Atomic filter based on stimulated Raman transition at the rubidium D1 line

Xitao, Zhao; Sun, Xiujie; Zhu, Meng-Yang; Wang, Xiaofei; Ye, Chaohui; Zhou, Xin

doi:10.1364/oe.23.017988

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…We have obtained EIA resonances with amplitude comparable with Our results thus disclose new paths for EIA applications, from state manipulation in fundamental physics and metrology, to tunable and narrowband optical and photonic devices. Examples include: atomic optical isolators [33,34], atom-based polarization filters and splitters, atomic filters with sub-MHz band [35][36][37], and cavity-less bistable systems and switches [38,39], all with potential for reduced dissipation, fast switching time and efficiency tunability, not to mention control of light group velocity [9] and novel photonic metamaterials [10]. …”

Section: Configurationmentioning

confidence: 99%

Tunable and polarization-controlled high-contrast bright and dark coherent resonances in potassium

et al. 2017

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We demonstrate high-contrast Electromagnetically Induced Absorption (EIA) bright resonances on the D 1 line of 39 K with characteristics comparable to those of the Electromagnetically Induced Transparency (EIT) dark resonances observed in the same conditions. EIA is produced by the interaction of a weak probe beam with the atomic ground state driven in a degenerate coherent superposition by either a co-or counterpropagating pump beam. We have obtained an order of magnitude increase of the EIA's contrast with respect to previous similar experiments, performed with other alkalis, without compromising its linewidth. Furthermore, we show that the magneto-optic resonances can be continuously tuned from EIT to EIA by changing the relative handedness of circular polarizations of pump and probe beams, or depending on whether they co-or counter-propagate. This opens new perspectives in the use of EIA in a broad range of physical domains and in a large wealth of potential applications in optics and photonics. Contrary to Coherent Population Trapping and Electromagnetically Induced Transparency (EIT) with their ultra-narrow linewidths [1][2][3][4][5][6][7][8], Electromagnetically Induced Absorption (EIA) has found limited applications, mainly due to its broader linewidth and significantly smaller contrast. Nonetheless, an increasing interest in EIA was recently generated in view of potential applications, such as enhancement of the group velocity of light [9] and photonic metamaterials [10].EIA linewidths of several tens of kiloHertz have been reported, either with bichromatic excitation of Zeeman sublevels[11] or in Hanle configuration [12][13][14]. Bi-chromatic Hanle configuration has been explored by using Rb D 1 and D 2 lines [15]. Low-contrast EIA, resulting from EIT on D 2 line, was reported. Higher contrast EIA has been observed in [16], although overlapped to large background, which could be detrimental for highly-selective applications. More recently, sub-kHz EIA resonances were observed in Rb [17] and Cs [18,19]. In both cases, however, the contrast was of only a few percents. A pump/probe scheme in Hanle configuration for high-contrast EIA was proposed in a buffered vapor cell [20]. To date, however, no experimental demonstration has been reported. Highcontrast EIA has been observed on the 87 Rb D 2 line by using a complex excitation scheme with three separate photonic fields [21], and was theoretically investigated in [22]. EIA was also observed in the Paschen-Back regime in a purely non-degenerate three-level ladder system in 87 Rb [23]. Furthermore, while Rb and Cs have been widely investigated, this is the first observation of EIA in K, confirming our preliminary results [24].In this Letter, we report on an alternative and simpler approach for large contrast EIA in Hanle configuration using a pump/probe excitation scheme. We have observed EIA resonance contrast exceeding 50% in thermal K vapor. In this case, hyperfine optical pumping, which accumulates atoms to levels non interacting with the light [25,26], ...

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Section: Configurationmentioning

confidence: 99%

Tunable and polarization-controlled high-contrast bright and dark coherent resonances in potassium

et al. 2017

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“…A high-contrast electromagnetically-induced-transparency (EIT) medium can be realized as an atomic high-precision bandpass filter 1 – 5 . This filter can effectively produce a narrow-bandwidth light field and precisely tune the light frequency by selecting the atomic transition.…”

Section: Introductionmentioning

confidence: 99%

Ultranarrow-bandwidth filter based on a thermal EIT medium

Wang

Huang

et al. 2018

Sci Rep

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We present high-contrast electromagnetically-induced-transparency (EIT) spectra in a heated vapor cell of single isotope 87Rb atoms. The EIT spectrum has both high resonant transmission up to 67% and narrow linewidth of 1.1 MHz. We get rid of the possible amplification resulted from the effects of amplification without population inversion and four-wave mixing. Therefore, this high transmitted light is not artificial. The theoretical prediction of the probe transmission agrees well with the data and the experimental parameters can be derived reasonably from the model. Such narrow and high-contrast spectral profile can be employed as a high precision bandpass filter, which provides a significant advantage in terms of stability and tunability. The central frequency tuning range of the filter is larger than 100 MHz with out-of-band blocking ≥15 dB. This bandpass filter can effectively produce light fields with subnatural linewidth. Nonlinearity associating with the narrow-linewidth and high-contrast EIT profile can be very useful in the applications utilizing the EIT effect.

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“…However, the transmittance of this filter is only 9.7%, which finally limited its application. To break the restriction of transmittance, an atomic filter with Raman light amplification has been studied 30 – 32 , in which a Raman light amplifier and a FADOF are used in tandem with independent Rb cells. This filter enhanced the transmittance to 85-fold compared to the case operating only with the FADOF, which expands the range of potential applications.…”

Section: Introductionmentioning

confidence: 99%

Atomic optical stimulated amplifier with optical filtering of ultra-narrow bandwidth

Pan

Shi

Luo

et al. 2018

Sci Rep

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Taking advantages of ultra-narrow bandwidth and high noise rejection performance of the Faraday anomalous dispersion optical filter (FADOF), simultaneously with the coherent amplification of atomic stimulated emission, we propose a stimulated amplified Faraday anomalous dispersion optical filter (SAFADOF) at cesium 1470 nm. The SAFADOF is able to significantly amplify very weak laser signals and reject noise in order to obtain clean signals in strong background. We show that for a weak signal of 50 pW, the gain factor can be larger than 25000 (44 dB) within a bandwidth as narrow as 13 MHz. Having the ability to amplify weak signals with low background contribution, the SAFADOF finds outstanding potential applications in weak signal detections.

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Atomic filter based on stimulated Raman transition at the rubidium D1 line

Cited by 5 publications

References 19 publications

Tunable and polarization-controlled high-contrast bright and dark coherent resonances in potassium

Tunable and polarization-controlled high-contrast bright and dark coherent resonances in potassium

Ultranarrow-bandwidth filter based on a thermal EIT medium

Atomic optical stimulated amplifier with optical filtering of ultra-narrow bandwidth

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