Date and Time: April 43, 2025, 15:30～16:30
Venue: Room 337A, 3rd Floor, Building 1, Faculty of Science, The University of Tokyo, and via ZOOM (Advance registration required for both)
Speaker: Assoc. Prof. Kasper Van Gasse
(Ghent University)
Title: Titanium-sapphire-on-insulator for on-chip solid-state laser technology
We will present the first chip-scale monocrystalline waveguide titanium:sapphire (Ti:sapphire) laser and amplifier platform. With this technology a new step can be taken in the miniaturization of Ti:sapphire laser systems, traditionally known for their bulkiness, high cost, and large power requirements. Using a titanium:sapphire-on-insulator (Ti:SaOI) platform, we demonstrate a submilliwatt-threshold whispering-gallery-mode laser and a broadband waveguide amplifier with 1 kW peak output power. Our integrated amplifier achieves distortion-free amplification of picosecond pulses and supports unprecedented broadband gain from 650 to 1100 nm. Furthermore, we realize a fully tunable Ti:sapphire laser occupying less than 0.15 mm², which can be pumped with low-cost green laser diodes. These results represent a three-orders-of-magnitude reduction in cost and footprint compared to traditional systems. Moreover, we use a Ti:SaOI laser array to control a solidstate SiC cavity quantum electrodynamics experiment with artificial atoms in silicon carbide. This work enables for the first time scalable Ti:sapphire arrays for quantum optics, metrology, and biomedical applications.
I will discuss also my broader vision of integrated solid-state lasers for next-generation photonic systems and how this work is now continuing at Ghent University and imec through the ERC Starting Grant project LASIQ.
Language: English
Host Fqaculty Member:Takuro IDEGUCHI
Registration:
Please register via the Google Form (link below). The Zoom URL will be sent to the email address you provide prior to the event.
Google forms
Contact:
sec-utripl@utripl.u-tokyo.ac.jp
Note: This seminar is open to the public, but we ask all participants to provide their name, affiliation, and email address for record-keeping purposes.