Femtosecond Laser Direct Writing of Optical Overpass

With the rapid increase in information density, problems such as signal crosstalk and crossover restrict the further expansion of chip integration levels and packaging density. Based on this, a novel waveguide structure-photonic jumper wire-is proposed here to break through the technical restrictions in waveguide crossing and parallel line wrapping, which hinder the integration of photonic chips. Furthermore, we fabricated the optical overpass to realize a more complex on-chip optical cross-connection. Our method and structure promote a series of practical schemes for improving optical chip integration.

Automated summary

With the increase in information density, signal crosstalk and crossover pose challenges to the further development of chip integration and packaging density. This study proposes a novel waveguide structure, the photonic jumper wire, to overcome technical restrictions in waveguide crossing and parallel line wrapping, thereby enabling improved integration of photonic chips.