2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/138901We show that the quantum interference between downconverted photon pairs and photons from coherent laser light can produce a maximally path entangled N-photon output component with a fidelity greater than 90% for arbitrarily high photon numbers. A simple beam splitter operation can thus transform the 2-photon coherence of down-converted light into an almost optimal N-photon coherence.5 pages, including 2 figures and 1 table, final version for publication as rapid communication in Phys. Rev. AQuantum Physicstext