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Lithium tantalate photonic integrated circuits for volume manufacturing

Engineering and Technology

Lithium tantalate photonic integrated circuits for volume manufacturing

C. Wang, Z. Li, et al.

This innovative research by Chengli Wang and colleagues showcases the potential of lithium tantalate (LiTaO3) in developing low-loss electro-optical photonic integrated circuits (PICs), presenting a breakthrough alternative to traditional lithium niobate (LiNbO3) materials. Their findings reveal impressive properties for a 5G filter application, promoting scalable and cost-effective solutions for the future of communication technologies.

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Playback language: English
Abstract
High-cost and limited wafer size hinder the industrial use of lithium niobate (LiNbO3)-based electro-optical photonic integrated circuits (PICs). This paper reports low-loss PICs made of lithium tantalate (LiTaO3), a commercially viable material for 5G filters, exhibiting comparable or superior properties to LiNbO3. Using deep ultraviolet (DUV) stepper-based manufacturing, low-loss (5.6 dB m⁻¹) PICs were created, demonstrating a LiTaO3 Mach–Zehnder modulator with a 1.9 V cm half-wave voltage–length product and up to 40 GHz electro-optic bandwidth. LiTaO3's lower birefringence enables high-density circuits and broadband operation, and the platform supports soliton microcomb generation, paving the way for scalable, low-cost, high-volume electro-optical PICs.
Publisher
Nature
Published On
May 08, 2024
Authors
Chengli Wang, Zihan Li, Johann Riemensberger, Grigory Lihachev, Mikhail Churaev, Wil Kao, Xinru Ji, Junyin Zhang, Terence Blesin, Alisa Davydova, Yang Chen, Kai Huang, Xi Wang, Xin Ou, Tobias J. Kippenberg
Tags
lithium tantalate
photonic integrated circuits
low-loss PICs
electro-optic bandwidth
5G filters
microcomb generation

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