Determination of the coherency matrix of a broadband stochastic electromagnetic light beam

Meemon, Panomsak; Salem, Mohamed A.; Lee, Kye-Sung; Chopra, Maryam; Rolland, Jannick P.

doi:10.1080/09500340802169553

Cited by 15 publications

(3 citation statements)

References 17 publications

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“…The polarization state for the FP beam with polar angle Θ = π/3, π/2, and 2π/3 is located in the northern part, on the equator, and in the southern part of the higher-order Poincaré sphere, respectively. The Stokes parameters for the partially coherent beam are measured with the standard method [44].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Robust Full Poincaré Polarization States via Spatial Coherence Engineering

Zhang,

Dong

et al. 2024

Photonics

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The full Poincaré (FP) beam, encompassing all possible polarization states in its beam cross-section, has demonstrated advantages in various applications. However, conventional FP beams are typically considered as spatially fully coherent, rendering them sensitive to disturbances in the propagation path and susceptible to speckle effects. In this work, we propose an alternative approach to synthesize the optical beam with a FP polarization state through the spatial coherence engineering of a partially coherent beam. In this process, the FP polarization state is initially encoded into the spatial coherence structure of the beam source. We demonstrate that during the encoding process, the vector nature of the beam transitions from the FP polarization state to the spatial coherence structure of the source. However, during the propagation of the partially coherent beam, the vectorness reverts to the polarization state, resulting in the re-emergence of the encoded FP polarization in the output plane. We illustrate that the synthesized FP polarization state, achieved through spatial coherence engineering, is highly robust against obstructions in the propagation path. Furthermore, we examine the effect of the spatial coherence area of the beam on the quality of the recovered FP polarization state. The findings of this work can have valuable applications in optical trapping and optical imaging in complex environments.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Robust Full Poincaré Polarization States via Spatial Coherence Engineering

Zhang,

Dong

et al. 2024

Photonics

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“…Based on the parameter measurement system of EGSM beams proposed in [8], the experimental measurement of the received beam radius σ xyout can be carried out easily and efficiently. Moreover, according to [61], by using the polarizer and quarter-wave plate, we can also measure the degree of polarization in the receiver plane P out (0, z, ω).…”

Section: Degree Of the Polarizationmentioning

confidence: 99%

Detection of a Semi-Rough Target in Turbulent Atmosphere by an Electromagnetic Gaussian Schell-Model Beam

Zhao

Liu

et al. 2019

Applied Sciences

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The interaction of an electromagnetic Gaussian Schell-model beam with a semi-rough target located in atmospheric turbulence was studied by means of a tensor method, and the corresponding inverse problem was analyzed. The equivalent model was set up on the basis of a bistatic laser radar system and a rough target located in a turbulent atmosphere. Through mathematical deduction, we obtained detailed information about the parameters of the semi-rough target by measuring the beam radius, coherence radius of the incident beam and the polarization properties of the returned beam.

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“…This wavelength region is known as the optical window of biological samples since water absorption and blood absorption is minimum caused it becomes transparent [6,7]. Without contacting the sample, OCT focuses the near-infrared light beam deep below the biological sample's surface and gates the back-reflection light through the low-temporal coherence [8,9] of the incident light in order to section depth information of the sample at microns resolution. The low coherence gating can be achieved by the use of Michelson interferometer [10] or Mach-Zehnder interferometer [11,12].…”

Section: Introductionmentioning

confidence: 99%

Design, implementation, and characterization of spectrometer-based spectral domain optical coherence tomography

et al. 2014

Self Cite

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We report the implementation of a high speed and high resolution spectrometer-based spectral domain optical coherence tomography (SD-OCT) system. A high speed near-infrared spectrometer was designed and built, utilizing a high speed line-array CMOS detector and all off-the-shelf optical components. The acquisition speed of more than 100,000 spectra per second was achieved, enabling a high speed 3D imaging of the implemented SD-OCT system. Here, we report the performance characterization, i.e. resolution, imaging depth, and sensitivity of the implemented system. The penetration depth and depth resolution of the system are currently 2 mm and 14.1 µm, respectively. The lateral resolution of the system was quantified by the Modulation transfer function (MTF) measurement to be about 15.5 µm. over the lateral field-of-view (x-y axes) of 30 mm × 30 mm. The acquisition speed of the system was 20 frames per second.Keyword -near-infrared spectrometer, optical spectrometer design, spectral resolution, 3D imaging, noninvasive imaging, frequency domain optical coherence tomography

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Determination of the coherency matrix of a broadband stochastic electromagnetic light beam

Cited by 15 publications

References 17 publications

Synthesis of Robust Full Poincaré Polarization States via Spatial Coherence Engineering

Synthesis of Robust Full Poincaré Polarization States via Spatial Coherence Engineering

Detection of a Semi-Rough Target in Turbulent Atmosphere by an Electromagnetic Gaussian Schell-Model Beam

Design, implementation, and characterization of spectrometer-based spectral domain optical coherence tomography

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