A5018801371- Quantum Information and Cryptography
- Radio Frequency Integrated Circuit Design
- Quantum Computing Algorithms and Architecture
- Quantum optics and atomic interactions
- Quantum Mechanics and Applications
- GaN-based semiconductor devices and materials
- Advanced Power Amplifier Design
- Molecular Communication and Nanonetworks
Electronics and Telecommunications Research Institute
2024
This study focuses on the design and validation of an internally matched high-power amplifier monolithic microwave integrated circuit (MMIC) for Ku-band solid-state power (SSPA) system integration. The designed MMIC exhibits sufficient gain output characteristics, making it suitable SSPA applications. offers a compact cost-effective configuration by reducing number components, such as blocks, isolators, combiners. results show performance more than 40 W with considerably high saturated...
Abstract In this study, we report a transmitter system for free‐space quantum key distribution (QKD) using the BB84 protocol, which does not require an internal alignment process, by wavelength‐division multiplexing (WDM) filter and polarization‐encoding module. With custom‐made WDM filter, signals required QKD can be integrated simply connecting fibers, thus avoiding laborious systems conventional bulk‐optic setups. The is designed to multiplex single‐mode from 785‐nm 1550‐nm...
Abstract Polarization‐dependent loss (PDL) poses a critical challenge in implementing free‐space quantum key distribution (QKD) systems. This study investigated the theoretical and experimental impact of PDL on polarization‐encoded qubits experimentally demonstrated method to mitigate these effects. The proposed compensation could effectively restore integrity polarization states, enhancing robustness security QKD Specifically, secret rate 94.01% be recovered with 5 dB PDL. contributes...