Phase-stable source of polarization-entangled photons in a linear double-pass configuration
Year: 2013
Type: article
Abstract: We demonstrate a compact, robust, and highly efficient source of polarization-entangled photons, based on linear bi-directional down-conversion in a novel 'folded sandwich' configuration. Bi-directionally pumping a single periodically poled KTiOPO(4) (ppKTP) crystal with a 405-nm laser diode, we generate entangled photon pairs at the non-degenerate wavelengths 784 nm (signal) and 839 nm (idler), and achieve an unprecedented detection rate of 11.8 kcps for 10.4 μW of pump power (1.1 million pairs / mW), in a 2.9-nm bandwidth, while maintaining a very high two-photon entanglement quality, with a Bell-state fidelity of 99.3 ± 0.3%.
Source: Optics Express
DOI: 10.1364/oe.21.011943
Authors: Fabian Steinlechner, Sven Ramelow, Marc Jofre, Marta Gilaberte, Thomas Jennewein, Juan. P. Torres, Morgan W. Mitchell, Valerio Pruneri
Institution: Institute of Photonic Sciences
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
OpenAlex ID: W2070767745