Inverse design of an ultra-compact and large-bandwidth bent subwavelength grating wavelength demultiplexer

Zhengwei Wu; Jin Wen; Jin Wen; Jin Wen; Hui Zhang; Qian Wang; Huimin Yu; Yu Pan; Ying Zhang; Zhanzhi Liu

doi:10.1364/AO.502386

Applied Optics
Vol. 62,
Issue 31,
pp. 8292-8298
(2023)
•https://doi.org/10.1364/AO.502386

Inverse design of an ultra-compact and large-bandwidth bent subwavelength grating wavelength demultiplexer

Zhengwei Wu, Jin Wen, Hui Zhang, Qian Wang, Huimin Yu, Yu Pan, Ying Zhang, and Zhanzhi Liu

Not Accessible

Your library or personal account may give you access

Get PDF
Email
Share
Get Citation
Copy Citation Text
Zhengwei Wu, Jin Wen, Hui Zhang, Qian Wang, Huimin Yu, Yu Pan, Ying Zhang, and Zhanzhi Liu, "Inverse design of an ultra-compact and large-bandwidth bent subwavelength grating wavelength demultiplexer," Appl. Opt. 62, 8292-8298 (2023)

Export Citation
- BibTex
- Endnote (RIS)
- HTML
- Plain Text
Citation alert
Save article

Check for updates

Related Topics
Table of Contents Category
- Optical Devices, Sensors, and Detectors
Optics & Photonics Topics
?

The topics in this list come from the Optics and Photonics Topics applied to this article.

About this Article
History
- Original Manuscript: August 3, 2023
- Revised Manuscript: September 17, 2023
- Manuscript Accepted: September 25, 2023
- Published: October 23, 2023

Abstract

Inverse design has attracted significant attention as a method to improve device performance and compactness. In this research, we employed a combination of forward design and the inverse algorithm using particle swarm optimization (PSO) to design a bent ultra-compact 1310/1550 nm broadband wavelength demultiplexer assisted by a subwavelength grating (SWG). Through the phase matching at 1550 nm and the phase mismatch at 1310 nm, we rapidly designed the width parameters of SWG in the forward direction. Then the PSO algorithm was used to optimize the SWG parameters in a certain range to achieve the best performance. Additionally, we introduced a new bent dimension significantly reducing the device length while maintaining low insertion loss (IL) and high extinction ratios (ERs). It has been verified that the length of the device is only 7.8 µm, and it provides a high ER of 24 dB at 1310 nm and 27 dB at 1550 nm. The transmitted spectrum shows that the IL values at both wavelengths are below 0.1 dB. Meanwhile, the 1 dB bandwidth exceeds 150 nm, effectively covering the entire O-band and C-band. This approach has been proven successful in enhancing performance and significantly reducing the device footprint.

Full Article | PDF Article

More Like This

Compact silicon-based on-chip wavelength triplexer using directional couplers with double bridged subwavelength gratings

Jingyuan Chen and Jinbiao Xiao
Appl. Opt. 60(30) 9587-9593 (2021)

Inverse design of an ultra-compact dual-band wavelength demultiplexing power splitter with detailed analysis of hyperparameters

Aolong Sun, Xuyu Deng, Sizhe Xing, Zhongya Li, Junlian Jia, Guoqiang Li, An Yan, Penghao Luo, Yixin Li, Zhiteng Luo, Jianyang Shi, Ziwei Li, Chao Shen, Bingzhou Hong, Wei Chu, Xi Xiao, Nan Chi, and Junwen Zhang
Opt. Express 31(16) 25415-25437 (2023)

Design and analysis of a compact subwavelength-grating-assisted 1.55/2 µm wavelength demultiplexer

Jianfei Liao, Yuan Xie, Tianye Huang, and Zhuo Cheng
Appl. Opt. 60(16) 4972-4975 (2021)

Previous Article Next Article

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (8)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Device	Coupling Length	IL (1310 nm/1550 nm)	ER (1310 nm/1550 nm)
[18]	13.5 µm	0.27 dB/0.08 dB	15 dB/15 dB
[21]	9 µm	0.1 dB/0.05 dB	23 dB/19 dB
[26]	43.4 µm	0.1 dB/0.1 dB	20 dB/20 dB
Our device	7.8 µm	0.08 dB/0.07 dB	24 dB/27 dB

Parameters	Symbol	Value
Top $S_{i}$ thickness	$h$	220 nm
Gap	$g$	100 nm
S-bent SEG waveguide radius	$R_{1}$	27 µm
S-bent waveguide radius	$R_{2}$	12 µm
Strip waveguide width	$W_{A}$	400 nm
SWG waveguide width	$W_{B}$	834 nm
SWG pitch	$Λ$	250 nm
$S_{i}$ segment length	$a$	174 nm
SWG taper length	$L_{t a p e r}$	10 µm
Coupling length	$L_{c}$	13.1 µm
a-change	$θ$	30 nm

Parameters	Symbol	Value
Top Si thickness	$h$	220 nm
Gap	$g$	100 nm
S-bent SEG waveguide radius	$R_{1}$	27 µm
S-bent waveguide radius	$R_{2}$	12 µm
Strip waveguide width	$W_{A}$	400 nm
SWG waveguide width	$W_{B}$	840 nm
SWG pitch	$Λ$	258 nm
Si segment length	$a$	178 nm
SWG taper length	$L_{t a p e r}$	10 µm
Coupling length	$L_{c}$	7.8 µm
a-change	$θ$	30 nm

Device	Coupling Length	IL (1310 nm/1550 nm)	ER (1310 nm/1550 nm)
[18]	13.5 µm	0.27 dB/0.08 dB	15 dB/15 dB
[21]	9 µm	0.1 dB/0.05 dB	23 dB/19 dB
[26]	43.4 µm	0.1 dB/0.1 dB	20 dB/20 dB
Our device	7.8 µm	0.08 dB/0.07 dB	24 dB/27 dB

Parameters	Symbol	Value
Top $S_{i}$ thickness	$h$	220 nm
Gap	$g$	100 nm
S-bent SEG waveguide radius	$R_{1}$	27 µm
S-bent waveguide radius	$R_{2}$	12 µm
Strip waveguide width	$W_{A}$	400 nm
SWG waveguide width	$W_{B}$	834 nm
SWG pitch	$Λ$	250 nm
$S_{i}$ segment length	$a$	174 nm
SWG taper length	$L_{t a p e r}$	10 µm
Coupling length	$L_{c}$	13.1 µm
a-change	$θ$	30 nm

Abstract

Data availability

Cited By

Figures (8)

Tables (3)

Equations (8)

Applied Optics