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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 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 languageEnglish
Pages (from-to)2940-2943
Number of pages4
JournalOptics Letters
Volume46
Issue number12
DOIs
Publication statusPublished - 15 Jun 2021

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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