Title:
INTERFERENCE DEVICE, POLARIZATION CONTROL METHOD, AND POLARIZATION CONTROL PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/100668
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an interference device capable of suppressing a deterioration in the quantum property of quantum light the quality of information of which deteriorates due to light loss, a polarization control method, and a polarization control program. An interference device (101) according to the present invention comprises: a first waveguide (51a) through which first quantum light (SL1) is transmitted and from which the first quantum light is outputted; a second waveguide (51b) through which second quantum light (SL2) is transmitted and from which the second quantum light is outputted; a first beam splitter (BS21) which generates first interference light and second interference light from the first quantum light in a first polarization state outputted from the first waveguide and the second quantum light in a second polarization state outputted from the second waveguide; and a first polarization state change unit (31a) which applies first action to the first waveguide to change the first polarization state to a third polarization state by birefringence based on the first action. The quantum light is light the quality of information of which deteriorates due to light loss.
Inventors:
FURUSAWA AKIRA (JP)
NAKAMURA TOMOHIRO (JP)
NAKAMURA TOMOHIRO (JP)
Application Number:
PCT/JP2022/042669
Publication Date:
June 08, 2023
Filing Date:
November 17, 2022
Export Citation:
Assignee:
UNIV TOKYO (JP)
International Classes:
G02F3/00
Domestic Patent References:
| WO2017064749A1 | 2017-04-20 |
Foreign References:
| US6430345B1 | 2002-08-06 | |||
| US5440414A | 1995-08-08 |
Other References:
G. B. XAVIER AND J. P. VON DER WEID: "table single-photon interference in a 1 km fiber-optic Mach-Zehnder interferometer with continuous phase adjustment", OPTICS LETTERS, OPTICAL SOCIETY OF AMERICA, US, vol. 36, no. 10, 15 May 2011 (2011-05-15), US , pages 1764 - 1766, XP001563160, ISSN: 0146-9592, DOI: 10.1364/OL.36.001764
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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