In recent years, standard CMOS microprocessors have approached their maximum power dissipation per unit area, effectively placing a limit on computational power. This highlights the urgent need to explore alternative technologies. One promising avenue is the use of superconductors, which demonstrate zero resistivity below a critical temperature. However, circuits based on superconductors necessitate the use of cryostats to maintain low temperatures, presenting challenges in data transfer with the room temperature environment. While coaxial cables are often employed for this purpose, they suffer from limited data transfer rates and contribute significantly to heat load. On the contrary, photonics integrated circuits (PICs) coupled with optical fibers present a viable solution. They enable scalable, cost-effective, and power-efficient optical interconnections capable of supporting high data transfer rates while minimizing heat transfer. In this presentation, We will discuss the latest advancements in cryogenic PICs, focusing on their application in interfacing with cryogenic computing systems such as single-flux-quantum logic circuits and superconducting qubits.
Advancements in communication and quantum computing have led to the need for efficient quantum networks. Superconducting qubits are vital for quantum computation and require converting microwave states to optical states for long-distance communication. However, current coupling techniques suffer from high photon loss and scattering, hindering their efficiency. A fiber-to-chip coupler (FCC) is essential to achieve high coupling efficiency. To address this, a novel high refractive index lens (1.85 refractive index at 1550 nm) imprinted on a fiber end facet is proposed, enabling efficient light coupling to a waveguide. This approach allows shorter wavelengths due to the operation of the lens in the bonding medium, resulting in superior coupling efficiency. The new method aims to develop a robust packaging process for quantum communication networks that can operate at the millikelvin level.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.