R Grunwald
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Explore the profile of R Grunwald including associated specialties, affiliations and a list of published articles.
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24
Citations
252
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Recent Articles
1.
Liebmann M, Treffer A, Bock M, Elsaesser T, Grunwald R
Opt Express
. 2017 Oct;
25(21):26076-26088.
PMID: 29041269
Spectral anomalies of femtosecond pulses with orbital angular momentum were studied in the vicinity of singularities. Bessel-Gauss (BG) beams were generated with mode-locked Ti:sapphire oscillators and dispersion-compensated diffractive axicons acting...
2.
Grunwald R, Elsaesser T, Bock M
Sci Rep
. 2014 Nov;
4:7148.
PMID: 25413789
Light carrying an orbital angular momentum (OAM) displays an optical phase front rotating in space and time and a vanishing intensity, a so-called vortex, in the center. Beyond continuous-wave vortex...
3.
Bock M, Das S, Grunwald R
Opt Express
. 2012 Jun;
20(11):12563-78.
PMID: 22714244
The recently introduced concept of radially non-oscillating, temporally stable ultrashort-pulsed Bessel-like beams we referred to as needle beams is generalized to a particular class of highly localized wavepackets (HLWs). Spatio-temporally...
4.
Griebner U, Koch R, Schonnagel H, Grunwald R
Opt Lett
. 2009 Oct;
21(4):266-8.
PMID: 19865374
Laser performance of a diode-pumped Nd-doped multimode phosphate-glass fiber is reported. The selection of the fundamental mode in a multimode fiber is demonstrated, resulting in laser emission that is close...
5.
Bock M, Das S, Grunwald R
Opt Express
. 2009 Apr;
17(9):7465-78.
PMID: 19399125
We report the generation of programmable two-dimensional arrangements of ultrashort-pulsed fringe-less Bessel-like beams of extended depth of focus (referred to as needle beams) without truncating apertures. A sub-20-fs Ti:sapphire laser...
6.
Grunwald R, Bock M, Kebbel V, Huferath S, Neumann U, Steinmeyer G, et al.
Opt Express
. 2008 Jun;
16(2):1077-89.
PMID: 18542181
Spatio-spectral and spatio-temporal transfer and intensity propagation of truncated ultrashort-pulsed Bessel-Gauss beams were investigated. Extended needle-shaped focal zones were generated using a compact setup with a reflective small-angle axicon and...
7.
Grunwald R, Mischke H, Rehak W
Appl Opt
. 2008 Mar;
38(19):4117-24.
PMID: 18323891
Thin-film microlens arrays with high fill factors have been fabricated in a one-step process by shading a vapor beam in a vacuum-deposition apparatus with metallic meshes placed at defined distances...
8.
Grunwald R, Griebner U, Tschirschwitz F, Nibbering E, Elsaesser T, Kebbel V, et al.
Opt Lett
. 2007 Dec;
25(13):981-3.
PMID: 18064247
Multiple quasi-Bessel beams are generated by transmission of sub-30-fs pulses from a Ti:sapphire laser through refractive thin-film microaxicon arrays. Time-integrated intensity distributions at several axial positions and for pulse durations...
9.
Grunwald R, Neumann U, Kebbel V, Kuhn H, Mann K, Leinhos U, et al.
Opt Lett
. 2004 May;
29(9):977-9.
PMID: 15143646
Micro-optical structures for VUV laser beam shaping and wave-front sensing were manufactured by thin-film deposition onto CaF2 and transfer by etching. Arrays of Bessel-like F2 laser beams at a wavelength...
10.
Grunwald R, Neumann U, Griebner U, Reimann K, Steinmeyer G, Kebbel V
Opt Lett
. 2003 Dec;
28(23):2399-401.
PMID: 14680195
Combined spatially resolved collinear autocorrelation and Shack-Hartmann wave-front sensing of femtosecond laser pulses is demonstrated for the first time to our knowledge. The beam is divided into multiple nondiffracting subbeams...