Direct generation of polarization-entangled photon pairs in a poled fiber
Zhu, Eric, Tang, Zhiyuan, Qian, Li, Helt, Lukas, Liscidini, Marco, Sipe, J., Corbari, Costantino, Canagasabey, Albert, Ibsen, Morten and Kazansky, Peter (2012) Direct generation of polarization-entangled photon pairs in a poled fiber. Physical Review Letters, 108, (21) (doi:10.1103/PhysRevLett.108.213902).
Download
Full text not available from this repository.
Description/Abstract
We experimentally demonstrate the direct generation of polarization-entangled photon pairs in an optical fiber at room temperature by exploiting type-II phase-matched spontaneous parametric down-conversion. A second-order nonlinearity is artificially induced in the 17-cm-long weakly birefringent step-index fiber through the process of thermal poling, and quasi-phase-matching allows for the generation of entangled photons in the 1.5-micron telecom band when the fiber is pumped at 775 nm. A greater-than 80:1 coincidence-to-accidental ratio is achieved, limited mainly by multiphoton pair generation. Without the need to subtract accidentals or to compensate for walk-off, the raw two-photon interference visibility is found to be better than 95%, and violation of Bell’s inequality is observed by more than 18 standard deviations. This makes for a truly alignment-free, plug-and-play source of polarization-entangled photon pairs.
| Item Type: | Article |
|---|---|
| ISSNs: | 0031-9007 (print) 1079-7114 (electronic) |
| Related URLs: | |
| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Faculty of Physical Sciences and Engineering > Optoelectronics Research Centre |
| Item ID: | 341151 |
| Date Deposited: | 16 Jul 2012 15:19 |
| Last Modified: | 26 Jul 2012 01:27 |
| Contributors: | Zhu, Eric (Author) Tang, Zhiyuan (Author) Qian, Li (Author) Helt, Lukas (Author) Liscidini, Marco (Author) Sipe, J. (Author) Corbari, Costantino (Author) Canagasabey, Albert (Author) Ibsen, Morten (Author) Kazansky, Peter (Author) |
| Date: | 21 May 2012 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/341151 |
Actions (login required)
 |
View Item |
