Creating optical vortex modes with a single cylinder lens

Sridhar, Hamsa; Cohen, Martin; Noé, J.W.

doi:10.1117/12.847890

Cited by 11 publications

(18 citation statements)

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“…Mode conversion can occur with an absence of the second cylinder lens [1]. With the correct alignment, the net Gouy phase shift difference of the two beam components in the far field equals to π/2, which is the desired phase shift difference.…”

Section: Astigmatic Mode Convertersmentioning

confidence: 99%

“…This work is an extended study of the optical vortex laser beams created by a novel astigmatic mode converter with a single cylinder lens [1] [2]. Optical vortices are points of undefined phase and hence zero intensity in the center of certain light beams.…”

Section: Introductionmentioning

confidence: 99%

“…This astigmatism lasts until the beam reaches the second lens, which creates a counter-astigmatism that restores the beam to its isotropic state. A simplified method to convert modes by using a single cylinder lens was discovered by a previous student researcher [1]. Although the thus converted generates a perfectly circular vortex beam at a sufficiently large distance from the converter (in the far field), this circular vortex beam still carries a residual longitudinal astigmatism.…”

Section: Introductionmentioning

confidence: 99%

“…Converting modes with a single cylinder lens[1]. The input beam is broken down into an active beam component (in red) and an inactive beam component (in blue).…”

mentioning

confidence: 99%

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A simple method for creating a robust optical vortex beam with a single cylinder lens

Nam¹,

Cohen²,

Noé³

2011

J. Opt.

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We describe a simple method for creating Laguerre–Gauss (LG) optical vortex beams from Hermite–Gauss (HG) modes with a single cylinder lens. The diverging vortex created by the cylinder lens has the correct intensity distribution in the far-field but its residual longitudinal astigmatism causes the vortex to revert to the original HG mode when it is brought to a focus. We show that an appropriate small tilt of the focusing lens can prevent this effect by introducing a compensating astigmatism. The corrected vortex is a good approximation to an exact LG mode and should be useful for a variety of demonstrations and experiments.

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Section: Astigmatic Mode Convertersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Converting modes with a single cylinder lens[1]. The input beam is broken down into an active beam component (in red) and an inactive beam component (in blue).…”

mentioning

confidence: 99%

See 2 more Smart Citations

A simple method for creating a robust optical vortex beam with a single cylinder lens

Nam¹,

Cohen²,

Noé³

2011

J. Opt.

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show abstract

“…The traditional AMC needs two precisely spaced and aligned cylindrical lenses [18]. A modified AMC based on a single cylindrical lens was discovered to generate the optical vortex beams more quickly and effectively [20,21]. In this work, we theoretically characterize the propagation evolution of the vortex structures of HG beams transformed by singlelens AMC with arbitrary angle α.…”

Section: Introductionmentioning

confidence: 99%

Characterizing the propagation evolution of wave patterns and vortex structures in astigmatic transformations of Hermite–Gaussian beams

et al. 2017

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Theoretical wave functions are analytically derived to characterize the propagation evolution of the Hermite-Gaussian (HG) beams transformed by a single-lens astigmatic mode converter with arbitrary angle. The derived wave functions are related to the combination of the rotation transform and the antisymmetric fractional Fourier transform. The derived formula is systematically validated by using an off-axis diode-pumped solid-state laser to generate various high-order HG beams for mode conversions. In addition to validation, the creation and evolution of vortex structures in the transformed HG beams are numerically manifested. The present theoretical analyses can be used not only to characterize the evolution of the transformed beams but to design the optical vortex beams with various forms.

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Generating high-peak-power structured lights in selectively pumped passivelyQ-switched lasers with astigmatic mode transformations

et al. 2017

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Various high-order Hermite-Gaussian (HG) modes with high repetition rates and high peak powers are systematically generated by designing the cavity configuration to satisfy the criterion of the passive Q-switching. For the HG m,0 modes with the order m = 1-9, the pulse repetition rate can exceed 100 kHz with peak power higher than 0.3 kW. For the HG m,m modes with the order m = 1-10, the pulse repetition rate can be up to 37 kHz with peak power higher than 0.35 kW. Furthermore, the high-order HG beams is transformed by using an astigmatic mode converter to generate various structured lights with optical vortices. Experimental patterns of the transformed high-order HG beams in the propagation are theoretically analyzed and the phase structures are numerically manifested.

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Creating optical vortex modes with a single cylinder lens

Abstract: Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/11/2015 Terms of Use: http://spiedl.org/terms Proc. of SPIE Vol. 7613 76130X-7 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/11/2015 Terms of Use: http://spiedl.org/terms

Cited by 11 publications

References 0 publications

A simple method for creating a robust optical vortex beam with a single cylinder lens

A simple method for creating a robust optical vortex beam with a single cylinder lens

Characterizing the propagation evolution of wave patterns and vortex structures in astigmatic transformations of Hermite–Gaussian beams

Generating high-peak-power structured lights in selectively pumped passivelyQ-switched lasers with astigmatic mode transformations

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