System Integration for Low-Loss Photonic Couplings

Foto: UHH/Rauchfuss

Interferometric quantum gates and directed laser beams for the control and manipulation of qubits necessitate adapted system solutions for low-loss optical couplers as interfaces to quantum computer hardware. Depending on requirements, these interfaces can be implemented in free space, via optical fibers or with special chip-to-chip connections. In this project, manufacturing and assembly techniques as well as packaging concepts are investigated. Wafer-scale fabrication technologies and maskless laser direct writing techniques are explored, with a focus on low-loss fiber-chip interfaces in optical thin films and embedded substrates.