Polarization-Independent Optical Power Splitter with a Designable Splitting Ratio

Jingli Wang; Haiguang Liu; Yueteng Zhang; Yuchen Song; Hanxiao Shen; Heming Chen; Kai Zhong

doi:10.3788/LOP222232

Laser & Optoelectronics Progress, Volume. 60, Issue 17, 1723001(2023)

Polarization-Independent Optical Power Splitter with a Designable Splitting Ratio

Jingli Wang^1、*, Haiguang Liu¹, Yueteng Zhang¹, Yuchen Song¹, Hanxiao Shen¹, Heming Chen², and Kai Zhong³

¹College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, Jiangsu , China

²Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing 210023, Jiangsu , China

³Key Laboratory of Optoelectronics Information Technology (Ministry of Education), School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, Jiangsu , China

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Fig. 1. Structure diagram of the polarization-independent optical power splitter with designable splitting ratio. Inset: section view of the sandwich structure

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Fig. 2. $f_{I L}$ as functions of L

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Fig. 3. Field distribution in the sandwich structures. (a) TE polarization mode; (b) TM polarization mode

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Fig. 4. $n_{S i N_{x}}$ corresponding to TE and TM polarization modesas a function of $n_{S i N_{x}}$ , when g₁=140 nm

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Fig. 5. $n_{S i N_{x}}$ as a function of g₁ when polarization-independent condition is satisfied

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Fig. 6. Polarization-independent condition is satisfied. (a) $f_{S R}$ as a function of g₁; (b) $f_{I L}$ as a function of g₁

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Fig. 7. Field distribution of devices with different P_out1∶P_out2. (a) 50∶50, TE; (b) 50∶50, TM; (c) 40∶60, TE; (d) 40∶60, TM; (e) 30∶70, TE; (f) 30∶70, TM; (g) 20∶80, TE; (h) 20∶80, TM; (i) 10∶90, TE; (j) 10∶90, TM

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Fig. 8. $\bar{Δ f_{S R}}$ and $\bar{f_{I L}}$ as functions of W_s and L_s. (a)30:70, $\bar{Δ f_{S R}}$ ; (b) 30:70, $\bar{f_{I L}}$ ; (c) 10:90, $\bar{Δ f_{S R}}$ ; (d)10:90, $\bar{f_{I L}}$

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Fig. 9. $f_{S R}$ and $f_{I L}$ as a function of wavelength when the P_out1∶P_out2 of device are 50∶50, 40∶60, 30∶80, 20∶80 and 10∶90 respectively. (a) $f_{S R}$ ; (b) $f_{I L}$

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Table 1. Parameters and performance of devices with different $f_{S R}$ when polarization-independent condition is satisfied
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Table 1. Parameters and performance of devices with different $f_{S R}$ when polarization-independent condition is satisfied
$f_{S R}$ P_out1：P_out2 g₁ /nm $n_{S i N_{x}}$ $f_{I L}$ （TE）/dB $f_{I L}$ （TM）/dB
0.5 50∶50 100 3.20 0.04 0.02
0.6 40∶60 124 2.91 0.07 0.03
0.7 30∶70 153 2.68 0.09 0.03
0.8 20∶80 198 2.37 0.14 0.03
0.9 10∶90 273 2.03 0.26 0.10

Table 2. Comparison of performance of optical power splitters with designable $f_{S R}$

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Table 2. Comparison of performance of optical power splitters with designable $f_{S R}$

Reference	Structure	Size	Range of $f_{S R}$	Bandwidth /nm	$f_{I L}$ /dB	Polarization
［11］	MMI	3.6 μm×3.6 μm	0.50‒0.80	30	0.97	dependent
［14］	Y-junction	1.4 μm×2.3 μm	0.50‒0.98	100	0.36	dependent
［15］	AC	4 μm×240 μm	0.50‒0.93	100	1.00	dependent
［16］	AC	L＝80 μm	0.50‒1.00	100	0.05	dependent
［13］	DC	L<30 μm	0.50‒1.00	100 （ $f_{S R}$ =0.50）	0.10 （ $f_{S R}$ =0.50）	independent
Our work	Sandwich AC	L＝7 μm	0.50‒0.95	100	0.31（0.17）	independent

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Jingli Wang, Haiguang Liu, Yueteng Zhang, Yuchen Song, Hanxiao Shen, Heming Chen, Kai Zhong. Polarization-Independent Optical Power Splitter with a Designable Splitting Ratio[J]. Laser & Optoelectronics Progress, 2023, 60(17): 1723001

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Paper Information

Category: Optical Devices

Received: Jul. 3, 2022

Accepted: Sep. 13, 2022

Published Online: Sep. 13, 2023

The Author Email: Jingli Wang (jlwang@njupt.edu.cn)

DOI:10.3788/LOP222232

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Parameters and performance of devices with different fSR when polarization-independent condition is satisfied

Table 1. Parameters and performance of devices with different fSR when polarization-independent condition is satisfied

Table 2. Comparison of performance of optical power splitters with designable fSR

Table 2. Comparison of performance of optical power splitters with designable fSR

Table 1. Parameters and performance of devices with different $f_{S R}$ when polarization-independent condition is satisfied

Table 1. Parameters and performance of devices with different $f_{S R}$ when polarization-independent condition is satisfied

Table 2. Comparison of performance of optical power splitters with designable $f_{S R}$

Table 2. Comparison of performance of optical power splitters with designable $f_{S R}$