  We demonstrate heralded qubit amplification for Time-Bin and Fock-state
qubits in an all-fibre, telecom-wavelength, scheme that highlights the
simplicity, the stability and potential for fully integrated photonic
solutions. Exploiting high-efficiency superconducting detectors, the gain, the
fidelity and the performance of the amplifier are studied as a function of
loss. We also demonstrate the first heralded Fock-state qubit amplifier without
post-selection. This provides a significant advance towards demonstrating
Device-Independent Quantum Key Distribution as well as fundamental tests of
quantum mechanics over extended distances.
