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Broadband, high-linearity TFLN electro-optic modulator for integrated microwave photonics using reconfigurable
Optics Express
|August 13, 2025
Summary
This study introduces a novel thin-film lithium niobate electro-optic modulator for high-fidelity broadband signal transmission. The device achieves excellent spurious-free dynamic range, large bandwidth, and low driving voltage for advanced integrated microwave photonic systems.
Area of Science:
- Photonics
- Materials Science
- Electrical Engineering
Background:
- Integrated electro-optic modulators are crucial for high-fidelity broadband signal transmission in integrated microwave photonic (IMWP) links.
- Achieving large bandwidth, high linearity, and low driving voltage simultaneously remains a challenge.
Purpose of the Study:
- To propose and demonstrate a novel thin-film lithium niobate electro-optic modulator.
- To achieve a high spurious-free dynamic range (SFDR) with large bandwidth and low half-wave voltage.
Main Methods:
- Utilized a thin-film lithium niobate platform.
- Incorporated a thermo-optic reconfigurable coupler.
- Employed a dual-parallel Mach-Zehnder modulation scheme.
Main Results:
- Demonstrated a spurious-free dynamic range of 112.87/107.71 dB·Hz2/3 at 1/10 GHz.
- Achieved a large bandwidth exceeding 67 GHz.
- Maintained a low half-wave voltage of 2.7 V.
Conclusions:
- The developed modulator offers a new pathway for high-performance electro-optic modulators.
- This device is suitable for future functional integrated microwave photonic systems.
- The simultaneous achievement of high SFDR, bandwidth, and low voltage is a significant advancement.
