Bloch oscillations in an optical lattice generated by a laser source based on a fiber amplifier: decoherence effects due to amplified spontaneous emission

被引：9

作者：

Andia, Manuel ^{[1
]}

Wodey, Etienne ^{[1
]}

Biraben, Francois ^{[1
]}

Clade, Pierre ^{[1
]}

Guellati-Khelifa, Saida ^{[1
,2
]}

机构：

[1] UPMC, Univ Paris 04, ENS PSL Res Univ, CNRS,Coll France,Lab Kastler Brossel, F-75005 Paris, France

[2] Conservat Natl Arts & Metiers, F-75141 Paris, France

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2015年 / 32卷 / 06期

关键词：

CRYSTALS; RUBIDIUM; 780NM; NM;

D O I：

10.1364/JOSAB.32.001038

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have developed a laser source generated by frequency doubling of a seed laser at 1560 nm using a periodically poled lithium niobate crystal. The seed laser passes through a 30 W fiber amplifier. The laser source at 780 nm is used to perform Bloch oscillations of ultra-cold atoms in an optical lattice. In this paper we investigate the decoherence effects induced by the amplified spontaneous emission (ASE) in the gain medium. We show that the ASE drastically reduces the efficiency of Bloch oscillations. We totally filter out the ASE around the D2 line using a heated rubidium vapor cell. We precisely determine the power spectral density of the ASE by measuring the fraction of atoms transferred from the hyperfine level F = 1 to F = 2, when the laser is switched on. (C)2015 Optical Society of America

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收藏

页码：1038 / 1042

页数：5

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