公开(公告)号：US20240152026A1

公开(公告)日：2024-05-09

申请号：US18548393

申请日：2022-03-04

Applicant: Kyoto University

Inventor： Shigeki TAKEUCHI ,  Hideaki TAKASHIMA ,  Yu MUKAI

IPC: G02F1/39 ,  G01J3/02 ,  G01J3/10 ,  G01J3/453

CPC classification number: G02F1/395 ,  G01J3/0218 ,  G01J3/10 ,  G01J3/453

Abstract: A quantum absorption spectroscopy system (1) includes a pump light source (11), a quantum interferometer (21), and a spectroscope (31). The pump light source (11) emits pump light. The quantum interferometer (21) causes quantum interference between a plurality of physical processes in which a quantum entanglement photon pair of a signal photon and an idler photon is generated through spontaneous parametric down-conversion of the pump light, a sample being arranged on a propagation path of the idler photon. The spectroscope (31) detects a signal photon from the quantum interferometer (21). The quantum interferometer (21) includes a single mode fiber (SMF) portion optically coupled to at least part of a propagation path of the signal photon and the propagation path of the idler photon.