Abstract
In recent years, technologies on quantum-entangled photon pairs have made significant progress. This
paper introduces applications of quantum entangled photon pairs in optical sensing. The first example is
quantum optical coherence tomography with the tolerance for the effect of dispersion in the medium,
which has been an obstacle to the high resolution of conventional optical coherence tomography. The
second example is quantum infrared spectroscopy. This technology enables infrared spectroscopy with a
visible detector. The latest status of our recent works on the above-mentioned photonic quantum sensing
using entangled photons will be reviewed.
