Tunable Axicons Generated by Spatial Light Modulator with High-Level Phase Computer-Generated Holograms

Zhai, Zhongsheng; Cheng, Zhuang; Lv, Qinghua; Wang, Xuanze

doi:10.3390/app10155127

Cited by 23 publications

(12 citation statements)

References 19 publications

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“…To attain phase modulation of the incident beam, the process involves loading the CGHs into the SLM. Figure 8 a shows the hologram for mimicking the positive axicon, while Figure 8 b shows the hologram’s central profile [ 143 ]. The profile can be seen as an arrangement of evenly spaced grooves, where d and h are the period and height of the grooves, respectively.…”

Section: Spatial Light Modulator (Slm)mentioning

confidence: 99%

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Modern Types of Axicons: New Functions and Applications

Хонина

Kazanskiy

Khorin

et al. 2021

Sensors

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Axicon is a versatile optical element for forming a zero-order Bessel beam, including high-power laser radiation schemes. Nevertheless, it has drawbacks such as the produced beam’s parameters being dependent on a particular element, the output beam’s intensity distribution being dependent on the quality of element manufacturing, and uneven axial intensity distribution. To address these issues, extensive research has been undertaken to develop nondiffracting beams using a variety of advanced techniques. We looked at four different and special approaches for creating nondiffracting beams in this article. Diffractive axicons, meta-axicons-flat optics, spatial light modulators, and photonic integrated circuit-based axicons are among these approaches. Lately, there has been noteworthy curiosity in reducing the thickness and weight of axicons by exploiting diffraction. Meta-axicons, which are ultrathin flat optical elements made up of metasurfaces built up of arrays of subwavelength optical antennas, are one way to address such needs. In addition, when compared to their traditional refractive and diffractive equivalents, meta-axicons have a number of distinguishing advantages, including aberration correction, active tunability, and semi-transparency. This paper is not intended to be a critique of any method. We have outlined the most recent advancements in this field and let readers determine which approach best meets their needs based on the ease of fabrication and utilization. Moreover, one section is devoted to applications of axicons utilized as sensors of optical properties of devices and elements as well as singular beams states and wavefront features.

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Section: Spatial Light Modulator (Slm)mentioning

confidence: 99%

“… ( a ) A hologram for achieving the positive axicon [ 143 ], and ( b ) the central profile of the hologram [ 143 ]. …”

Section: Figurementioning

confidence: 99%

Modern Types of Axicons: New Functions and Applications

Хонина

Kazanskiy

Khorin

et al. 2021

Sensors

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“…While traditional systems control the depth of field by the apodization of the a pupil 22 , others employ tunable reflexive axicons that are capable of changing the length of the DOF 23 , 24 to obtain same results. Alternatively, the DOF may be made tunable by adding an extra convex lens before an axicon.…”

Section: Introductionmentioning

confidence: 99%

Flat variable liquid crystal diffractive spiral axicon enabling perfect vortex beams generation

Pereiro-García

García-de-Blas

Geday

et al. 2023

Sci Rep

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A transparent variable diffractive spiral axicon (DSA) based on a single LC cell is presented. The manufactured DSA can be switched between 24 different configurations, 12 convergent and 12 divergent, where the output angle is varied as a function of the applied topological charge. The active area of the device is created using a direct laser writing technique in indium-tin oxide coated glass substrates. Liquid crystal is used to modulate the phase of the incoming beam generating the different DSA configurations. The DSA consists in 24 individually driven transparent spiral shaped electrodes, each introducing a specific phase retardation. In this article, the manufacture and characterization of the tunable DSA is presented and the performance of the DSA is experimentally demonstrated and compared to the corresponding simulations.

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“…Later, the generation of BG beams was reported using computer-generated holograms [20,21]. Furthermore, a spatial light modulator (SLM) encoded with tunable axicon hologram has been utilized to generate a zero-order BG beam [22,23]. In some of the studies, an SLM encoded with combined spatial phase plate (SPP) and axicon phase-only hologram and spiral phase holograms have been used for higherorder BG beam generation [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…This has led to the motivation to develop the holographic axicon over choosing a physical axicon for generating BG beams [22]. Previous studies have provided strong proof that the intensity distribution of BG beams generated through real axicon and axicon hologram encoded in SLM are similar and moreover such beams produced by SLM have an enduring, flawless shape throughout the range z max [23]. Hence, these are the motivation for our work of simulating axicon holograms to generate scalar as well as vector BG beams.…”

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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Tunable Axicons Generated by Spatial Light Modulator with High-Level Phase Computer-Generated Holograms

Cited by 23 publications

References 19 publications

Modern Types of Axicons: New Functions and Applications

Modern Types of Axicons: New Functions and Applications

Flat variable liquid crystal diffractive spiral axicon enabling perfect vortex beams generation

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

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