Compact electro-optic modulator on lithium niobate

Dai, Daoxin; Pan, Bingcheng; Cao, Hong; Huang, Yishu; wang, zong; Chen, Kaixuan; Li, Huan; Yu, Zejie

doi:10.1364/prj.449172

Cited by 42 publications

(15 citation statements)

References 31 publications

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“…The photonic waveguide platform that is used in this work to demonstrate the isolator is the silicon nitrideloaded LNOI 19,20 . A cross-section of the phase modulator is illustrated in Fig.…”

Section: δTmentioning

confidence: 99%

Spatio-temporal isolator in lithium niobate on insulator

Huang¹,

Balčytis²,

Dubey³

et al. 2023

OES

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In this contribution, we simulate, design, and experimentally demonstrate an integrated optical isolator based on spatiotemporal modulation in the thin-film lithium niobate on an insulator waveguide platform. We used two cascaded travelling wave phase modulators for spatiotemporal modulation and a racetrack resonator as a wavelength filter to suppress the sidebands of the reverse propagating light. This enabled us to achieve an isolation of 27 dB. The demonstrated suppression of the reverse propagating light makes such isolators suitable for the integration with III-V laser diodes and Erbium doped gain sections in the thin-film lithium niobate on the insulator waveguide platform.

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Section: δTmentioning

confidence: 99%

Spatio-temporal isolator in lithium niobate on insulator

Huang¹,

Balčytis²,

Dubey³

et al. 2023

OES

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“…Also, the fabrication tolerance and the insertion loss of a photonic-crystal structure restrict the modulation performances. In addition, for a conventional Fabry–Perot (FP) resonator [Figure (h)], the modulated light is reflected back to the input port, and thus an external isolator or circulator is usually required to avoid disturbing the transmission system. , To address the above issues, a new 2 × 2 FP-cavity-based modulator have been proposed and experimentally demonstrated [Figure (i)] . Through asymmetric multimode-waveguide gratings, the input forward TE 0 mode is converted to a backward TE 1 mode and then dropped by a mode (de)multiplexer.…”

Section: Electro-optics With Lnoimentioning

confidence: 99%

“…The reflected signal is then output from the drop port (different from the input port). Such a 2 × 2 FP-cavity modulator features 40-Gbps-OOK and 80-Gbps-PAM4 eye diagrams . Furthermore, by optimizing the structural parameters, the Q -factor of the FP cavity can be readily reduced to greatly increase the bandwidth to >110 GHz …”

Section: Electro-optics With Lnoimentioning

confidence: 99%

Perspective on Lithium-Niobate-on-Insulator Photonics Utilizing the Electro-optic and Acousto-optic Effects

et al. 2023

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For lithium niobate, electro-optics and acoustooptics are the most attractive areas due to the excellent electrooptic, piezoelectric, and photoelastic properties of the material. The past decade has witnessed tremendous breakthroughs of nanophotonic devices based on the emerging thin-film lithium niobate, making it a highly promising platform for new-generation integrated photonics. In this perspective, we focus on the electrooptics and acousto-optics in lithium niobate, reviewing the most recent advances and major challenges, meanwhile providing our insight on the exciting prospect of this emerging field.

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“…[21] Currently multimode photonics has been investigated extensively on silicon, and various multimode silicon photonic devices have been developed successfully, including mode (de)multiplexers, [22,23] multimode waveguide bends (MWBs), [24][25][26][27][28] and multimode waveguide crossings, [29,30] etc. Furthermore, multimode photonics also shows great potential for some applications such as enhanced electro-optic and thermo-optic modulations, [31,32] phasematching for nonlinear photonics, [33,34] and high-Q ringresonators, [35,36] etc.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Mode‐Multiplexing Device with Anisotropic Lithium‐Niobate‐on‐Insulator Waveguides

Zhao

Liu

Zhu

et al. 2023

Laser & Photonics Reviews

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Thin-film lithium-niobate photonics has attracted intensive attention due to its superior material properties. In particular, multimode lithium-niobate photonics is becoming attractive for the applications of high-capacity optical interconnects and high-efficiency nonlinear optics. However, multimode manipulation in lithium-niobate-on-insulator (LNOI) waveguides is not easy because there might occur some mode hybridness due to the vertical asymmetry as well as the material anisotropy. In this paper, high-performance mode-multiplexing devices with anisotropic LNOI waveguides are proposed, consisting of a multi-channel mode (de)multiplexer and a sharp multimode waveguide bend (MWB). The mode (de)multiplexer is designed with Z-propagation LNOI waveguides to avoid the mode hybridness. Meanwhile, the sharp MWB is designed to connect with a Y-propagation waveguide, enabling access to the highest electro-optic coefficient and second-order nonlinear coefficient. The fabricated mode (de)multiplexer has a low excess loss less than 0.2 dB as well as low crosstalk less than -19 dB in the wavelength range of 1520-1600 nm. These high-performance multimode photonic devices are useful for developing multimode LN photonics.

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Compact electro-optic modulator on lithium niobate

Cited by 42 publications

References 31 publications

Spatio-temporal isolator in lithium niobate on insulator

Spatio-temporal isolator in lithium niobate on insulator

Perspective on Lithium-Niobate-on-Insulator Photonics Utilizing the Electro-optic and Acousto-optic Effects

High‐Performance Mode‐Multiplexing Device with Anisotropic Lithium‐Niobate‐on‐Insulator Waveguides

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