Wenle Weng

Nano-Kelvin Thermometry and Temperature Control: Beyond the Thermal Noise Limit

Publisher: American Physical Society (APS)

Date: 21-04-2014

DOI: 10.1103/PHYSREVLETT.112.160801

Stabilization of a dynamically unstable opto-thermo-mechanical oscillator

Publisher: American Physical Society (APS)

Date: 06-2015

DOI: 10.1103/PHYSREVA.91.063801

Platicon microcomb generation using laser self-injection locking

Publisher: Springer Science and Business Media LLC

Date: 04-2022

DOI: 10.1038/S41467-022-29431-0

Abstract: The past decade has witnessed major advances in the development and system-level applications of photonic integrated microcombs, that are coherent, broadband optical frequency combs with repetition rates in the millimeter-wave to terahertz domain. Most of these advances are based on harnessing of dissipative Kerr solitons (DKS) in microresonators with anomalous group velocity dispersion (GVD). However, microcombs can also be generated with normal GVD using localized structures that are referred to as dark pulses, switching waves or platicons. Compared with DKS microcombs that require specific designs and fabrication techniques for dispersion engineering, platicon microcombs can be readily built using CMOS-compatible platforms such as thin-film (i.e., thickness below 300 nm) silicon nitride with normal GVD. Here, we use laser self-injection locking to demonstrate a fully integrated platicon microcomb operating at a microwave K-band repetition rate. A distributed feedback (DFB) laser edge-coupled to a Si 3 N 4 chip is self-injection-locked to a high- Q ( 10 7 ) microresonator with high confinement waveguides, and directly excites platicons without sophisticated active control. We demonstrate multi-platicon states and switching, perform optical feedback phase study and characterize the phase noise of the K-band platicon repetition rate and the pump laser. Laser self-injection-locked platicons could facilitate the wide adoption of microcombs as a building block in photonic integrated circuits via commercial foundry service.

Discovery Early Career Researcher Award - Grant ID: DE210101904

Start Date: 07-2021

End Date: 12-2024

Amount: $385,322.00

Funder: Australian Research Council

Linkage Infrastructure, Equipment And Facilities - Grant ID: LE230100005

Start Date: 2023

End Date: 12-2023

Amount: $852,787.00

Funder: Australian Research Council