نتایج جستجو برای: femtosecond laser

تعداد نتایج: 188297  

2015
E. Cunningham Y. Wu Zenghu Chang

Articles you may be interested in Generation of high-energy tunable multicolored femtosecond sidebands directly after a Ti:sapphire femtosecond laser Appl. A high-flux high-order harmonic source Rev. Generation of high-flux attosecond extreme ultraviolet continuum with a 10 TW laser Appl.

Journal: :Journal of refractive surgery 2006
Yaron S Rabinowitz Xiaohui Li Teresa S Ignacio Ezra Maguen

PURPOSE To determine the efficacy of INTACS insertion using a femtosecond laser in the treatment of keratoconus and to compare it to the technique using a mechanical spreader. METHODS INTACS were inserted in 10 eyes using the mechanical spreader to create the channels and subsequently on another 20 eyes using the femtosecond laser. Uncorrected (UCVA) and best spectacle-corrected visual acuity...

Journal: :Journal of the Japan Society for Precision Engineering 2006

Journal: :Journal of the European Optical Society: Rapid Publications 2023

Medical femtosecond laser devices are used in dermatology for non-linear high-resolution imaging to obtain non-invasive and label-free optical skin biopsies (multiphoton tomography) as well ophthalmology refractive corneal surgery cataract surgery. Applications of commercial certified multiphoton tomographs include early detection cancer within minutes by two-photon autofluorescence coenzymes m...

2011
Pavel Polynkin Jerome V. Moloney

Experiments on gas breakdown by powerful optical pulses date back to the early days of lasers. The following development resulted in the generation of dense plasma columns up to several tens of meters in length. Pulsed neodymium-glass and CO2 lasers used in these demonstrations had pulse energies of several hundred Joules. Optical breakdown with high-energy nanosecond (or longer) laser pulses i...

Journal: :Journal of cataract and refractive surgery 2011
Nick Mamalis

Cataract surgery techniques have evolved from intracapsular cataract surgery to extracapsular cataract surgery (ECCE) to phacoemulsification, with a progressive decrease in the size of the surgical wound and increased safety and predictability of the surgical procedure. Cataract surgical techniques and intraocular lens (IOL) technologies continue to evolve to provide patients with the optimum p...

Journal: :Annalen der Physik 2014

Journal: :Optics express 2010
Frédéric Madani-Grasset Yves Bellouard

The use of low-energy femtosecond laser beam combined with chemical etching has been proven to be an efficient method to fabricate three-dimensional structures in fused silica. For high-volume application, this technology--like other serial processes--suffers from a moderate production rate. Here, we show that femtosecond laser can also be employed to fabricate silica molds and other patterned ...

2015
F. Hashimoto S. Richter S. Nolte Y. Ozeki K. Itoh

We employed time-resolved micro-Raman spectroscopy to investigate the temperature dynamics inside glass during high-repetition-rate femtosecond laser microprocessing. We measured the temperature evolutions as functions of the distance from the focus of femtosecond laser pulses, although it was difficult to acquire Raman spectra at locations near the focus due to the onset of strong background e...

Journal: :Journal of cataract and refractive surgery 2006
Gonzalo Muñoz César Albarrán-Diego Hani F Sakla Jaime Javaloy Jorge L Alió

PURPOSE To describe the incidence of transient light-sensitivity syndrome (TLSS) after laser in situ keratomileusis (LASIK) with the femtosecond laser and to identify preventive strategies. SETTING Hospital NISA Virgen del Consuelo, Valencia, Spain. METHODS The first 765 eyes operated on with the 15 KHz femtosecond laser were prospectively analyzed for subjective complaints and clinical fin...

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