>But by using entangled photons, the quantum photonic-dimer laser can maintain precision and strength over greater distances and in adverse conditions, the scientists said in a statement.
This makes me think the "photonic-dimer laser" has very narrow linewidth/extremely long coherence length, but also at very high power. There's usually a big tradeoff between laser power and spectral purity. A laser with a longer coherence length has favourable beam characteristics which allow it to be less divergent and less susceptible to diffraction from the atmosphere. The ideal propagation characteristics combined with the high output power is the story I guess.
Quantum entanglement contributes to the longer coherence length, which I guess could described poetically as photons protecting each other...