Bright, single-spatial-mode source of frequency non-degenerate, polarization-entangled photon pairs using periodically poled KTP.
We use two perpendicular crystals of periodically-poled KTP to directly generate polarization-entangled photon pairs, the majority of which are emitted into a single Gaussian spatial mode. The signal and idler photons have wavelengths of 810 nm and 1550 nm, respectively, and the photon-pair generation rate is 1.2x107 sec-1 for a pump power of 62 mW. The apparatus is compact, flexible, and easily to use.
Pelton
Matthew
M
Marsden
Philip
P
Ljunggren
Daniel
D
Tengner
Maria
M
Karlsson
Anders
A
Fragemann
Anna
A
Canalias
Carlota
C
Laurell
Fredrik
F