Ya Cheng

Temporal focusing enables distortion-resistant high-intensity spatiotemporal optical vortices

Spatiotemporal optical vortices (STOVs) carry transverse orbital angular momentum and offer new degrees of freedom for light-matter interactions. Yet conventional focusing techniques for STOVs introduce spatiotemporal imbalance between spatial diffraction and temporal dispersion,...

High-gain packaged Ytterbium-doped thin-film lithium niobate large-mode-area waveguide amplifier

We report a high-gain packaged Ytterbium-doped large-mode-area waveguide amplifier based on the thin-film lithium niobate platform. Under bi-directional 976 nm pumping, the amplifier delivers a robust fiber-to-fiber net gain of 13.5 dB at 1060 nm and 6.0 dB at 1030 nm for a −10 d...