Abstract

We propose the generation of two-channel time-energy entangled twin photons based on two simultaneous first-order quasi-phase-matched (QPM) spontaneous parametric down-conversion processes in a periodically poled lithium niobate (PPLN) with a monochromatic pump. The theoretical model for the generation of the entangled photons is established, and the analytical solution is obtained in a lossless crystal with an undepleted pump assumption. The generated condition of entangled photons is achieved in terms of the QPM grating period and the pump wavelength. It is shown that two channels of entangled twin photons with different wavelengths can be created by suitably choosing the PPLN grating period once the pump wavelength is fixed, which provides the potential to introduce the wavelength division multiplexed technique into quantum information systems.

© 2008 Optical Society of America

Entangled photon generation in two-period quasi-phase-matched parametric down-conversion

Wakana Ueno, Fumihiro Kaneda, Hirofumi Suzuki, Shigehiro Nagano, Atsushi Syouji, Ryosuke Shimizu, Koji Suizu, and Keiichi Edamatsu
Opt. Express 20(5) 5508-5517 (2012)

Counterpropagating path-entangled photon pair sources based on simultaneous spontaneous parametric down-conversion processes of nonlinear photonic crystal

Can Yang, Chaoxiang Xi, Jietai Jing, and Guangqiang He
Opt. Express 26(21) 27945-27954 (2018)

Extended phase-matching properties of periodically poled potassium niobate crystals for mid-infrared polarization-entangled photon-pair generation

Kwang Jo Lee, Sunmi Lee, and Heedeuk Shin
Appl. Opt. 55(34) 9791-9796 (2016)

Prediction of multichannel polarization-entangled photon pairs in a single periodically poled lithium niobate with a monochromatic pump

Shiming Gao and Changxi Yang
Opt. Lett. 32(18) 2653-2655 (2007)

Direct generation of frequency-bin entangled photons via two-period quasi-phase-matched parametric downconversion

Fumihiro Kaneda, Hirofumi Suzuki, Ryosuke Shimizu, and Keiichi Edamatsu
Opt. Express 27(2) 1416-1424 (2019)