TY - JOUR
T1 - Short interference fringe and high event rate of two-photon interference using up-converted photon pairs
AU - Syouji, Atsushi
AU - Shimizu, Ryosuke
AU - Nagano, Shigehiro
AU - Suizu, Koji
AU - Edamatsu, Keiichi
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Creative Scientific Research (17GS1204) from the Japan Society for the Promotion of Science.
Publisher Copyright:
© 2023 The Japan Society of Applied Physics.
PY - 2023/2/1
Y1 - 2023/2/1
N2 - We demonstrate a hybrid approach to detecting a short fringe period of two-photon interference with high brightness, by combining spontaneous parametric down-conversion (SPDC) and up-conversion techniques. Photon pairs were generated at the wavelength of 1550 nm via SPDC, and converted to 516.7 nm through up-conversion process with the pump light 775 nm in efficiency ∼90%. The two-photon interference of the up-converted photon pairs exhibited a fringe period of 258.3 nm with high event rate (∼2000 counts s−1), which was 6 times shorter than the original wavelength, demonstrating that the energy-time correlation of the photon pairs was preserved. The technique simultaneously provides short fringe period beyond the classical limit and high brightness of the photon pairs.
AB - We demonstrate a hybrid approach to detecting a short fringe period of two-photon interference with high brightness, by combining spontaneous parametric down-conversion (SPDC) and up-conversion techniques. Photon pairs were generated at the wavelength of 1550 nm via SPDC, and converted to 516.7 nm through up-conversion process with the pump light 775 nm in efficiency ∼90%. The two-photon interference of the up-converted photon pairs exhibited a fringe period of 258.3 nm with high event rate (∼2000 counts s−1), which was 6 times shorter than the original wavelength, demonstrating that the energy-time correlation of the photon pairs was preserved. The technique simultaneously provides short fringe period beyond the classical limit and high brightness of the photon pairs.
KW - photon pairs
KW - two-photon interference
KW - up-conversion
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U2 - 10.35848/1347-4065/acb874
DO - 10.35848/1347-4065/acb874
M3 - Article
AN - SCOPUS:85148669934
SN - 0021-4922
VL - 62
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - 2
M1 - 022003
ER -