Light source configured to emit a pair of polarization-entangled photons, comprising: o a substrate comprising a reflective layer; o a photonic wire comprising a core having a refractive index n c and: • being arranged on the substrate, facing the reflective layer, and extending longitudinally along a principal axis Δ substantially orthogonal to the plane of the substrate; • comprising an emitter configured to emit a pair of photons which are intended to be entangled in polarization; • having transverse dimensions, in a plane parallel to the substrate and containing the emitter, such that the core forms a single-mode waveguide for the emitted photons, the guided optical mode being degenerate in polarization; • these transverse dimensions varying longitudinally in the direction of an upper end (21.2) of the core so as to form a mode adapter for the guided optical mode; o an optical excitation device configured to excite the emitter and thus cause spontaneous emission of at least one pair of photons by the emitter; in which light source the photonic wire furthermore comprising a cladding: • having a refractive index n g less than n c; • extending in a plane parallel to the substrate, starting from the core, and having a maximum dimension with respect to the principal axis Δ defining a principal transverse axis At g such that it has an asymmetry of revolution about the principal axis Δ; the light source further comprising: o a correction device configured to induce by electrostatic effect a mechanical deformation of the photonic wire in a plane parallel to the substrate, along a deformation axis Ad forming an angle of inclination of between 0° and 90°, these values being exclusive, with respect to the principal transverse axis At g, the mechanical deformation leading to mechanical strains experienced by the emitter, thus improving the degree of entanglement of the photon pair. o a substrate comprising a reflective layer; o a photonic wire comprising a core having a refractive index n c and: • being arranged on the substrate, facing the reflective layer, and extending longitudinally along a principal axis Δ substantially orthogonal to the plane of the substrate; • comprising an emitter configured to emit a pair of photons which are intended to be entangled in polarization; • having transverse dimensions, in a plane parallel to the substrate and containing the emitter, such that the core forms a single-mode waveguide for the emitted photons, the guided optical mode being degenerate in polarization; • these transverse dimensions varying longitudinally in the direction of an upper end (21.2) of the core so as to form a mode adapter for the guided optical mode; • being arranged on the substrate, facing the reflective layer, and extending longitudinally along a principal axis Δ substantially orthogonal to the plane of the substrate; • comprising an emitter configured to emit a pair of photons which are intended to be entangled in polarization; • having transverse dimensions, in a plane parallel to the substrate and containing the emitter, such that the core forms a single-mode waveguide for the emitted photons, the guided optical mode being degenerate in polarization; • these transverse dimensions varying longitudinally in the direction of an upper end (21.2) of the core so as to form a mode adapter for the guided optical mode; o an optical excitation device configured to excite the emitter and thus cause spontaneous emission of at least one pair of photons by the emitter; in which light source the photonic wire furthermore comprising a cladding: • having a refractive index n g less than n c; • extending in a plane parallel to the substrate, starting from the core, and having a maximum dimension with respect to the principal axis Δ defining a principal transverse axis At g such that it has an asymmetry of revolution about the principal axis Δ; the light source further comprising: o a correction device configured to induce by electrostatic effect a mechanical deformation of the photonic wire in a plane parallel to the substrate, along a deformation axis Ad forming an angle of inclination of between 0° and 90°, these values being exclusive, with respect to the principal transverse axis At g, the mechanical deformation leading to mechanical strains experienced by the emitter, thus improving the degree of entanglement of the photon pair. • having a refractive index n g less than n c; • extending in a plane parallel to the substrate, starting from the core, and having a maximum dimension with respect to the principal axis Δ defining a principal transverse axis At g such that it has an asymmetry of revolution about the principal axis Δ; the light source further comprising: o a correction device configured to induce by electrostatic effect a mechanical deformation of the photonic wire in a plane parallel to the substrate, along a deformation axis Ad forming an angle of inclination of between 0° and 90°, these values being exclusive, with respect to the principal transverse axis At g, the mechanical deformation leading to mechanical strains experienced by the emitter, thus improving the degree of entanglement of the photon pair.