Abstract-Towards subterahertz bandwidth ultracompact lithium niobate electrooptic modulators

Amirmahdi Honardoost, Farzaneh Arab Juneghani, Reza Safian, and Sasan Fathpour

Fig. 1 (a) 3-D schematic of the thin-film LN MZ EOMs; (b) Cross-section of the EOMs in the lateral y-z plane. The zoomed section shows the misalignment (ΔD = D2 – D1) of the rib’s center (D1) from the middle of the gap between the electrodes (D2).

https://www.osapublishing.org/oe/abstract.cfm?uri=oe-27-5-6495

Achieving ultrahigh-speed electro-optic modulators (subterahertz modulation bandwidths) is shown to be feasible in the thin-film lithium niobate integrated photonic platform. Design guidelines for optimization of the main radio-frequency and optical parameters are presented, and 3-dB modulation bandwidth up to 400 GHz is proved attainable in 3-mm-long devices. Such unprecedented bandwidths pave the path towards utilizing the devices in advanced optical communication systems.

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