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author:

Lu, Mengjia (Lu, Mengjia.) [1] | Guo, Zhenzhao (Guo, Zhenzhao.) [2] (Scholars:郭振钊) | Deng, Chunyu (Deng, Chunyu.) [3] | Hu, Xuefang (Hu, Xuefang.) [4] | Chen, Mengmeng (Chen, Mengmeng.) [5]

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Abstract:

A broadband and low-loss power splitter with polarization manipulation using subwavelength gratings (SWGs) is proposed and analyzed, where SWGs are embedded in input taper/output inverse tapered waveguides in the bottom layer to form an SWG-based structure, and a silicon nitride layer is placed above the bottom layer to form a low-index guiding structure. In the bottom layer, the TE mode is cut off as the input strip waveguide is tapered down. In this way, the injected TE mode is evenly coupled to two adjacent output ports with high efficiency by the assistance of SWGs. By contrast, the input TM mode is well supported by the above silicon nitride layer and directly transmitted to the Through port, which is almost not influenced by the bottom structures. Consequently, both power splitting and polarization handling are achieved in the designed device simultaneously. Simulation results show that an extinction ratio (ER) of 32.63 dB (18.56 dB) and insertion loss (IL) of 0.16 dB (0.16 dB) for the TE (TM) mode are obtained at 1.55 mu m. The bandwidth is up to 191 nm (1450-1641 nm) for the TE mode and 200 nm (1450-1650 nm) for the TM mode with an ER exceeding 15 dB and IL below 0.3 dB. Furthermore, fabrication tolerances and power distribution with polarization manipulation through the device are also presented. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

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Community:

  • [ 1 ] [Lu, Mengjia]Jiangsu Open Univ, Sch Informat Technol, Nanjing 210036, Peoples R China
  • [ 2 ] [Guo, Zhenzhao]Fuzhou Univ, Sch Phys & Informat Engn, Fuzhou 350108, Peoples R China
  • [ 3 ] [Deng, Chunyu]Henan Normal Univ, Sch Phys, Henan Key Lab Infrared Mat & Spectrum Measures & A, Xinxiang 453007, Peoples R China
  • [ 4 ] [Hu, Xuefang]Ningbo Univ Finance & Econ, Coll Digital Technol & Engn, Ningbo 315175, Zhejiang, Peoples R China
  • [ 5 ] [Chen, Mengmeng]Nanjing Xiaozhuang Univ, Coll Elect Engn, Nanjing 211171, Peoples R China

Reprint 's Address:

  • [Chen, Mengmeng]Nanjing Xiaozhuang Univ, Coll Elect Engn, Nanjing 211171, Peoples R China;;

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Source :

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS

ISSN: 0740-3224

Year: 2024

Issue: 8

Volume: 41

Page: 1856-1862

1 . 8 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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