Generation of spiral optical vortex with varying OAM for micro-manipulation

Wang, Chen; Liu, Tong; Ren, Yuan

doi:10.1016/j.optcom.2022.128767

Cited by 9 publications

(5 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They have been extensively researched for their fundamental properties, methods of production, measurement, and applications in this reference [31]. OAM has been recognized as potentially useful for a vast and diverse range of applications, such as microparticle manipulation [33,34], trapped particle rotation [35], encoding of information [36], transfer of OAM to atoms [37], and some seen in Figure 3 [38]. Most especially, it has found utility in optical communications, where OAM multiplexing enables increased data transmission capacity [21].…”

Section: Background Generation and Application Of Oam Lightmentioning

confidence: 99%

Generation of Orbital Angular Momentum Light by Patterning Azopolymer Thin Films

Olaleye,

Raposo,

Ribeiro

2023

Photonics

View full text Add to dashboard Cite

Orbital angular momentum (OAM) encoding is a promising technique to boost data transmission capacity in optical communications. Most recently, azobenzene films have gained attention as a versatile tool for creating and altering OAM-carrying beams. Unique features of azobenzene films make it possible to control molecular alignment through light-induced isomerization about the azo bond. This feature enables the fabrication of diffractive optical devices such as spiral phase plates and holograms by accurately imprinting a phase profile on the incident light. By forming azobenzene sheets into diffractive optical elements, such as spiral phase plates, one can selectively create OAM-carrying beams. Due to the helical wavefront and phase variation shown by these beams, multiple distinct channels can be encoded within a single optical beam. This can significantly increase the data transmission capacity of optical communication systems with this OAM multiplexing technique. Additionally, holographic optical components made from azobenzene films can be used to build and reconstruct intricate wavefronts. It is possible to create OAM-based holograms by imprinting holographic designs on azobenzene films, which makes it simpler to control and shape optical beams for specific communication requirements. In addition, azobenzene-based materials can then be suitable for integration into optical communication devices because of their reconfigurability, compactness, and infrastructure compatibility, which are the main future perspectives for achieving OAM-based technologies for the next generation, among other factors. In this paper, we see the possible use of azobenzene films in the generation and modification of OAM beams for optical communications through light-induced isomerization. In addition, the potential role of azobenzene films in the development of novel OAM-based devices that paves the way for the realization of high-capacity, OAM-enabled optical communication networks are discussed.

show abstract

Section: Background Generation and Application Of Oam Lightmentioning

confidence: 99%

Generation of Orbital Angular Momentum Light by Patterning Azopolymer Thin Films

Olaleye,

Raposo,

Ribeiro

2023

Photonics

View full text Add to dashboard Cite

show abstract

“…VL refers to a special class of light carrying orbital angular momentum (OAM) or the so-called topological charge (l). VLs have gained widespread use in numerous advanced fields, such as high-order quantum entanglement, 25 encrypted optical communication, 26 optical micromanipulation, 27 nonlinear optics, 28 etc. The special phase singularity and spiral wavefront make its intensity distribution at the focal plane appear as a "donut" shape.…”

Section: ■ Introductionmentioning

confidence: 99%

Inhibiting Effect of Topological Charge on Laser-Induced Breakdown of Gases: Miniaturization of an SRS Laser with Vortex Raman Outputs

Sun,

Jia,

Cai

et al. 2024

ACS Photonics

View full text Add to dashboard Cite

Stimulated Raman scattering (SRS) lasers equipped with bulky gas cells have been widely criticized. The special "donut″-shaped intensity distribution of vortex light (VL) is expected to reduce the pump laser intensity, suppress laser-induced breakdown, and fulfill the laser miniaturization. In this work, spiral phase plates of different topological charges (l = 1,2,4) have been employed to convert the l = 0 flattened Gaussian beam (FGB) into VLs, which served as pump sources. Lenses with focal lengths of F = 1000, 400, and 200 mm were chosen and coupled with Raman cells of L = 1.8, 0.9, and 0.23 m, respectively, to investigate the effects of l on photon conversion efficiency (PCE), beam quality, and the output orbital angular momentums (OAMs). The optimal l under different focusing parameters was proved to be dependent on the pump energy and gas pressure. By focusing the l = +4 laser via an F = 200 mm lens into a L = 0.23 m Raman cell, a first-order Stokes (S1) PCE of up to 61.5% was achieved at a pump energy of 62.1 mJ, which is comparable with the 66.4% obtained with an F = 1000 mm lens focusing the l = 0 FGB in a L = 1.8 m cell. Next, the S1 Raman beam quality at high pressure was verified to be significantly improved from β o0 = 6.3 (l = 0) to β o2 = 3.6 (l = 2) at 0.8 MPa H 2 . Furthermore, moduli and signs of average Raman OAMs were visualized with an F = 1.5 m cylindrical lens, and the results verified the law of OAM conservation in our SRS scheme.

show abstract

“…Due to its singularity effect, OVB has a helical phase exp(i lφ ) in the wavefront structure, where l is the topological charge (TC) number which can take any integer value, φ denotes the azimuthal angle and ħ is the Planck constant. Since then, OVB has been widely used in quantum information processing [ 3 , 4 ], quantum entanglement [ 5 ], optical micromanipulation [ 6 , 7 ], optical communication [ 8 , 9 , 10 ] and nonlinear optics [ 11 , 12 ]. Hence, with the increasing demand for practical applications, OVB needs to be further studied: from generating [ 13 , 14 , 15 ] and measuring [ 16 ] to shaping OVB [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Integrated Generation and Shaping of Airy and Bessel Vortex Beams Based on All-Dielectric Metasurface

et al. 2023

View full text Add to dashboard Cite

Integrating multiple independent functions into a single optical component is one of the most important topics in research on photoelectric systems. In this paper, we propose a multifunctional all-dielectric metasurface that can achieve a variety of non-diffractive beams depending on the polarization state of the incident light. Using the anisotropic TiO2 rectangular column as the unit structure, the three functions of generating polygonal Bessel vortex beams under left-handed circularly polarized incidence, Airy vortex beams under right-handed circularly polarized incidence and polygonal Airy vortex-like beams under linearly polarized incidence are realized. In addition, the number of polygonal beam sides and the position of focal plane can be adjusted. The device could facilitate further developments in scaling complex integrated optical systems and fabricating efficient multifunctional components.

show abstract

Generation of spiral optical vortex with varying OAM for micro-manipulation

Cited by 9 publications

References 47 publications

Generation of Orbital Angular Momentum Light by Patterning Azopolymer Thin Films

Generation of Orbital Angular Momentum Light by Patterning Azopolymer Thin Films

Inhibiting Effect of Topological Charge on Laser-Induced Breakdown of Gases: Miniaturization of an SRS Laser with Vortex Raman Outputs

Numerical Simulation of Integrated Generation and Shaping of Airy and Bessel Vortex Beams Based on All-Dielectric Metasurface

Contact Info

Product

Resources

About