Chip-scale high-performance photonic microwave oscillator

• DOI: 10.1126/sciadv.ado9570
• Publication Date: 2024-08-14T18:00:39Z
• Authors: Yang He; Long Cheng; Heming Wang; Yu Zhang; Roy Meade; Kerry Vahala; Mian Zhang; Jiang Li
• Keywords: Physical and Materials Sciences; Physics - Applied Physics; Physics - Optics

Optical frequency division based on bulk or fiber optics provides unprecedented spectral purity for microwave oscillators. To extend the applications of this approach, challenges are to develop miniaturized oscillators without trading off phase noise performance. Here, we report a chip-scale high-performance photonic oscillator integrated electro-optical division. Dual distributed-feedback lasers co-self-injection locked single silicon nitride spiral resonator provide record-high-stability, fully on-chip optical reference. An comb thin-film lithium niobate modulator chip is leveraged perform optical-to-microwave The resulting achieves record-low results represent major advance in high-performance, including signal processing, radar, timing, and coherent communications.