xi Wang; Ke Xu; Zuyuan He

doi:10.1117/1.APN.4.1.016001

Advanced Photonics Nexus, Volume. 4, Issue 1, 016001(2025)

Artificial-gauge-field-based inverse design for wideband-flat power splitter and microring resonator Editors' Pick

Zhaonian Wang¹, Jiangbing Du^1、*, Yixuan Huang¹, Xi Wang², Ke Xu², and Zuyuan He¹

¹Shanghai Jiao Tong University, State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai, China

²Harbin Institute of Technology (Shenzhen), Department of Electronic and Information Engineering, Shenzhen, China

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Figures & Tables(9)

Fig. 1. (a) Schematic of AGF. (b) Simulated light fields of straight and AGF waveguide arrays. (c) Simulated light fields of straight and AGF waveguides for different wavelengths.

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Fig. 2. Schematic of inverse design via a neural network.

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Fig. 3. Simulated light fields and transmission results of power splitters, with different splitting ratios of (a) 5%/95%, (b) 10%/90%, (c) 30%/70%, and (d) 50%/50%. (e) Total transmission of these four splitters.

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Fig. 4. (a) Microscope image of AGF-based power splitter. (b) Transmission results of the cross port of the AGF-based power splitter. (c), (d) Results of the splitting ratio.

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Fig. 5. Transmission curves of rings with (a) linearly varied coupling coefficient and (b) constant coupling coefficient.

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Fig. 6. (a) Schematic of optimized microring. (b) Microscope image of optimized microring fabrication.

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Fig. 7. Experimental results of power sweeping spectra of (a) optimized microring and (b) conventional microring. (c) ER of optimized microring varies with wavelength.

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Table 1. Ranges of structural parameters in the data set.
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Table 1. Ranges of structural parameters in the data set.
Parameter Minimum Maximum
$A$ ( $μ m$ ) 0.70 1.00
$G$ ( $μ m$ ) 0.15 0.25
$W$ ( $μ m$ ) 0.40 0.60
$P$ ( $μ m$ ) 8.00 12.00

Table 2. Structural parameters of power splitters with four different splitting ratios.
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Table 2. Structural parameters of power splitters with four different splitting ratios.
Structure Ratio $A$ ( $μ m$ ) $G$ ( $μ m$ ) $W$ ( $μ m$ ) $P$ ( $μ m$ )
A 5% to 95% 0.75 0.19 0.55 10
B 10% to 90% 0.82 0.17 0.53 10
C 30% to 70% 0.94 0.14 0.50 10
D 50% to 50% 0.86 0.25 0.40 8

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Zhaonian Wang, Jiangbing Du, Yixuan Huang, Xi Wang, Ke Xu, Zuyuan He, "Artificial-gauge-field-based inverse design for wideband-flat power splitter and microring resonator," Adv. Photon. Nexus 4, 016001 (2025)

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