Kerstin Worhoff

TL;DR: In this article, laser operation was achieved in microstructured channel waveguides of WO4)2:Gd3+, Lu3+, Yb3+, resulting in a threshold of only 5 mW, a slope efficiency of 62% versus launched pump power, and 76 mW output power.

TL;DR: 3D-printed coupling elements based on 3D- printed freeform coupling elements that fit into deep-etched dicing trenches on the wafer surface represent a key step towards highly reproducible wafer-level testing of edge-coupled photonic integrated circuits.

TL;DR: The growth of silicon oxynitride thin films applying remote inductively coupled, plasma-enhanced chemical vapor deposition is optimized toward high optical quality at a deposition temperature as low as 150°C, showing the application perspective for three-dimensional integrated optoelectronic chips.

TL;DR: In this paper, the authors present an interface for hybrid flip-chip integration of InP-based laser sources to silicon-nitride-based photonic platforms, which enables efficient high optical power coupling over a wide temperature range.

TL;DR: In this paper, the fabrication and properties of reactively co-sputtered $AL 2 O 3 ) layers are presented, being a very promising host material for active integrated optics applications such as rare-earth ion doped laser devices.