Generation of off-axis phased Gaussian optical array along arbitrary curvilinear arrangement

Zhang, Yagang; Yang, Kaibo; Wen, Feng; Gu, Yuzong; Wu, Zhenkun

doi:10.1016/j.optcom.2022.128967

Cited by 9 publications

(4 citation statements)

References 60 publications

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“…For positive TCs, the intensity and phase gradients have opposite directions, whereas for negative TCs, the directions are the same. [ 55 ] The energy flows are computed as transverse components of the Poynting vector as follows: [ 56 ]

\begin{eqnarray} \left\langle {\vec{J}} \right\rangle &=& \frac{c}{{4\pi \varepsilon }}\left\langle {\vec{D} \times \vec{B}} \right\rangle\nonumber\\ &=& \frac{c}{{8\pi \varepsilon }}\left( {i\omega \left( {E{\nabla }_ \bot {E}^* - {E}^*{\nabla }_ \bot E} \right) + 2\omega k{{\left| E \right|}}^2{{\vec{e}}}_z} \right) \end{eqnarray}

where c denotes the speed of light in vacuum, ε is the permittivity,

\vec{D}

and

\vec{B}

represent the electric and magnetic fields, respectively,

{\nabla }_ \bot = {\vec{e}}_x\frac{\partial }{{\partial x}} + {\vec{e}}_y\frac{\partial }{{\partial y}}

is used to calculate the transverse gradient of E , and

{E}^ *

denotes the complex conjugate beam of E . The energy flow of the HO‐OVL was numerically simulated using Equation (10).…”

Section: Resultsmentioning

confidence: 99%

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Generation and Talbot Effect of Optical Vortex Lattices with High Orbital Angular Momenta

Luo,

Sang,

Xiao

et al. 2023

Adv Quantum Tech

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Optical vortex lattices (OVLs) are gaining increased research attention owing to their unique features related to intensity and phase structure. Interference is a common method for generating an OVL. However, the topological charge (TC) of a single building block in an OVL is fixed and cannot be modulated, thereby limiting its applicability. This study entailed the use of phase multiplication to generate a high‐order OVL to facilitate the arbitrary modulation of its TC. The generated high‐order OVL exhibited the Talbot effect during transmission, and it transformed into a super‐honeycomb lattice at specific fractional Talbot lengths. In addition, an orbital angular momentum developed in the OVL; this has broad application prospects in optical micromanipulation. Further, a method for generating super‐honeycomb lattices is devised. The findings of this study enhances understanding of the Talbot effect and broaden the practical applicability of OVLs.

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\begin{eqnarray} \left\langle {\vec{J}} \right\rangle &=& \frac{c}{{4\pi \varepsilon }}\left\langle {\vec{D} \times \vec{B}} \right\rangle\nonumber\\ &=& \frac{c}{{8\pi \varepsilon }}\left( {i\omega \left( {E{\nabla }_ \bot {E}^* - {E}^*{\nabla }_ \bot E} \right) + 2\omega k{{\left| E \right|}}^2{{\vec{e}}}_z} \right) \end{eqnarray}

where c denotes the speed of light in vacuum, ε is the permittivity,

\vec{D}

and

\vec{B}

represent the electric and magnetic fields, respectively,

{\nabla }_ \bot = {\vec{e}}_x\frac{\partial }{{\partial x}} + {\vec{e}}_y\frac{\partial }{{\partial y}}

is used to calculate the transverse gradient of E , and

{E}^ *

denotes the complex conjugate beam of E . The energy flow of the HO‐OVL was numerically simulated using Equation (10).…”

Section: Resultsmentioning

confidence: 99%

“…For positive TCs, the intensity and phase gradients have opposite directions, whereas for negative TCs, the directions are the same. [55] The energy flows are computed as transverse components of the Poynting vector as follows: [56] ⟨…”

Section: Resultsmentioning

confidence: 99%

Generation and Talbot Effect of Optical Vortex Lattices with High Orbital Angular Momenta

Luo,

Sang,

Xiao

et al. 2023

Adv Quantum Tech

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recalling the descriptions of beam array [27,[34][35][36], the center of sub-beam of a beam array is set as r x , r y , the CSD of an RPLHGSM beam array composed of N HGCSM sub-beams with radial distributions at source plane z = 0 can be given as:…”

Section: Model Of An Rplhgsm Beam Arraymentioning

confidence: 99%

Radially Phased-Locked Hermite–Gaussian Correlated Beam Array and Its Properties in Oceanic Turbulence

et al. 2023

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The descriptions of a radially phased-locked Hermite–Gaussian correlated beam array are introduced, the equation of this beam array in oceanic turbulence is derived, and the intensity profiles of this beam array are shown and analyzed. The results imply that the evolutions of the sub-beam of this beam array in free space are the same as the Hermite–Gaussian correlated beam, while the intensity of this beam array can be adjusted by controlling the initial beam radius R and the coherence length. The intensity profiles of this beam array in free space have multiple spots during propagation, while the same beam array in oceanic turbulence can become a beam spot due to the influences of R and oceanic turbulence. The beam array with smaller coherence length in oceanic turbulence retains the splitting properties better during propagation.

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“…A method is proposed to generate a phased Gaussian optical array by arranging an aperture-bounded Gaussian optical array along arbitrary curves and using a discontinuous phase to form a controllable vortex phase. A complex optical field is constructed by superposing two concentric Gaussian optical arrays [29].…”

Section: Introductionmentioning

confidence: 99%

Generating scalar and vector modes of Bessel beams utilizing holographic axicon phase with spatial light modulator

Baliyan

Nishchal

2023

J. Opt.

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This paper presents an efficient method for the generation of scalar as well as vector modes of Bessel-Gaussian (BG) beams by utilizing computer generated phase-only mask encoded on the spatial light modulator (SLM). A phase-only hologram corresponding to the transmission function of axicon combined with spatial phase plate (SPP) is used. The SPP converts Gaussian field into phase singular beam of order l associated with azimuthally varying spiral wavefront structure and axicon helps achieving non-diffracting BG beams. A compact experimental set-up is proposed for experimental realization of BG fields possessing both homogeneous as well as spatially varying polarization distributions across transverse plane. Scalar BG beams are generated through the modulation of combined phase patterns of axicon and SPP with the SLM. Vector BG beams are generated with two special cases: azimuthally and radially polarized inhomogeneous distributions through dual-passes from the SLM. A non-interferometric technique of dual-pass modulation, from the phase patterns displayed on a single SLM, which is divided into two halves, has been utilized. Here, scalar BG beam with orthogonal phase structure are encoded into orthogonal components of incoming light.

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Generation of off-axis phased Gaussian optical array along arbitrary curvilinear arrangement

Cited by 9 publications

References 60 publications

Generation and Talbot Effect of Optical Vortex Lattices with High Orbital Angular Momenta

Generation and Talbot Effect of Optical Vortex Lattices with High Orbital Angular Momenta

Radially Phased-Locked Hermite–Gaussian Correlated Beam Array and Its Properties in Oceanic Turbulence

Generating scalar and vector modes of Bessel beams utilizing holographic axicon phase with spatial light modulator

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