White light generated by femtosecond optical vortex beams

Hansinger, P.; Maleshkov, Georgi; Garanovich, Ivan L.; Skryabin, Dmitry V.; Neshev, Dragomir N.; Dreischuh, A.; Paulus, Gerhard G.

doi:10.1364/josab.33.000681

Cited by 25 publications

(16 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the past few decades, OVs have become a research topic in many areas of physics, including cold atoms in Bose-Einstein condensates (Matthews et al 1999), nonlinear optics (Kivshar and Agrawal 2003;Hansinger et al 2014Hansinger et al , 2016, fluid dynamics (Brandt et al 2002), optical communications (Li and Wang 2017), spectroscopy , interferometry (Fürhapter et al 2005), and optical metrology (Wang et al 2006b, a), just to mention a few. Ingenious applications include optical manipulation of small particles (Grier 2003), optical vortex coronagraph (Foo et al 2005), high-resolution microscopy and lithography (Scott et al 2009), and multiplexing of information for data transfer using complex optical fields (Trichili et al 2016;Gregg et al 2016;Wang et al 2012;Larocque et al 2017;Liu et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Focal beam structuring by triple mixing of optical vortex lattices

et al. 2021

View full text Add to dashboard Cite

On-demand generation and reshaping of arrays of focused laser beams is highly desired in many areas of science and technology. In this work, we present a versatile approach for laser beam structuring in the focal plane of a lens by triple mixing of square and/or hexagonal optical vortex lattices (OVLs). In the artificial far field the input Gaussian beam is reshaped into ordered arrays of bright beams with flat phase profiles. This is remarkable, since the bright focal peaks are surrounded by hundreds of OVs with their dark cores and two-dimensional phase dislocations. Numerical simulations and experimental evidences for this are shown, including a broad discussion of some of the possible scenarios for such mixing: triple mixing of square-shaped OVLs, triple mixing of hexagonal OVLs, as well as the two combined cases of mixing square-hexagonal-hexagonal and square-square-hexagonal OVLs. The particular ordering of the input phase distributions of the OV lattices on the used spatial light modulators is found to affect the orientation of the structures ruled by the hexagonal OVL. Reliable control parameters for the creation of the desired focal beam structures are the respective lattice node spacings. The presented approach is flexible, easily realizable by using a single spatial light modulator, and thus accessible in many laboratories.

show abstract

Section: Introductionmentioning

confidence: 99%

Focal beam structuring by triple mixing of optical vortex lattices

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Femtosecond light pulses allow for the generation of optical vortices with high energy and ultrashort temporal profiles [15], crucial to generating a supercontinuum and probing other nonlinear phenomena. Femtosecond vortices have found their main applications in subwavelength nonlinear microscopy [16] and femtosecond micro-nano manipulation [17], and their production has been recently studied by several groups [10,18,19]. Rapid technological improvements in supercontinuum generation (SCG), particularly with microstructured fiber, have sparked this development.…”

Section: Introductionmentioning

confidence: 99%

Spatial Manipulation of a Supercontinuum Beam for the Study of Vortex Interference Effects

et al. 2020

View full text Add to dashboard Cite

In this work, we generate optical vortices from the supercontinuum output of an ultrafast laser interacting with a micro-structured fiber. Using a segmented spatial light modulator, multiple vortices are designed and dynamically generated and shifted in order to observe their superposition in the image plane. It is shown that single-color patterns of exquisite complexity can be generated across a wide frequency range. Multi-color interference patterns are experimentally generated and compared to the results of computer simulations. Multiple vortices of varying colors are also generated and independently controlled, demonstrating that no spatial interference occurs. Experimental results are compared with theoretical and numerical simulations, showing excellent agreement.

show abstract

“…These applications of vortex beams would benefit from the versatility of a broadband coherent source of OAM light 17 . In this regard, researchers have explored free-space methods for the generation of broadband vortex light, including: nonlinear crystals 18,19 , nonlinear gases 20 , nanostructured metamaterials 21 and wideband q -plates 22,23 . However these free-space methods still harbours some technical limitations in the continuum’s wavelength coverage or in spatial dispersion.…”

Section: Introductionmentioning

confidence: 99%

Endlessly mono-radial annular core photonic crystal fiber for the broadband transmission and supercontinuum generation of vortex beams

Sharma

Pradhan

Ung

2019

Sci Rep

View full text Add to dashboard Cite

We demonstrate a new guiding regime termed endlessly mono-radial, in the proposed annular core photonic crystal fiber (AC-PCF), whereby only modes of the fundamental radial order are supported by the fiber at all input wavelengths. This attribute is of high interest for applications that require the stable and broadband guiding of mono-radial (i.e. doughnut shaped) cylindrical vector beams and vortex beams carrying orbital angular momentum. We further show that one can significantly tailor the chromatic dispersion and optical nonlinearities of the waveguide through proper optimization of the photonic crystal microstructured cladding. The analytical investigation of the remarkable modal properties of the AC-PCF is validated by full-vector simulations. As an example, we performed simulations of the nonlinear fiber propagation of short femtosecond pulses at 835 nm center wavelength and kilowatt-level peak power, which indicate that the AC-PCF represents a promising avenue to investigate the supercontinuum generation of optical vortex light. The proposed fiber design has potential applications in space-division multiplexing, optical sensing and super-resolution microscopy.

show abstract

White light generated by femtosecond optical vortex beams

Cited by 25 publications

References 42 publications

Focal beam structuring by triple mixing of optical vortex lattices

Focal beam structuring by triple mixing of optical vortex lattices

Spatial Manipulation of a Supercontinuum Beam for the Study of Vortex Interference Effects

Endlessly mono-radial annular core photonic crystal fiber for the broadband transmission and supercontinuum generation of vortex beams

Contact Info

Product

Resources

About