Paper 14093-45
Paper 14093-45
Straight Directional Couplers Enabled by High Refractive Index Contrast Femtosecond Laser-Written Waveguides
15 April 2026 • 11:15 - 11:30 CEST | Curie A (Niveau/Level 1)
Abstract
We demonstrate densely integrated photonic devices on glass substrates using adaptive optics-assisted femtosecond laser direct writing. By enhancing refractive index contrast (> 0.01), we achieve minimal crosstalk at waveguide spacings of 15 µm. Novel designs for fully straight directional couplers and interferometers are presented and experimentally verified at telecom wavelengths, enabling chip-scale integration without waveguide bends.
Presenter
Mohan Wang
Univ. of Oxford (United Kingdom)
Dr Mohan Wang is a Postdoctoral Researcher in the Dynamic Optics and Photonics Group, Department of Engineering Science at the University of Oxford, with a specialisation in laser micromachining of photonic devices and developing optical sensing technologies for extreme environments. Mohan received her PhD in Electrical Engineering from the University of Pittsburgh.