Generation of 1.5 μm discrete frequency-entangled two-photon state in polarization-maintaining fibers

Autor:	Jiangde Peng, Qiang Zhou, Wei Zhang, Chenzhi Yuan, Yidong Huang
Rok vydání:	2014
Předmět:	Physics Phase difference Quantum Physics business.industry Polarization-maintaining optical fiber Polarization (waves) Atomic and Molecular Physics and Optics Collimated light Optics Two-photon excitation microscopy Discrete frequency domain Polarization beam splitter business Quantum
Zdroj:	Optics letters. 39(7)
ISSN:	1539-4794
Popis:	In this Letter, the generation of 1.5 {\mu}m discrete frequency entangled two-photon state is realized based on a piece of commercial polarization maintaining fiber (PMF). It is connected with a polarization beam splitter to realize a modified Sagnac fiber loop (MSFL). Correlated two-photon states are generated through spontaneous four wave-mixing process along the two propagation directions of the MSFL, and output from the MSFL with orthogonal polarizations. The quantum interference of them is realized through a 45{\deg} polarization collimation between polarization axes of PMFs inside and outside the MSFL, while the phase difference of them is controlled by the polarization state of the pump light. The frequency entangled property of the two-photon state is demonstrated by a spatial quantum beating experiment with a fringe visibility of (98.2+/-1.3)%, without subtracting the accidental coincidence counts. The proposed scheme generates 1.5 {\mu}m discrete frequency entangled two-photon state in a polarization maintaining way, which is desired in practical quantum light sources. Comment: 4 pages, 3 figures, to be appeared in Optics Letters
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14c71efbbe2dd494af86845a5329ea2b https://pubmed.ncbi.nlm.nih.gov/24686687 Zobrazit plný text záznamu