Low‐Light Shadow Imaging Using Quadrature‐Noise Detection with a Camera

Cuozzo, Savannah L.; Barge, Pratik J.; Prajapati, Nikunjkumar; Bhusal, Narayan; Lee, Hwang; Cohen, Lior; Novikova, Irina; Михайлов, Е. Е.

doi:10.1002/qute.202100147

Cited by 6 publications

(2 citation statements)

References 35 publications

(46 reference statements)

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“…The study reported here sheds light on some complex mode dynamics, transition to instability, and correlations in driven dispersive nonlinear resonators. The multimode and spatially-distinct nature of the correlations in the AMWM studied here can also find applications in study of phase transition 17 , multimode optical switching 18 , quantum imaging 32 , 33 , and quantum communications 7 , 34 using room-temperature sources. For example, by reflecting one beam from an object and detecting both correlated beams on a CCD camera, the intensity correlations can be used to measure change in the reflectivity beyond the state-of-the-art classical devices 35 .…”

Section: Introductionmentioning

confidence: 84%

Intensity instability and correlation in amplified multimode wave mixing

Owens

Ather

et al. 2022

Sci Rep

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The dynamics of optical nonlinearity in the presence of gain and feedback can be complex leading to chaos in certain regimes. Temporal, spectral, spatial, or polarization instability of optical fields can emerge from chaotic response of an optical $$\chi ^{(2)}$$ χ ( 2 ) or $$\chi ^{(3)}$$ χ ( 3 ) nonlinear medium placed between two cavity mirrors or before a single feedback mirror. The complex mode dynamics, high-order correlations, and transition to instability in these systems are not well known. We consider a $$\chi ^{(3)}$$ χ ( 3 ) medium with amplified four-wave mixing process and study noise and correlation between multiple optical modes. Although individual modes show intensity instability, we observe relative intensity noise reduction close to the standard quantum noise, limited by the camera speed. We observe a relative noise reduction of more than 20 dB and fourth-order intensity correlation between four spatial modes. More than 100 distinct correlated quadruple modes can be generated using this process.

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Section: Introductionmentioning

confidence: 84%

Intensity instability and correlation in amplified multimode wave mixing

Owens

Ather

et al. 2022

Sci Rep

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“…We did not take any additional steps to reduce the probe beam power before the magnetometery cell. However, it is straightforward to reduce it without compromising the amount of noise suppression using a simple Mach-Zender interferometer [34], and our measurements suggest that the magnetometer sensitivity may be improved with additional optimization of the mean probe power.…”

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confidence: 95%

Improving Sensitivity of an Amplitude-Modulated Magneto-Optical Atomic Magnetometer using Squeezed Light

Li¹,

Novikova²

2022

Preprint

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We experimentally demonstrate that a squeezed probe optical field can improve the sensitivity of the magnetic field measurements based on nonlinear magneto-optical rotation (NMOR) with an amplitude-modulated pump when compared to a coherent probe field under identical conditions.To realize an all-atomic magnetometer prototype, we utilize a nonlinear atomic interaction, known as polarization self-rotation(PSR), to produce a squeezed probe field. An independent pump field, amplitude-modulated at the Larmor frequency of the bias magnetic field, allows us to extend the range of most sensitive NMOR measurements to sub-Gauss magnetic fields. While the overall sensitivity of the magnetometer is rather low (> 250 pT/ √ Hz, we clearly observe a 15 % sensitivity improvement when the squeezed probe is used. Our observations confirm the recently reported quantum enhancement in a modulated atomic magnetometer [1].

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Near single-photon imaging in the shortwave infrared using homodyne detection

Wolley

Mekhail

Moreau

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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Low-light imaging is challenging in regimes where low-noise detectors are not yet available. One such regime is the shortwave infrared where even the best multipixel detector arrays typically have a noise floor in excess of 100 photons per pixel per frame. We present a homodyne imaging system capable of recovering both intensity and phase images of an object from a single frame despite an illumination intensity of ≈ 1 photon per pixel. We interfere this weak signal which is below the noise floor of the detector with a reference beam that is ∼ 300 , 000 times brighter, record the resulting interference pattern in the spatial domain on a detector array, and use Fourier techniques to extract the intensity and phase images. We believe our approach could vastly extend the range of applications for low-light imaging by accessing domains where low-noise cameras are not currently available and for which low-intensity illumination is required.

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Low‐Light Shadow Imaging Using Quadrature‐Noise Detection with a Camera

Cited by 6 publications

References 35 publications

Intensity instability and correlation in amplified multimode wave mixing

Intensity instability and correlation in amplified multimode wave mixing

Improving Sensitivity of an Amplitude-Modulated Magneto-Optical Atomic Magnetometer using Squeezed Light

Near single-photon imaging in the shortwave infrared using homodyne detection

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