TY - JOUR
T1 - Beamlike photon pairs entangled by a 2×2 fiber
AU - Lo, Hsin Pin
AU - Yabushita, Atsushi
AU - Luo, Chih-Wei
AU - Chen, Pochung
AU - Kobayashi, Takayoshi
PY - 2011/8
Y1 - 2011/8
N2 - Polarization-entangled photon pairs have been widely used as a light source of quantum communication. The polarization-entangled photon pairs are generally obtained at the crossing points of the light cones that are generated from a type-II nonlinear crystal. However, it is hard to pick up the photon pairs coming out from the crossing points because of their invisible wavelength and low intensity. In our previous work, we succeeded in generating polarization-entangled photon pairs by overlapping two light paths for the photon-pair generation. The photon pairs could be entangled in all of the generated photon pairs without clipping the crossing points, even with some difficulty in its alignment to overlap the two light paths. In this paper, we have developed an optical system which generates polarization-entangled photon pairs using a beamlike photon pair, without the difficulty in alignment. The measured results show that the photon pairs generated in the system are entangled in their polarizations.
AB - Polarization-entangled photon pairs have been widely used as a light source of quantum communication. The polarization-entangled photon pairs are generally obtained at the crossing points of the light cones that are generated from a type-II nonlinear crystal. However, it is hard to pick up the photon pairs coming out from the crossing points because of their invisible wavelength and low intensity. In our previous work, we succeeded in generating polarization-entangled photon pairs by overlapping two light paths for the photon-pair generation. The photon pairs could be entangled in all of the generated photon pairs without clipping the crossing points, even with some difficulty in its alignment to overlap the two light paths. In this paper, we have developed an optical system which generates polarization-entangled photon pairs using a beamlike photon pair, without the difficulty in alignment. The measured results show that the photon pairs generated in the system are entangled in their polarizations.
UR - http://www.scopus.com/inward/record.url?scp=79961105161&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.84.022301
DO - 10.1103/PhysRevA.84.022301
M3 - Article
AN - SCOPUS:79961105161
VL - 84
SP - 1
EP - 5
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 2469-9926
IS - 2
M1 - 022301
ER -