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This is a Experimental Study study.

September 19, 2025

A chip-integrated comb-based microwave oscillator

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Demonstration of a chip-integrated microwave oscillator incorporating a DFB laser and Si3N4 microresonator, highlighting its compact footprint.

This microcomb-based microwave oscillator operates at 10.7 GHz, showing promising capabilities.
The integrated device incorporates a high-power DFB laser and an ultralow-loss Si3N4 microresonator.
Compact design leads to a chip footprint of only 76 mm², which allows for efficient space utilization.
Hybrid integration enhances the performance of the microwave oscillator and supports advanced applications.

Sun et al. (2025) studied this question.

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Demonstration of a chip-integrated microwave oscillator incorporating a DFB laser and Si3N4 microresonator, highlighting its compact footprint.