Silicon photonic microresonator-based high-resolution line-by-line pulse shaping

作者：Lucas M. Cohen, Kaiyi Wu, Karthik V. Myilswamy, Saleha Fatema, Navin B. Lingaraju, Andrew M. Weiner · 发表于：Nature Communications · 年份：2024 · DOI：10.1038/s41467-024-52051-9 · 被引用次数：23 · 研究领域：Advanced Fiber Laser Technologies、Photonic and Optical Devices、Advanced Photonic Communication Systems

Optical pulse shaping stands as a formidable technique in ultrafast optics, radio-frequency photonics, and quantum communications. While existing systems rely on bulk optics or integrated platforms with planar waveguide sections for spatial dispersion, they face limitations in achieving finer (few- or sub-GHz) spectrum control. These methods either demand considerable space or suffer from pronounced phase errors and optical losses when assembled to achieve fine resolution. Addressing these challenges, we present a foundry-fabricated six-channel silicon photonic shaper using microresonator filter banks with inline phase control and high spectral resolution. Leveraging existing comb-based spectroscopic techniques, we devise a system to mitigate thermal crosstalk and enable the versatile use of our on-chip shaper. Our results demonstrate the shaper's ability to phase-compensate six comb lines at tunable channel spacings of 3, 4, and 5 GHz. Specifically, at a 3 GHz channel spacing, we showcase the generation of arbitrary waveforms in the time domain. This scalable design and control scheme holds promise in meeting future demands for high-precision spectral shaping capabilities.