To move beyond dedicated links and networks, quantum communications signals must be
integrated into networks carrying classical optical channels at power levels many orders of …

We report a telecom-band single-photon detector for gigahertz clocked quantum key
distribution systems. The single-photon detector is based on a sinusoidally gated …

The full time-jitter response of a single-photon detector can make a significant contribution to
the quantum bit error rate (QBER) of high repetition rate quantum key distribution (QKD) …

Quantum cryptography is a promising solution towards absolute security in long term
cryptosystems. While the use of quantum cryptography in fiber optical networks gets …

We report a proof-of-principle realization of a decoy-state BB84 quantum key distribution
(QKD) protocol with phase encoding over a record-breaking 17 km of multimode fiber (MMF) …

Ultrashort pulse sources are complex and resource-intensive. To reduce overhead and
simplify operations, we had previously developed a method to deliver ultra-short pulses …

Quantum cryptography is considered as a promising solution towards absolute security in
long-term cryptosystems. While the application of quantum cryptography in fiber networks …

Mode-division multiplexing using multimode optical fibers has been intensively studied in
recent years, in order to alleviate the transmission capacity crunch. Moreover, the need for …

We report balanced InGaAs/InP single photon avalanche diodes (SPADs) operated in
sinusoidal gating mode with a tunable phase shifter to reduce common mode noise. This …

Ultrashort optical pulse sources are often complex and resource-intensive, and thus,
delivering pulses to multiple satellite locations over a fiber-optic network dynamically from a …