Polarization-entangled photon pairs using spontaneous four-wave mixing in a fib...

• Author(s): Almeida, Álvaro J. ; Carneiro, Steven R. ; Silva, Nuno A. ; Muga, Nelson J. ; Pinto, Armando N.
• Date: 2011
• Persistent ID: http://hdl.handle.net/10773/6278
• Origin: RIA - Repositório Institucional da Universidade de Aveiro
• Subject(s): Spontaneous four-wave mixing; Quantum entanglement; Sagnac fiber loop; Coincidence
• Document Type: Conference Object
• Language: English

Description

We generate polarization-entangled photon pairs in the 1550-nm wavelength telecom band, using spontaneous fourwave mixing in a highly nonlinear fiber loop. With accidental coincidences subtracted, we obtain coincidence fringes with visibilities greater than 86%, and thus observe a violation of Clauser, Horne, Shimony and Holt (CHSH) inequality by 2.7 standard deviations. The experimental setup is built using only fiber connections, which contribute to its long time stability. QuantTel - Quantum Secure Telecommunications QuantPrivTel - Quantum Private Telecommunications - PTDC/EEATEL/ 103402/2008