Optimizing beam-splitter pulses for atom interferometry: A geometric approach

Dedes, Nikolaos; Saywell, Jack; Carey, Max; Kuprov, Ilya; Freegarde, Tim

doi:10.1103/physreva.108.053319

Phys. Rev. A

2023

DOI: 10.1103/physreva.108.053319

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Optimizing beam-splitter pulses for atom interferometry: A geometric approach

Nikolaos Dedes,

Jack Saywell,

Max Carey

et al.

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2024

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Cited by 3 publications

References 45 publications

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Impact of the π-pulse shape on the contrast of thermal Atom Interferometers

López-Monjaraz,

Peña Vega,

Jiménez-García

et al. 2024

Phys. Scr.

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The key role of π- and π/2- pulses in atom interferometry has been widely recognized as theirefficiency affect the overall performance of atomic interferometers. The inefficiencies are evidentwhen using thermal cloud atoms as the field interaction does not compensate for the atom velocity.Temporal pulse shaping offers a solution to this issue by balancing the effect of the temporal shapeof the mirror pulse in thermal cold atom interferometry by testing pulse shapes beyond the standardrectangle including Gaussian-like, Sinc-like, optimized Band-selective Uniform Response Pure-phasefamily, and optimized Gaussian Cascade family. We unveiled a correlation between the π pulsefidelity and the overall interferometer contrast function. We also found robust pulse sequences withrespect to initial atom velocities that offer contrast as high as 0.7 compared to standard rectanglesequences with values of 0.2. The investigated pulse sequences offer an efficient way to improve theperformance of atom interferometers, increasing the potential of thermal cold atom interferometry.

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Impact of the π-pulse shape on the contrast of thermal Atom Interferometers

López-Monjaraz,

Peña Vega,

Jiménez-García

et al. 2024

Phys. Scr.

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Amplitude-modulated mirror pulses for improved cold-atom gravimetry

Wang,

Cheng,

Liu

et al. 2024

Phys. Rev. A

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High-efficiency three-port beam splitter under normal incidence

Li,

Xu,

Liao

et al. 2024

J. Opt. Soc. Am. A

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A fused-silica three-port grating under TE-polarized normal incidence is designed and manufactured with improved diffraction efficiency (DE) and bandwidth. A physical explanation of the grating diffraction is provided using the simplified mode method (SMM), and parameters of the grating structure were optimized using rigorous coupled-wave analysis (RCWA). For a given set of optimized parameters, a transmitted three-port grating with an area of 170mm×170mm was fabricated by scanning beam interference lithography (SBIL), and diffraction properties were investigated. The average DEs for the +1, 0, and 1 orders of the 25 sampling points are 29%, 30%, and 31% at a 632.8 nm incident wavelength. Additionally, the measured DEs of the +1, 0, and 1 orders all exceed 25% at the wavelength range from 613 to 653 nm.

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Optimizing beam-splitter pulses for atom interferometry: A geometric approach

Cited by 3 publications

References 45 publications

Impact of the π-pulse shape on the contrast of thermal Atom Interferometers

Impact of the π-pulse shape on the contrast of thermal Atom Interferometers

Amplitude-modulated mirror pulses for improved cold-atom gravimetry

High-efficiency three-port beam splitter under normal incidence

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