Component-wise testing of laser-written integrated coupled-mode beam splitters

Femtosecond laser-inscribed optical waveguides in dielectric crystals: a concise review and recent advances

“…Although various laser-written 3D structures have been successfully fabricated in glass, 34,[173][174][175][176][177] the complexity of lattice and anisotropies make it much difficult to manipulate in crystals. Special designs are, therefore, required by varying the writing parameters and track geometries.…”

Ultrafast laser writing quill effect in low loss waveguide fabrication regime

“…4, from a three-dimensional tritter, which was written in Corning EAGLE 2000 glass with our optimized writing parameter for this kind of component: 85 nJ pulse energy and 2 mm/s scan speed, one can see the quill effect in particular at the lower regions (highlighted by dot-dashed rectangles) of the three coupling waveguides W1, 2 and 3. More importantly this quill effect will affect the beamsplitting ratio of the tritter due to the fact that quill effect will effectively result in a shift of the as-built relative positions between the three coupling waveguides compared with the design values, as we demonstrated in reference [31]. Since the output beamsplitting ratio of a tritter is very sensitive to the relative positions between three coupling waveguides at its coupling region.…”

Self-consistent state and measurement tomography with fewer measurements

“…Such circuits have been used to perform Boson sampling [34], teleportation [35], quantum state synthesis [36], quantum simulation [37], and quantum logic operations [31]. PICs are often characterized using classical optics [32,35,38].…”