Fabrication of photonic devices directly written in glass using ultrafast Bessel beams

Zambon, Véronique; McCarthy, Nathalie; Piché, Michel

doi:10.1117/12.807194

Cited by 12 publications

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“…refractive index modification) in the longitudinal direction. Studies [40,41,42,43] have related good results for laser micromachining in glass with Bessel beams, obtaining microchannels with 2 µm of diameter and with high aspect ratios (up to 40). "Lego-beams" could be used for laser-writing waveguide structures and microchannels (for microfluidics) with a great variety of forms and, due their diffraction resistant characteristics, with long longitudinal lengths.…”

Section: Theoretical Examplesmentioning

confidence: 99%

Structured Light by Linking Diffraction-Resistant Spatially Shaped Beams

et al. 2018

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In this paper we present a theoretical method, together with its experimental confirmation, to obtain structures of light by connecting diffraction-resistant cylindrical beams of finite lengths and different radii. The resulting "Lego-beams" can assume, on demand, various unprecendent spatial configurations. We also experimentally generate some of them on using a computational holographic technique and a spatial light modulator. Our new, interesting method of linking together various pieces of light can find applications in all fields where structured light beams are needed, in particular such as optical tweezers, e.g. for biological manipulations, optical guiding of atoms, light orbital angular momentum control, holography, lithography, non-linear-optics, interaction of electromagnetic radiation with Bose-Einstein condensates, and so on, besides in general the field of Localized Waves (non-diffracting beams and pulses). [MZR] ( * ) Visiting c/o Decom, Unicamp, by a PVE fellowship of CAPES (Brazil) arXiv:1712.01118v2 [physics.optics] 5 Apr 2018Structured Light [1,2,3, 4,5,6] has been more and more studied, and applied in various sectors, like optical tweezers [7,8,9,10,11,12,13,14,15,16,17], optical guiding of atoms [18,19,20,21,22,23,24], imaging [25], light orbital angular momentum control and applications [26,27,28,29,30,31], and photonics in general.A rather efficient method to model longitudinally the intensity of non-diffracting beams is by the so-called Frozen Waves (FWs) [1,2,3,32,33,34,35,36], obtained from superpositions of co-propagating Bessel beams, endowed with the same frequency and order. The resulting diffraction resistant beam, with a longitudinal intensity shape freely chosen a priori, may then propagate, remaining confined, along the propagation axis z, or over a cylindrical surface (depending on the order of the constituting Bessel beams), while its "spot" size, and the cylindrical surface radius, can be as well chosen a priori. In this way, it is possible to construct, e.g., cylindrical beams whose static envelopes possess non-negligible energy density in finite, well-defined spatial intervals only: so that they can be regarded as segments or cylindrical pieces of light.Aiming also at a greater control on the beam transverse shape, another method was recently proposed [24,26], where different-order FW-type beams are superposed, which possess appreciable intensities along different, but consecutive, space intervals: So that one ends with cylindrical structures of light endowed with different radii and located in different positions along the z axis. This new method resulted efficient, incidentally, also for controlling the orbital angular momentum along the propagation axis [26].Anyway, and interestingly enough, it is possible to join together in the same way even two FW-type beams bearing the same order, by getting again a structure with two different-radius cylinders, each one in its own space interval. To this aim, it is sufficient that each equal-order FW possesses a different value of ...

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Section: Theoretical Examplesmentioning

confidence: 99%

Structured Light by Linking Diffraction-Resistant Spatially Shaped Beams

et al. 2018

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“…The fundamental mode (TEM 00 ) of the cavity of Gaussian laser beam is the most common beam shape used in optical processing. In particular, for materials processing [1][2][3][4][5][6][7][8] the low divergence of the Gaussian beam provides a small focused spot. It can be shown that a focal spot size as small as 1 μm can be obtained using a lens with a given numerical aperture NA [3].…”

Section: Introductionmentioning

confidence: 99%

Untitled

2019

Int J Opt Photonic Eng

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Beam shaping technique is applied to design optical lenses for transforming uniform beams to diffraction-free Bessel Beams. One-lens and two-lens refracting system will be demonstrated where the lens' surfaces equations can be easily derived. The designed lenses take the input uniform beam distribution and confine it to be within the main lobe of the Bessel beam and avoid its zeros crossings. Various design parameters such as the power of the beam and the optical system length will be discussed. It will be demonstrated that the two-element design will produce smaller system length than the one-element design.

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Nonstandard Light for Ultrafast Laser Microstructuring and Nanostructuring

Courvoisier

2023

Springer Series in Optical Sciences

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Fabrication of photonic devices directly written in glass using ultrafast Bessel beams

Cited by 12 publications

References 0 publications

Structured Light by Linking Diffraction-Resistant Spatially Shaped Beams

Structured Light by Linking Diffraction-Resistant Spatially Shaped Beams

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Nonstandard Light for Ultrafast Laser Microstructuring and Nanostructuring

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