Efficient transfer of spatial intensity and phase information of arbitrary modes via four-wave mixing in an atomic vapor

Verma, Onkar Nath; Pandey, Ravi Kamal; Yadav, Raja Ram; Patel, Anjlee

doi:10.1103/physreva.106.053713

Cited by 8 publications

(3 citation statements)

References 62 publications

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“…Recently, a five-level M type atomic system has been utilized to spontaneously generate the structured light [41]. FWM process is used to generate a Stokes beam whose intensity is the same while the phase is conjugated to the probe in a three-level Λ system [42] with emphasis on OAM transfer. The non-degenerate FWM process is used for mode transfer in the case of non-diffracting beams [43].…”

Section: Introductionmentioning

confidence: 99%

Effect of relaxation on the transfer of orbital angular momentum via four-wave mixing process in the four-level double lambda atomic system

Kumar,

Manchaiah,

Ahmad

et al. 2024

New J. Phys.

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In this work, we have theoretically studied the resonant four-wave mixing(FWM) in a four-level double Lambda(Λ) atomic system in connection with orbital angular momentum(OAM) transfer from probe to generated signal beam. The effect of the relaxation process is studied in the forward as well as backward FWM. Based on the semiclassical model, our analysis shows a strong dependence of conversion efficiency on spontaneous decay and decoherence rates. From the intensity and phase profile, we have confirmed the OAM nature of the generated signal beam. The physical explanation is given for the dependence of efficiency on the decay rate of the excited atomic state. We have shown that decoherence present in the system always leads to a deleterious effect on conversion efficiency. Our presentation treats forward and backward FWM in a unified way in the context of OAM transfer and sheds light on the parameter dependence of conversion efficiency.

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Section: Introductionmentioning

confidence: 99%

Effect of relaxation on the transfer of orbital angular momentum via four-wave mixing process in the four-level double lambda atomic system

Kumar,

Manchaiah,

Ahmad

et al. 2024

New J. Phys.

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“…Within these media, a wide range of nonlinear processes have been extensively investigated to realize the OAM transfer, including sum-frequency generation (SFG), four-wave mixing (FWM), and second-harmonic generation (SHG) [14][15][16]. In particularly, the OAM transfer based on FWM has attracted tremendous attention because the FWM process has strict phase matching conditions, which two (three) frequencies mutually interact to produce two (one) new frequencies, moreover, it prevents any information loss due to linear absorption and permits us to work at high optical depths [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Manipulation of the orbital angular momentum via four-wave mixing in Rb vapor

Liu¹,

Wang²,

Yuan³

et al. 2023

Laser Phys. Lett.

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The manipulation of the orbital angular momentum (OAM) contributes to understand the OAM multiplexing, is significant in free-space optical communication and information processing. We theoretically simulate and experimentally demonstrate the regularity of the OAM transfer, including the angular and radial modes, of Laguerre–Gaussian beam via four-wave mixing process in 85Rb vapor. The 420 nm coherent blue light output field inherits the phase characteristic of 780 nm and 776 nm beams with different OAM modes. The output field OAM modes show the transfer as a typical arithmetic operation of the input field OAM modes with equal-handed angular indice l, while, the conversion between angular and radial modes occurs with the opposite angular indice l. Such rules of the OAM transfer and manipulation have implications on the research of high-capacity information transfer and quantum communication.

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“…Ding et al reported a frequency up-conversion process based on FWM to transfer an image from infrared field to visible light using atomic vapor 11 . The transfer of orbital angular momentum (OAM) states of an optical vortex beam from one frequency to another frequency light have been studied using FWM process is atomic vapor 12,13 .…”

Section: Introductionmentioning

confidence: 99%

Efficient frequency conversion of non-diffracting modes via four-wave mixing in rubidium vapor

Verma

Kant

2023

Preprint

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We investigate the nonlinear frequency conversion of non-diffracting optical modes via non-degenerate four-wave mixing(FWM) process in rubidium vapor. In this process, two strong control fields and a weak probe field mutually interact via afour-level double-Λ type atomic system to produce a new frequency weak Stokes field which is a phase conjugate to probe. We show that any arbitrary mode such as Airy, Bessel, Mathieu, and Weber beams encoded initially in the spatial envelope of probe field are efficiently transferred to FWM Stokes field by satisfying the phase matching condition. Interestingly, we found that the transmitted intensity profiles of Stokes beam are identical to that of probe beam while phase profile is complimentary.The phase conjugation property of output beams is revealed by interfering them with a copropagating plane wave. We further found the fidelity in terms of structural similarity between two transmitted modes of about 99%, which substantiates the high efficiency of FWM process. The efficient transfer and frequency conversion of such diffraction-free beams may have potential applications in nonlinear optical and quantum technologies.

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Efficient transfer of spatial intensity and phase information of arbitrary modes via four-wave mixing in an atomic vapor

Cited by 8 publications

References 62 publications

Effect of relaxation on the transfer of orbital angular momentum via four-wave mixing process in the four-level double lambda atomic system

Effect of relaxation on the transfer of orbital angular momentum via four-wave mixing process in the four-level double lambda atomic system

Manipulation of the orbital angular momentum via four-wave mixing in Rb vapor

Efficient frequency conversion of non-diffracting modes via four-wave mixing in rubidium vapor

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