Featured Application The results of this paper provide a reference for the future design of a
quantum-secured 5G/B5G optical edge layer, assisted by novel integration strategies of …

A compact setup for two-way single-photon-level frequency conversion between 852? nm
and 1560? nm has been implemented with the same periodically-poled magnesium-oxide …

In this paper, we demonstrate integrated photonic chips for multichannel quantum frequency
conversion (QFC) based on reverse-proton-exchange periodically poled lithium niobate …

By engineering and manipulating quantum entanglement between incoming photons and
experimental apparatus, we construct single-photon detectors which cannot distinguish …

Quantum key distribution (QKD), the distribution of quantum secured keys useful for data
encryption, is expected to have a crucial impact in the next decades. However, despite the …

We experimentally demonstrated a high-performance frequency upconversion detector for
telecom-band photons based on a passively synchronized fiber laser system. The involved …

The quantum communication channel is considered to be eavesdropped when the signal
Quantum Bit Error Rate (QBER) exceeds a defined theoretical limit and is thus considered a …

As a novel technique for infrared detection, frequency upconversion has been successfully
deployed in many applications. However, investigations into the noise properties of …

Phase matching is crucial for effective nonlinear frequency conversion. Recent advances in
photonic miniaturization greatly promote implementations of efficient nonlinear frequency …

The scope of this thesis is the development of efficient and low-background polarization-
preserving quantum frequency converters (PPQFC) and their integration into trapped-atom …