Fig. 5: Stability performance.
From: Efficient fibre-pigtailed source of indistinguishable single photons

(a,b) Stability over ten hours of the single-photon rate at the fibre output and photon indistinguishability and (c,d) corresponding histograms. (e) Standalone single-photon source system with interconnected modules dedicated to cryogenics, excitation and collection.