• Journal of Infrared and Millimeter Waves
  • Vol. 41, Issue 3, 626 (2022)
Hong-Jie GUO1、3, Hai-Feng LIU1、*, Zhen-Nuo WANG2、3, Man-Qing TAN1、3、**, Zhi-Yong LI1, Ming Lei3, and Wen-Tao GUO1
Author Affiliations
  • 1State Key Laboratory of Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China
  • 2National Engineering Research Center for Optoelectronic Devices,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China
  • 3College of Materials Science and Opto-electronics Technology,University of Chinese Academy of Sciences,Beijing 100049,China
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    DOI: 10.11972/j.issn.1001-9014.2022.03.014 Cite this Article
    Hong-Jie GUO, Hai-Feng LIU, Zhen-Nuo WANG, Man-Qing TAN, Zhi-Yong LI, Ming Lei, Wen-Tao GUO. Design of a novel Y-junction electro-optic modulator based on thin film lithium niobite[J]. Journal of Infrared and Millimeter Waves, 2022, 41(3): 626 Copy Citation Text show less

    Abstract

    In recent years, the high-performance electro-optic modulator based on the thin-film lithium niobate (TFLN) platform has been receiving considerable attention due to the featuring small footprint and low energy loss. In this paper, a novel Y-junction electro-optic modulator with a vertical electrode structure was designed based on TFLN. The relationship between the low half-wave voltage and the buffer layer thickness for the novel modulator was investigated. Meanwhile, the design parameters of Y-junction were optimized, and found that the half-wave voltage is less than 1.5 V and the insertion loss is less than 5 dB. Finally, the Y-junction electro-optic modulator was fabricated. This study not only provides insights on the design and realization of compact footprint photonic waveguides in the TFLN platform but also, experimental evidence for the fabrication of electro-optic modulators with high-performance and multifunction.

    Introduction

    In the last decades,photonic integrated circuits(PICs)have emerged as a mature and industrial platform,enabling the integration of active and passive optical components on a single chip in a scalable manner. Prominent PIC platforms,which are being developed to industrial scale,are silicon on insulator(SOI)12,silicon nitride(SiN)34,indium phosphate(InP)56,and lithium niobate(LN)78. Lithium niobate(LiNbO3,LN)is one of the most remarkable optical platforms due to its broad transparent windows and excellent electro-optic properties(γ33= 31.2 pm/V). LN phase modulator(PM)is utilized as a tool to convert electrical signals into optical signals,and that plays vital roles in optical communication networks910,precision optical sensors1112,quantum photonics13,and non-reciprocal optics1415.

    Hong-Jie GUO, Hai-Feng LIU, Zhen-Nuo WANG, Man-Qing TAN, Zhi-Yong LI, Ming Lei, Wen-Tao GUO. Design of a novel Y-junction electro-optic modulator based on thin film lithium niobite[J]. Journal of Infrared and Millimeter Waves, 2022, 41(3): 626
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