Ultrafast Nonlinear Microphotonics

Ultrafast Microphotonics Lab

In the Ultrafast Microphotnics Lab, we work at the intersection of ultrafast optics and integrated photonics. We explore nonlinear optical processes enabled by the tight confinement of light in micro- and nano-structured photonic devices to create novel chip-integrated light sources for emerging application in science and technology.

To learn more about our research, please visit our research page.

News

Supercontinuum generation in integrated GaN waveguides

20 August 2024

Supercontinuum in integrated GaN waveguides is demonstrated for the first time. We observe gap-free spectra spanning more than two octaves and extending into the mid-infrared to wavelengths approaching 4 µm. The waveguides are pumped by a robust off-the-shelf erbium-based femtosecond laser with sub-nJ pulse energies and also allow f-2f self-referencing for precision spectroscopy.

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Self-injection-locked microcombs via synthetic reflection

15 January 2024

Self-injection locking to a photonic crystal ring-microresonator with synthetic reflection is demonstrated for the first time. The chip-integrated system does not rely on random imperfection-based backscattering and permits deterministic generation of single-soliton microcombs.

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Sideband injection locking in microresonator frequency combs

12 December 2023

For many applications of microresonator frequency combs, the ability to control the comb's defining parameters is essential. Sideband-injection locking, a technique by which a secondary continuous-wave laser is injected into the microresonator, provides an elegant solution, enabling straightforward control of both the carrier-envelope offset frequency and repetition rate.

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