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

Pan, Duo; Shi, Tiantian; Luo, Bin; Chen, Jingbiao; Guo, Hong

doi:10.1038/s41598-018-24895-x

Cited by 7 publications

(3 citation statements)

References 47 publications

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“…Considering the stimulated amplified process of signal light, we treat the state |3〉 and the state |4〉 equivalents as a simple twolevel atomic system for the signal field. The stimulated emission from the interaction between this two-level atomic system and signal field can enhance the input signal light with a gain factor of G factor = I sout /I s (I sout is the power of the amplified signal light), and G factor is satisfied by the following equation which is described in references (Riehle, 2004;Pan et al, 2018):…”

Section: Methodsmentioning

confidence: 99%

Detection of infrared light through stimulated four-wave mixing process

Zhang

Peng

et al. 2022

Front. Quantum Sci. Technol.

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Infrared optical measurement has a wide range of applications in industry and science, but infrared light detectors suffer from high costs and inferior performance than visible light detectors. Four-wave mixing (FWM) process allows detection in the infrared range by detecting correlated visible light. We experimentally investigate the stimulated FWM process in a hot 85Rb atomic vapor cell, in which a weak infrared signal laser at 1,530 nm induces the FWM process and is amplified and converted into a strong FWM light at 780 nm, the latter can be detected more easily. We find the optimized single- and two-photon detunings by studying the dependence of the frequency of input laser on the generated FWM light. What’s more, the power gain increases rapidly as the signal intensity decreases, which is consistent with our theoretical analysis. As a result, the power gain can reach up to 500 at a signal laser power of 0.1 μW and the number of detected photons increased by a factor of 250. Finally, we experimentally prove that our amplification process can work in a broad band in the frequency domain by exploring the response rate of our stimulated FWM process.

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Section: Methodsmentioning

confidence: 99%

Detection of infrared light through stimulated four-wave mixing process

Zhang

Peng

et al. 2022

Front. Quantum Sci. Technol.

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“…This dramatic change is a special feature of confinement induced strong optical pumping associated with the buffer gas filled cell. It will have potential application in optical switch and optically controlled optical line filter [21,22].…”

Section: Steady-state Behaviourmentioning

confidence: 99%

Optical pumping and relaxation of atomic population in assorted conditions

Chowdhury¹,

Pradhan²

2022

J. Phys. B: At. Mol. Opt. Phys.

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The precise control and knowledge over the atomic dynamics is central to the advancement of quantum technology. The different experimental conditions namely, atoms in a vacuum, an antirelaxation coated and a buffer gas filled atomic cell provides complementary platform for such investigations. The extent of changes in optical pumping, velocity changing collision and hyperfine changing collision rates associated with these conditions are discussed. There is a phenomenal change in the optical density by a factor of >25 times in presence of a control field in buffer gas environment. We found confinement induced enhanced optical pumping as the mechanism behind the observed transparency in buffer gas cell. The diffusive velocity of atoms is measured to be ~25±12 m/s and ≤8±4 m/s for antirelaxation coated and buffer gas filled cell respectively. The measurements are carried out for 85Rb atoms in natural isotopic composition using pump-probe spectroscopy. The studies will have useful application in measurements of relaxation rates, quantum memory, quantum repeaters and atomic devices.

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“…Atomic line filtering is an advantageous magneto-optical bandpass technique owing to its high transmission, polarization sensitivity, and tunability [5]. Applications vary widely including weak signal detection [6], quantum information processing [7,8], self-stabilizing laser systems [9][10][11][12], and atmospheric [13] and ocean temperature measurements [14]. Single-cell Faraday filters, where a magnetic field is exerted parallel to the k-vector of the light, are discussed widely in the literature [15][16][17][18], in particular, in rubidium vapor [19][20][21][22].…”

mentioning

confidence: 99%

Better magneto-optical filters with cascaded vapor cells

et al. 2022

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Single-cell magneto-optical Faraday filters find great utility and are realized with either “wing” or “line center” spectral profiles. We show that cascading a second cell with independent axial (Faraday) or transverse (Voigt) magnetic field leads to improved performance in terms of figure of merit (FOM) and spectral profile. The first cell optically rotates the plane of polarization of light creating the high transmission window; the second cell selectively absorbs the light eliminating unwanted transmission. Using naturally abundant Rb vapor cells, we realize a Faraday–Faraday wing filter and the first, to the best of our knowledge, recorded Faraday–Voigt line center filter which show excellent agreement with theory. The two filters have FOM values of 0.86 and 1.63 GHz−1, respectively.

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

Cited by 7 publications

References 47 publications

Detection of infrared light through stimulated four-wave mixing process

Detection of infrared light through stimulated four-wave mixing process

Optical pumping and relaxation of atomic population in assorted conditions

Better magneto-optical filters with cascaded vapor cells

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