Folded thin-film lithium niobate modulator based on a poled Mach-Zehnder interferometer structure

Jinyao Hu; Chijun Li; Changjian Guo; Chao Lu; Alan Pak Tao Lau; Pengxin Chen; Liu Liu

doi:10.1364/OL.426083

Folded thin-film lithium niobate modulator based on a poled Mach-Zehnder interferometer structure

Jinyao Hu, Chijun Li, Changjian Guo, Chao Lu, Alan Pak Tao Lau, Pengxin Chen, Liu Liu

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

43 Citations (Scopus)

Abstract

The thin-film lithium niobate structure has been used recently to construct compact and high-performance electro-optical modulators. Due to the moderate electrooptical coefficient of the lithium niobate material, the device length of such a modulator is still long, a few centimeters usually. Here, a folded Mach-Zehnder interferometer based modulator on x-cut thin-film lithium niobate is demonstrated. An effective poling procedure is developed to activate the device. The proposed modulator structure can shorten the device length without affecting its performance. The measured Vπ L product of a fabricated and completely poled folded modulator is about 2.74 V cm, and the 3 dB electro-optical bandwidth is about 55 GHz. They are close to those of a conventional Mach-Zehnder modulator with a straight modulation section.

Original language	English
Pages (from-to)	2940-2943
Number of pages	4
Journal	Optics Letters
Volume	46
Issue number	12
DOIs	https://doi.org/10.1364/OL.426083
Publication status	Published - 15 Jun 2021

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OL.426083

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title = "Folded thin-film lithium niobate modulator based on a poled Mach-Zehnder interferometer structure",

abstract = "The thin-film lithium niobate structure has been used recently to construct compact and high-performance electro-optical modulators. Due to the moderate electrooptical coefficient of the lithium niobate material, the device length of such a modulator is still long, a few centimeters usually. Here, a folded Mach-Zehnder interferometer based modulator on x-cut thin-film lithium niobate is demonstrated. An effective poling procedure is developed to activate the device. The proposed modulator structure can shorten the device length without affecting its performance. The measured Vπ L product of a fabricated and completely poled folded modulator is about 2.74 V cm, and the 3 dB electro-optical bandwidth is about 55 GHz. They are close to those of a conventional Mach-Zehnder modulator with a straight modulation section.",

author = "Jinyao Hu and Chijun Li and Changjian Guo and Chao Lu and Lau, {Alan Pak Tao} and Pengxin Chen and Liu Liu",

note = "Funding Information: Funding. National Key Research and Development Program of China (2019YFB1803902); Science and Technology Planning Project of Guangdong Province (2019A050510039); Natural Science Foundation of Guangdong Province (2018A0303130117); Fundamental Research Funds for the Central Universities (2021QNA5001). Publisher Copyright: {\textcopyright} 2021 Optical Society of America.",

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doi = "10.1364/OL.426083",

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AU - Hu, Jinyao

AU - Li, Chijun

AU - Guo, Changjian

AU - Lu, Chao

AU - Lau, Alan Pak Tao

AU - Chen, Pengxin

AU - Liu, Liu

N1 - Funding Information: Funding. National Key Research and Development Program of China (2019YFB1803902); Science and Technology Planning Project of Guangdong Province (2019A050510039); Natural Science Foundation of Guangdong Province (2018A0303130117); Fundamental Research Funds for the Central Universities (2021QNA5001). Publisher Copyright: © 2021 Optical Society of America.

PY - 2021/6/15

Y1 - 2021/6/15

N2 - The thin-film lithium niobate structure has been used recently to construct compact and high-performance electro-optical modulators. Due to the moderate electrooptical coefficient of the lithium niobate material, the device length of such a modulator is still long, a few centimeters usually. Here, a folded Mach-Zehnder interferometer based modulator on x-cut thin-film lithium niobate is demonstrated. An effective poling procedure is developed to activate the device. The proposed modulator structure can shorten the device length without affecting its performance. The measured Vπ L product of a fabricated and completely poled folded modulator is about 2.74 V cm, and the 3 dB electro-optical bandwidth is about 55 GHz. They are close to those of a conventional Mach-Zehnder modulator with a straight modulation section.

AB - The thin-film lithium niobate structure has been used recently to construct compact and high-performance electro-optical modulators. Due to the moderate electrooptical coefficient of the lithium niobate material, the device length of such a modulator is still long, a few centimeters usually. Here, a folded Mach-Zehnder interferometer based modulator on x-cut thin-film lithium niobate is demonstrated. An effective poling procedure is developed to activate the device. The proposed modulator structure can shorten the device length without affecting its performance. The measured Vπ L product of a fabricated and completely poled folded modulator is about 2.74 V cm, and the 3 dB electro-optical bandwidth is about 55 GHz. They are close to those of a conventional Mach-Zehnder modulator with a straight modulation section.

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JO - Optics Letters

JF - Optics Letters

IS - 12

ER -

Folded thin-film lithium niobate modulator based on a poled Mach-Zehnder interferometer structure

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