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Abstract
Integrated lithium niobate (LN) photonics is a promising platform for future chip-scale microwave photonics systems owing to its unique electro-optic properties, low optical loss, and excellent scalability. A key enabler for such systems is a highly linear electro-optic modulator that could faithfully convert analog electrical signals into optical signals. In this work, we demonstrate a monolithic integrated LN modulator with an ultra-high spuriousfree dynamic range (SFDR) of 120.04 dB · Hz4/5 at 1 GHz, using a ring-assisted Mach-Zehnder interferometer configuration. The excellent synergy between the intrinsically linear electro-optic response of LN and an optimized linearization strategy allows us to fully suppress the cubic terms of third-order intermodulation distortions (IMD3) without active feedback controls, leading to ~20 dB improvement over previous results in the thin-film LN platform. Our ultra-high-linearity LN modulators could become a core building block for future large-scale functional microwave photonic integrated circuits by further integration with other high-performance components like low-loss delay lines, tunable filters, and phase shifters available on the LN platform. © 2022 Chinese Laser Press
Original language | English |
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Pages (from-to) | 2366-2373 |
Journal | Photonics Research |
Volume | 10 |
Issue number | 10 |
Online published | 27 Sept 2022 |
DOIs | |
Publication status | Published - 1 Oct 2022 |
Funding
National Natural Science Foundation of China (61922092); Research Grants Council, University Grants Committee (CityU 11204820, CityU 21208219, N_CityU113/20); Croucher Foundation (9509005); City University of Hong Kong (9610402, 9610455).
Publisher's Copyright Statement
- COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: Feng, H., Zhang, K., Sun, W., Ren, Y., Zhang, Y., Zhang, W., & Wang, C. (2022). Ultra-high-linearity integrated lithium niobate electro-optic modulators. Photonics Research, 10(10), 2366-2373. https://doi.org/10.1364/PRJ.464650. © 2022 Chinese Laser Press.
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