Study of Multi-Channel Mode-Division Multiplexing Based on a Chalcogenide-Lithium Niobate Platform

被引：0
|
作者：
Zheng, Jiacheng [1 ,2 ,3 ]
Liu, Bowen [1 ,2 ,3 ]
Weng, Yuefei [1 ,2 ,3 ]
Song, Baoan [1 ,2 ,3 ]
机构：
[1] Ningbo Univ, Fac Elect Engn & Comp Sci, Ningbo 315211, Peoples R China
[2] Zhejiang Key Lab Photoelect Mat & Devices, Ningbo 315211, Peoples R China
[3] Engn Res Ctr Adv Infrared Photoelect Mat & Devices, Ningbo 315211, Peoples R China
来源：
CRYSTALS | 2024年 / 14卷 / 01期
基金：
中国国家自然科学基金;
关键词：
chalcogenide films; lithium niobate films; asymmetric directional coupler; mode-division multiplexer; 2-MODE (DE)MULTIPLEXER; SILICON-NITRIDE; WAVE-GUIDES; PHOTONICS; COMPACT;
D O I：
10.3390/cryst14010073
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
A multi-channel mode-division multiplexing based on a chalcogenide-lithium niobate platform using chalcogenide films with adjustable refractive index is proposed, with the aim of overcoming issues with narrow bandwidth and large crosstalk in conventional multiplexers. An asymmetric directional coupler, employing chalcogenide-based thin-film modulation, was designed to realize the multiplexing and separation of TE1, TE2, and TE3 modes. Simulations show that the device is capable of obtaining an insertion loss of between 0.03 dB and 0.7 dB and a crosstalk of between -21.66 dB and -28.71 dB at 1550 nm. The crosstalk of the TE1, TE2, and TE3 modes is below -20.1 dB when accessing the waveguide output port in the 1500-1600 nm band. The proposed multiplexer is a promising approach to enhance the transmission capability of thin-film lithium-niobate-integrated optical paths.
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页数：11
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