Relaxed Tolerance Adiabatic Coupler for Optical Interconnects

Technology #ua17-132

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Stanley Pau
Professor, Optical Sciences
Thomas Koch
Dean, Professor, Optical Science
Robert Norwood
Professor, Optical Sciences
Erfan Fard
Graduate student, Optical Science
Managed By
Amy Phillips
Sr. Licensing Manager (520) 621-9579

Title:  Relaxed tolerance adiabatic coupler for optical interconnects


Invention Summary:  Researchers at the University of Arizona have designed an architecture for PICs using a waveguide design that reduces the size of the interconnections and overcomes the mode size mismatch.  The design also relaxes alignment tolerances and lower polarization dependence to allow for very fast manufacturing of the PIC interconnections.


Background:  An important problem in optical packaging involves the optical interconnection of photonic integrated circuits (PICs) for chip-chip connections and the connection of such circuits to the external world. PICs use waveguide components for the transformation of electrical signals to optical signals and vice versa.  Existing wire bonding techniques that have been successfully applied to electrical connections in electronic integrated circuits cannot be easily extended to optical connection in a photonic integrated circuit.  Even with optical to optical interconnects to fiber optics suffer from mode size mismatch, which greatly reduces the coupling efficiencies.



*  Higher coupling efficiency and lower signal losses

*  Relaxed alignment tolerances

*  Faster manufacturing

*  Short distance for inter-chip and optical printed circuit board connections



*  Telecommunications

*  Optical packaging


Contact:  Amy Phillips

refer to case number UA17-132