White-light interferometry is one of today’s most precise tools for determining the properties of optical materials.Its achievable precision and accuracy are typically limited by systematic errors due to a high numbe...White-light interferometry is one of today’s most precise tools for determining the properties of optical materials.Its achievable precision and accuracy are typically limited by systematic errors due to a high number of interdependent data-fitting parameters.Here,we introduce spectrally resolved quantum white-light interferometry as a novel tool for optical property measurements,notably,chromatic dispersion in optical fibres.By exploiting both spectral and photon-number correlations of energy-time entangled photon pairs,the number of fitting parameters is significantly reduced,which eliminates systematic errors and leads to an absolute determination of the material parameter.By comparing the quantum method to state-of-the-art approaches,we demonstrate the quantum advantage of 2.4 times better measurement precision,despite requiring 62 times fewer photons.The improved results are due to conceptual advantages enabled by quantum optics,which are likely to define new standards in experimental methods for characterising optical materials.展开更多
基金support from the Foundation Simone&Cino Del Duca,the European Commission for the FP7-ITN PICQUE project(Grant Agreement No.608062)l’Agence Nationale de la Recherche(ANR)for the CONNEQT,SPOCQ and SITQOM projects(Grants ANR-EMMA-002-01,ANR-14-CE32-0019 and ANR-15-CE24-0005,respectively)the iXCore Research Foundation.
文摘White-light interferometry is one of today’s most precise tools for determining the properties of optical materials.Its achievable precision and accuracy are typically limited by systematic errors due to a high number of interdependent data-fitting parameters.Here,we introduce spectrally resolved quantum white-light interferometry as a novel tool for optical property measurements,notably,chromatic dispersion in optical fibres.By exploiting both spectral and photon-number correlations of energy-time entangled photon pairs,the number of fitting parameters is significantly reduced,which eliminates systematic errors and leads to an absolute determination of the material parameter.By comparing the quantum method to state-of-the-art approaches,we demonstrate the quantum advantage of 2.4 times better measurement precision,despite requiring 62 times fewer photons.The improved results are due to conceptual advantages enabled by quantum optics,which are likely to define new standards in experimental methods for characterising optical materials.
