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Twelve-channel LAN wavelength-division multiplexer on lithium niobate

Twelve-channel LAN wavelength-division multiplexer on lithium niobate

Authors :
He Jianghao
Zhang Ming
Liu Dajian
Bao Yaoxin
Li Chenlei
Pan Bingcheng
Huang Yishu
Yu Zejie
Liu Liu
Shi Yaocheng
Dai Daoxin
Source :
Nanophotonics, Vol 13, Iss 1, Pp 85-93 (2023)
Publication Year :
2023
Publisher :
De Gruyter, 2023.

Abstract

A twelve-channel local-area-network (LAN) wavelength-division multiplexing (LWDM) filter is proposed and demonstrated with a uniform channel spacing of 4.5 nm (800 GHz) in the O-band of 1270–1330 nm by using x-cut lithium-niobate-on-insulator (LNOI) photonic waveguides for the first time. The present LWDM filter consists of twelve single-channel bandpass filters based on multimode waveguide gratings (MWGs) assisted with a TE0/TE1 mode (de)multiplexer. In particular, two stages of MWGs in cascade are introduced for each single-channel bandpass filter, in order to achieve high sidelobe suppression ratios, thus reducing interchannel crosstalk. For the fabricated twelve-channel LWDM filter, all the channels have very excellent box-like spectral responses with low excess losses of ∼0.6 dB, broad 1-dB bandwidths of ∼2.9–3.4 nm (which is close to 75 % of the channel spacing), and ultra-low interchannel crosstalk of

Details

Language :
English
ISSN :
21928614
Volume :
13
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Nanophotonics
Publication Type :
Academic Journal
Accession number :
edsdoj.5caa84f12e91477894710eaf04750ef8
Document Type :
article
Full Text :
https://doi.org/10.1515/nanoph-2023-0665