Compact substrate-removed thin-film lithium niobate electro-optic modulator featuring polarization-insensitive operation

Pan, Ying; He, Mingbo; Xu, Mengyue; Lin, Zhongjin; Lin, Yuechuan; Ke, Wei; Liu, Jie; Lin, Zhenrui; Zhu, Yuntao; Gao, Shenqian; Li, Hao; Liu, Xiaoyue; Liu, Chuan; Yu, Siyuan; Cai, Xinlun

doi:10.1364/ol.454277

Cited by 15 publications

(3 citation statements)

References 17 publications

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“…81 Driving by this robust dry etch method, rapid progresses have been made in the recent five years. 15,17,20,73,82–84 In 2018, a TFLN EO modulator with 3 dB bandwidth beyond 45 GHz and CMOS-compatible driving voltage ( V π = 1.4 V) was demonstrated, as shown in Fig. 5(a), which is considered as a milestone in the development history of TFLN EO modulators.…”

Section: State-of-the-art Of Tfln or Eop Modulatorsmentioning

confidence: 99%

Perspectives of thin-film lithium niobate and electro-optic polymers for high-performance electro-optic modulation

Wang¹,

Chen²,

Zhang³

et al. 2023

J. Mater. Chem. C

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Section: State-of-the-art Of Tfln or Eop Modulatorsmentioning

confidence: 99%

Perspectives of thin-film lithium niobate and electro-optic polymers for high-performance electro-optic modulation

Wang¹,

Chen²,

Zhang³

et al. 2023

J. Mater. Chem. C

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“…Table 1 and 2 summarize the progress of different TFLN modulators with the MZI structure. [ 5,6,12,15,26–107 ] Figure summarizes the half‐wave voltage, device length, and bandwidth of etched and non‐etched TFLN modulators. Both these two kinds of modulators can realize a very high bandwidth.…”

Section: Mzi‐based Tfln Modulatormentioning

confidence: 99%

Compact and Efficient Thin‐Film Lithium Niobate Modulators

Chen,

Gao,

Lin

et al. 2023

Advanced Photonics Research

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Thin‐film lithium niobate (TFLN) modulators have garnered significant attention in the field of integrated photonics due to their ability to manipulate light. Numerous TFLN modulators have been demonstrated over the past few years, with speed records consistently being broken. However, due to the low refractive index contrast and anisotropic properties of TFLN, modulators based on this material feature larger device sizes and lower efficiency. A more compact and efficient modulator is important, as it is required for future dense integration and low power consumption applications. There have been some reports on how to reduce device size, and research is ongoing. A comprehensive summary can help individuals understand the current state of research and existing problems. In this review, we provide an overview of recent advancements in TFLN modulator technology, focusing on compactness and efficiency. Herein, various types of modulators, such as the Mach–Zehnder interferometer, Michelson interferometer, resonator cavity, and Z‐cut type modulators, are discussed. Moreover, potential improvement strategies and applications for compact and efficient TFLN modulators in advanced photonic systems are explored. In conclusion, in this review, the recent achievements in compact and efficient TFLN modulators are summarized and their significance in various optoelectronic applications is emphasized.

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“…A polarization diversity scheme is a typical approach to alleviate the polarization sensitivity in EO modulation on LN platforms. , In the scheme, the incident light of arbitrary polarization states is initially split into TE and TM polarizations, which are then transmitted along separate optical paths. Subsequently, one polarization rotates such that their polarizations are the same, and they then individually undergo identical processing.…”

Section: Introductionmentioning

confidence: 99%

Polarization-Insensitive Electrooptic Modulation on Anisotropic Thin-Film Lithium Niobate

Liu,

Chen,

Chu

2024

ACS Photonics

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Lithium niobate (LN) is an ideal material for electrooptic (EO) modulation due to its strong EO effect. However, significant differences exist in the EO modulation efficiencies for different polarizations, given the anisotropy of LN. Here, we propose an innovative approach to mitigate the modulation polarization dependence of thin-film LN. We convert one of the orthogonal polarizations of the incident light to the higher-order mode of the other polarization and utilize mode-compatible components to achieve mode-independent signal processing, thereby converting the polarization issue into a mode issue and achieving polarization-independent signal processing. We also demonstrated a polarization-insensitive EO switch to validate this approach. The fabricated device demonstrates a low polarization-dependent loss of 0−2.4 dB across a 30 nm range (1260−1290 nm) and achieves the same modulation efficiency of 2.7 V•cm for TE and TM polarizations. The approach provides a robust solution to the EO modulation polarization dependence problem caused by the anisotropy in LN and other similar materials.

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Compact substrate-removed thin-film lithium niobate electro-optic modulator featuring polarization-insensitive operation

Cited by 15 publications

References 17 publications

Perspectives of thin-film lithium niobate and electro-optic polymers for high-performance electro-optic modulation

Perspectives of thin-film lithium niobate and electro-optic polymers for high-performance electro-optic modulation

Compact and Efficient Thin‐Film Lithium Niobate Modulators

Polarization-Insensitive Electrooptic Modulation on Anisotropic Thin-Film Lithium Niobate

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