  Semiconductor Bragg-reflection waveguides are well-established sources of
correlated photon pairs as well as promising candidates for building up
integrated quantum optics devices. Here, we use such a source with optimized
non-linearity for preparing time-bin entangled photons in the telecommunication
wavelength range. By taking advantage of pulsed state preparation and efficient
free-running single-photon detection, we drive our source at low pump powers,
which results in a strong photon-pair correlation. The tomographic
reconstruction of the state's density matrix reveals that our source exhibits a
high degree of entanglement. We extract a concurrence of $88.9\pm 1.8\%$ and a
fidelity of $94.2 \pm 0.9\%$ with respect to a Bell state.
