High-Density Fiber-Optic Packaging for Cryogenic Applications

The field of quantum computing and networking is rapidly growing, with the need for reliable quantum memories that can interface with light for transferring quantum information. Such systems must be scalable and operate efficiently at cryogenic temperatures to maintain quantum coherence. Inconsistent performance or lack of integration with current photonic technologies could severely limit the practical application of quantum networking. Current quantum memory approaches often suffer from integration challenges and thermal instability, which lead to operational inefficiencies or loss of quantum information. Achieving seamless integration with photonic circuits while ensuring stability across a wide temperature range remains a critical hurdle. The lack of cryogenically stable interfaces for quantum emitters undermines the potential for broader quantum network implementations.

Technology Description

This technology introduces a quantum memory module that combines color-center quantum emitters within a diamond microchiplet. These emitters, such as silicon vacancies, have exceptional optical properties and scalable fabrication compatibility. The module notably includes integration with a silicon photonic integrated circuit (PIC), facilitating optical data transmission and processing. The entire assembly is anchored to a silicon bench using cryo-compatible epoxy, ensuring mechanical stability through various temperature changes, from room temperature to cryogenic levels. What sets this invention apart is its robust design that maintains consistency in performance at cryogenic temperatures—a critical requirement for functioning quantum networks. The specific configuration of the diamond microchiplet's color centers, when combined with the PIC, makes the system exceptionally network compatible. The V-groove array, which aligns optical fibers with waveguides on the PIC, benefits from fast-curing epoxy for rapid assembly and strong cryo-compatible epoxy for long-term stability. These features position the invention as an advanced solution for quantum information systems.