SPIM-WGs: High performance waveguide devices for next generation photonic chips

https://phys.org/news/2022-07-spim-wgs-high-waveguide-devices-photonic.html

"optical mode conversion for arbitrary shapes... diffraction limited size of fabricating laser focus. SPIM-WGs convert between Gaussian light, elliptical light, double lobe TE01, and ring TE01 modes... pp-KTP waveguides and single mode fiber, bridging quantum light sources and quantum chips.... pp-KTP waveguide connected to single-mode fiber... loses 25-30% light intensity... SPIM-WGs is used for the bridging, it is expected that the light intensity loss can be reduced below 10%"