In this paper, we present a quantum-secured optical fronthaul architecture utilizing hollow-core fiber and propose op-timized wavelength allocation for classical and quantum channels, enhancing QKD ...

We present a mid-infrared optical parametric oscillator (OPO) with a high pump-to-idler conversion efficiency from 1.06 μm to 3.8 μm, which was quasi-synchronously pumped by a burstmode fiber laser.