Zobrazeno 1 - 10
of 297
pro vyhledávání: '"M. H. Niemz"'
Autor:
M. H. Niemz
Publikováno v:
Applied Physics B Laser and Optics. 58:273-281
Experiments on the ablation of dental substance performed with picosecond laser pulses are reported for the first time. A mode locked Nd:YLF oscillator laser was used to generate 25 ps pulses at a wavelength of 1.053µm. These were seeded and amplifi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a5fd529b3e6e8e1807ba3803bb22969
https://doi.org/10.1007/bf01082621
https://doi.org/10.1007/bf01082621
Publikováno v:
Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation. 31(3)
A knife-edge method is used here to measure the beam width of the highly repetitive high-power thin disk Yb:KYW femtosecond laser (MABEL-Mannheim Biomedical Engineering Lab, University of Heidelberg, Germany). Presented in this paper is the detailed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::e203287773c55f095f199ccdcce04c83
https://pubmed.ncbi.nlm.nih.gov/17672360
https://pubmed.ncbi.nlm.nih.gov/17672360
Autor:
M. H. Niemz
Publikováno v:
Applied Physics Letters. 66:1181-1183
A model for optical breakdown is presented, that takes the effects of avalanche ionization, electron–ion recombination, and electron diffusion into account. By assuming a rectangular temporal shape of the laser pulse, an analytical solution of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::baff75204a9e40ff7474f92747ca6285
https://doi.org/10.1063/1.113850
https://doi.org/10.1063/1.113850
Publikováno v:
Laser in der Medizin Laser in Medicine ISBN: 9783540637332
Der Laser hat sich in vielen medizinischen Bereichen als Instrument zur Therapie und Diagnose etabliert. Durch die Moglichkeit beruhrungsfrei, auserst lokal und minimal- invasiv arbeiten zu konnen, stehen Laser mittlerweile in direkter Konkuirenz zu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::690c571a2c793f5c31fd4b6f7614836a
https://doi.org/10.1007/978-3-642-60306-8_86
https://doi.org/10.1007/978-3-642-60306-8_86
While short compressive stresses can readily be produced by laser ablation, the generation of pure tensile stresses is more difficult. We demonstrate that a 90° prism made of polyethylene can serve to produce short and pure tensile stresses. A compr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de4453dbb5a1f21f2885a5a19b991817
https://hdl.handle.net/20.500.14279/1483
https://hdl.handle.net/20.500.14279/1483
Autor:
M. H. Niemz, M. A. Rohwedder
Publikováno v:
Laser in Forschung und Technik / Laser in Research and Engineering ISBN: 9783540613169
Although the theoretical background of thermal lensing for cylindrical rods is well known, it is difficult to calculate the thermal focal length in a specific setup. The amount of the pump power which is absorbed by the laser material and the cooling
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d58e7dbef09cdb5c812d41237857bb9e
https://doi.org/10.1007/978-3-642-80263-8_65
https://doi.org/10.1007/978-3-642-80263-8_65
Publikováno v:
Laser in der Medizin / Laser in Medicine ISBN: 9783540613183
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95d824e821dfeb86bc7cb216bf939945
https://doi.org/10.1007/978-3-642-80264-5_103
https://doi.org/10.1007/978-3-642-80264-5_103
Publikováno v:
Laser in der Medizin / Laser in Medicine ISBN: 9783540613183
Wird ein Ultrakurzpulslaser auf eine Zahnoberflache fokussiert, so entstehen Leistungsdichten groser als 1012W/cm2, die zu Bildung eines Mikroplasmas und Abtragung von Zahnschmelz fuhren. Thermische oder mechanische Schadigungen des umliegenden Geweb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6628f30f3f8fcdc7866454d16aed0e4f
https://doi.org/10.1007/978-3-642-80264-5_105
https://doi.org/10.1007/978-3-642-80264-5_105
Publikováno v:
Schweizer Monatsschrift fur Zahnmedizin = Revue mensuelle suisse d'odonto-stomatologie = Rivista mensile svizzera di odontologia e stomatologia. 103(10)
Three different laser systems were compared according to their applicability in dentistry: a Ho:YAG laser (lambda = 2, 12 microns, pulse duration = 250 microseconds and 4 microseconds, pulse energy up to 300 mJ), an Er:YAG laser (lambda = 2,94 micron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::dc917caaf48be70aa131aca11e59c166
https://pubmed.ncbi.nlm.nih.gov/8235522
https://pubmed.ncbi.nlm.nih.gov/8235522
Publikováno v:
Applied Optics. 33:364
An Er:YAG laser at a wavelength of 2.94µm was simultaneously Q switched and actively mode locked with LiNbO(3) as an electro-optic modulator. The modulation crystal was integrated into a specially designed resonance transformer capable of generating
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec945d63922083ae4f04c94d2ce1320b
https://doi.org/10.1364/ao.33.000364
https://doi.org/10.1364/ao.33.000364