Interface morphology and gas production by a refractive 347 nm ultraviolet femtosecond laser: Comparison with established laser systems

Hammer, Christian; Kunert, Kathleen S.; Zhang, Yao; Lörner, Johannes; Wüllner, Christian; Rothuber, Elia L.; Paulsen, Friedrich; Seiler, Theo

doi:10.1016/j.jcrs.2018.05.030

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…40 The gas bubble produced from the first pass might expand and displace the collagen fibrils; this could cause the second pass to deviate from the planned incision and increase the refractive variation. 41 Two eyes (9%) had undercorrection of up to À2.00 diopters (D) after immediate re-SMILE. 6 Although waiting 1 hour to 2 hours after suction loss for the resolution of gas bubble before attempting re-SMILE may increase the accuracy of the second pass, the authors reported 100% of the eyes in the suction loss group were within ±1.00 D of the target correction after same-day re-SMILE.…”

Section: Discussionmentioning

confidence: 99%

Options and results in managing suction loss during small-incision lenticule extraction

Wan

Lin

Lai³

et al. 2021

J Cataract Refract Surg

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Suction loss is an intraoperative complication in small-incision lenticule extraction (SMILE) that presents a management challenge for the refractive surgeon. The purpose of this review is to evaluate the visual, refractive, and wavefront outcomes after suction loss across the different stages of SMILE with various respective surgical treatments. Surgical management options include immediate re-SMILE by redocking or delayed re-SMILE, with or without adjustment of the laser parameters, conversion to femtosecond laser in situ keratomileusis, transepithelial photorefractive keratectomy, refractive lenticule extraction, or pseudo-SMILE. The restart treatment module on VisuMax provides appropriate retreatment recommendation. Most retreatment options for suction loss, immediate or delayed, resulted in effective, safe, and predictable outcomes, and patients were satisfied with their outcomes. Based on available level II evidence, immediate re-SMILE with or without adjustment to the laser settings achieve favorable visual and refractive outcomes in handling this intraoperative complication across all stages of SMILE.

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Section: Discussionmentioning

confidence: 99%

Options and results in managing suction loss during small-incision lenticule extraction

Wan

Lin

Lai³

et al. 2021

J Cataract Refract Surg

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“…Ultra-short ultraviolet (UV) pulses with high peak power have a wide range of applications in material processing [1], biology [2], spectroscopy [3], ultrafast molecular dynamics [4], and so on. In the field of Free Electron Laser (FEL) [5], to match the emitting requirement of photocathode, high power ultrashort pulse at UV wavelength range are often used as the driving laser source [5].…”

Section: Introductionmentioning

confidence: 99%

Fourth harmonic generation characteristics of post-compressed ultrashort pulses

Zhihang

Li²,

Li³

et al. 2022

Thirteenth International Conference on Information Optics and Photonics (CIOP 2022)

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Ultrafast ultraviolet UV lasers have significant applications in biological, industrial, and other fundamental research. For example, ultrafast laser with wavelength at 257 nm is the photon-injector driving source for next generation high repetition rate free-electron laser facilities. In this manuscript, we investigate the fourth harmonic generation of post-compressed IR pulses and suggest a high-performance sub-100 fs UV pulse generation method. Self-phase modulation plays a major role in spectral broadening in the post-compression, allowing the FHG to have a broader spectrum and achieve a shorter pulse duration, which will shrink the footprint of pulse stretching afterwards by a factor of 5. In this study, we employ a commercial laser as the fundamental source, which generates 50 μJ pulse energy, and 350 fs pulse duration at wavelength of 1030 nm. First, the pulse duration is compressed down to 66 fs after thin plate compression. Then we theoretically study the FHG after the nonlinear compression. The simulation shows, A UV pulse of 3.43 μJ, 118 fs was finally produced using two cascaded BBO crystals with thicknesses of 3 mm and 0.5 mm. As an alternative, a UV pulse lasting 1.37 μJ, 98 fs was produced using two BBO crystals with thicknesses of 3 mm and 0.2 mm. Additionally, we discovered that this approach does not result in a decrease in the FHG conversion efficiency compared with the un-compressed pulse.

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Analysis of corneal stromal roughness after iFS 150 kHz and LenSx femtosecond LASIK flap creation in porcine eyes

Gros-Otero

Ketabi

Cañones-Zafra

et al. 2019

Graefes Arch Clin Exp Ophthalmol

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Interface morphology and gas production by a refractive 347 nm ultraviolet femtosecond laser: Comparison with established laser systems

Abstract: Ultraviolet laser lenticule extraction seems promising. The interface quality was similar to that of the clinical Visumax system while gas production was reduced significantly.

Cited by 6 publications

References 25 publications

Options and results in managing suction loss during small-incision lenticule extraction

Options and results in managing suction loss during small-incision lenticule extraction

Fourth harmonic generation characteristics of post-compressed ultrashort pulses

Analysis of corneal stromal roughness after iFS 150 kHz and LenSx femtosecond LASIK flap creation in porcine eyes

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