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Spectrum-continuous narrowband filter with an enhanced flat-top passband and sharp roll-off performance

delete2021-10-25
delete3
PRE
AI
D
Dong Liang *
Q
Qinggui Tan
W
Wei Jiang
W
Wu Zhang
D
Di Wang
J
Jingwen Gong
李晓军 cover
李晓军 (Xiaojun Li)
L
Li Li
Z
Zhiyao Zhang
Y
Yong Liu
DOI：10.1364/OL.438370delete
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Abstract

Abstract

En 中文
We demonstrate a spectrum-continuous narrowband filter based on multi-section Mach-Zehnder interferometer (MZI) structures on a silicon nitride platform. Enhanced in-band flatness and sharp out-of-band roll-off features are achieved by cascading MZIs of specific functionalities in a series. This filter is fabricated in a single chip with a total waveguide length exceeding 237 cm. We experimentally demonstrate for the first time, to the best of our knowledge, a four-channel spectrum-continuous filter with a 3 dB bandwidth of 580 MHz, a 1 dB fluctuation bandwidth as high as 356 MHz, and an excellent 20 dB roll-off factor of 1.26 that are obtained simultaneously. Both the optical and electrical experimental results show that the proposed filter can play a key role in integrated microwave photonic front-end systems. (C) 2021 Optical Society of America

Journal

Optics Letters cover
Optics Letters
IF:
3.3
Papers:
4.0W
Citations:
7.6W

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No organization information available