Quality of polarization entanglement in spontaneous parametric down conversion

¹ School of Microelectronics Engineering, Universiti Malaysia Perlis (UniMAP), 02600 Arau, Perlis, Malaysia
² Semiconductor Photonics & Integrated Lightwave Systems (SPILS), School of Microelectronic Engineering, Universiti Malaysia Perlis, Pauh Putra Main Campus, 02600 Arau, Perlis, Malaysia
³ Nano Photonics and Nano Electronics, Mimos Berhad, Technology Park Malaysia, 57000 Kuala Lumpur
⁴ Advanced Communication Engineering, Centre of Excellence-School of Computer and Communication Engineering, Universiti Malaysia Perlis
⁵ Department of Physics, Kulliyyah of Science, International Islamic University Malaysia, Jalan Sultan Ahmad Shah, Bandar Indera Mahkota 25200 Kuantan, Pahang.
⁶ Dept. of CS and Deputy Rector (Research and Innovation) at the International Islamic University Malaysia (IIUM)

^* Corresponding author: norshamsuri@unimap.edu.my

Published online: 22 November 2017

Abstract

We experimentally demonstrated a high degree of polarization entanglement known as entanglement visibility through spontaneous parametric down conversion process pumped by a femtosecond laser. The entangled-photon pair was obtained using two type-I BBO crystal. The down-converted photons from these crystals demonstrates a high visibility of 98.7% (θ2 = 0°) and 90% (θ2 = 22.5°). These results are in agreement with the theory which expects high visibility from such arrangement.