Optimal pulse propagation in an inhomogeneously gas-filled hollow-core fiber

Sulzbach, Roman; Peters, Thorsten; Walser, Reinhold

doi:10.1103/physreva.100.013847

Cited by 8 publications

(6 citation statements)

References 62 publications

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“…More interestingly, the ring-shaped profile of the LG beam in the trigger field provides higher tunability for the SOC splitting of the spinor image than a simple Gaussian profile in conventional EIT-based lensing effect [53][54][55][56][57].…”

Section: Discussionmentioning

confidence: 99%

Low-light-level spin–orbit splitting via structured light cross-Kerr interaction in coherent atomic media

Zhao

2023

Commun. Theor. Phys.

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We explore the spin-orbit coupling (SOC) mechanism for structured light in coherent atomic media with low-light-level cross-Kerr nonlinearity. Using the five-level M-type electromagnetic induced transparency (EIT) system as a prototype, we show that spin-orbit splitting for a weak spinor image can be generated by a weak trigger field carrying orbital angular momentum (OAM) at low-light intensity. By quantum-optical analogy, the paraxial focusing and defocusing of the two pseudo-spin states in the spinor image can be governed by a Pauli-like equation. More importantly, by changing the EIT parameters, especially the topological charge of the weak trigger field, the SOC-induced radial quantization of the spinor image can be rather significant, giving rise to positive or negative OAM-OAM mode separation in free space. This suggests that the separation can be flexibly controlled due to strong image-vortex interaction based on few-photon cross-Kerr modulation. Our findings may have the potential for all-optical OAM multiplexing and demultiplexing of structured light fields toward few-photon quantum control and multimode communication.

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Section: Discussionmentioning

confidence: 99%

Low-light-level spin–orbit splitting via structured light cross-Kerr interaction in coherent atomic media

Zhao

2023

Commun. Theor. Phys.

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“…( 1) and ( 2). In good approximation, n(r) can be written as a Gaussian of 1/e-width σ a [36]. After release from the FORT the density evolves as…”

Section: Determination Of the Temperature Inside The Fortmentioning

confidence: 99%

“…A drawback of these type of fibers is their relatively large core diameter, resulting in weaker light-matter coupling strengths, compared to HCPBGFs. HCPBGFs, on the other hand, are available with core diameters below 10 µm to enable stronger light-matter coupling and suffer less from micro-lensing [21,36], but provide smaller guiding bandgaps and larger, uncontrolled birefringence [37]. Nonetheless, efficient loading of atoms into such fibers [9,10,15] and quantum optics experiments [10,38], even down to the quantum level [39], were demonstrated recently.…”

Section: Introductionmentioning

confidence: 99%

Loading and spatially-resolved characterization of a cold atomic ensemble inside a hollow-core fiber

Peters,

Yatsenko,

Halfmann

2021

Preprint

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We experimentally study the loading of laser-cooled atoms from a magneto-optical trap into an optical dipole trap located inside a hollow-core photonic bandgap fiber, followed by propagation of the atoms therein. Although only limited access in 1D is available to probe atoms inside such a fiber, we demonstrate that a detailed spatially-resolved characterization of the loading and trapping process along the fiber axis is possible by appropriate modification of probing techniques combined with theoretical analysis. Specifically, we determine the ensemble temperature, spatial density (profile), loss rates, axial velocity and acceleration. The spatial resolution along the fiber axis reaches a few millimeters, which is much smaller than the typical fiber length in experiments. We compare our results to other fiber-based as well as free-space optical dipole traps. Moreover, we identify limits to the loading efficiency and potential for further improvements.

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“…A completely different approach is represented by lasing without inversion (LWI) first proposed in [6][7][8][9]. The main idea of LWI is to suppress the absorption of coherent radiation on the lasing transition by using quantum interference effects such as electromagnetically induced transparency (EIT) [10][11][12][13] or coherent population trapping (CPT). In contrast to nonlinear techniques where the medium mediates the energy transfer of the fundamental lasers to coherent radiation at a shorter wavelength, in LWI the energy is transformed from incoherent to coherent radiation in the medium comparable to conventional lasers.…”

Section: Introductionmentioning

confidence: 99%

Doppler-free three-photon coherence effects in mercury vapor

Rein,

Schmitt,

Sturm

et al. 2021

Preprint

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Doppler-free three-photon coherence effects at a wavelength of 253.7 nm have been observed in thermal mercury vapor. The experimental results are compared to simulations based on a detailed theoretical model reproducing the measured effects. Based on these results, we show by simulations that amplification without inversion in our setup is feasible, paving the way towards lasing without inversion in mercury.

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Optimal pulse propagation in an inhomogeneously gas-filled hollow-core fiber

Cited by 8 publications

References 62 publications

Low-light-level spin–orbit splitting via structured light cross-Kerr interaction in coherent atomic media

Low-light-level spin–orbit splitting via structured light cross-Kerr interaction in coherent atomic media

Loading and spatially-resolved characterization of a cold atomic ensemble inside a hollow-core fiber

Doppler-free three-photon coherence effects in mercury vapor

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