An 8 × 200 Gbps wavelength-division multiplexing transmitter using lithium tantalate

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State Key Laboratory of Extreme Photonics and Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, China
2.
ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, 311215, China
3.
Jiaxing Key Laboratory of Photonic Sensing & Intelligent Imaging, Intelligent Optics & Photonics Research Center, Jiaxing Research Institute, Zhejiang University, Jiaxing, 314000, China

Funds: This work was supported by the National Key Research and Development Program of China (2022YFB2803800), the National Natural Science Foundation of China (U23B2047), the Zhejiang Provincial Natural Science Foundation of China (LDT23F04012F05).

摘要

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Abstract: Large-capacity data transmission is increasingly required to meet the growing demands of big data and artificial intelligence applications. Wavelength-division multiplexing (WDM) technology is a reliable method of increasing link capacity by enabling multiple wavelength signals to be transmitted in a single channel. Here, for the first time, a large-capacity transmitter on thin-film lithium tantalate-on-insulator (LTOI) is demonstrated by monolithically integrating an 8-channel WDM and Mach–Zehnder interferometer (MZI) electro-optic modulators (EOMs). The integrated 8-channel WDM, comprised of 8 cascaded waveguide Bragg grating optical filters, realizes channel spacing of 16.8 nm, 1-dB bandwidth of 15.4 nm, and thermal sensitivity of 10 pm/ºC. The MZI EOMs show low direct current drift and 3-dB bandwidth beyond 67 GHz. Finally, the WDM transmitter achieves a data rate of 100 Gbps OOK and 200 Gbps PAM4 for a single channel, indicating the demonstrated total capacity of 1.6 Tbps. Therefore, the demonstrated large-capacity WDM transmitter will find many applications, such as artificial intelligence and data centers.

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doi: 10.1186/s43074-025-00183-6

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An 8 × 200 Gbps wavelength-division multiplexing transmitter using lithium tantalate

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doi: 10.1186/s43074-025-00183-6

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An 8 × 200 Gbps wavelength-division multiplexing transmitter using lithium tantalate

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PhotoniX

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