&gt; 6-W continuous-wave, efficient, low-noise, diode-pumped intracavity-doubled Nd:YAG laser for pumping Ti: Sapphire lasers

Tsunekane, Masaki; Taguchi, Noboru; Inaba, Humio

doi:10.1002/(sici)1520-6432(199809)81:9<11::aid-ecjb2>3.0.co;2-3

Cited by 1 publication

(2 citation statements)

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“…Considering that an all-solid-state tunable Ti:Sapphire continuous wave laser was developed objecting new sources for spectroscopic measurements of various biophotonic information [10] and for micromachining of defects and refractive index change [24]. This study is very close to others [11,24,25] and contributes with a new method for restorative and aesthetic dentistry.…”

Section: Resultsmentioning

confidence: 65%

“…High power densities can promote plasma-induced ablation achieving a very clean or well-defined tissue removal. Ultra-short laser pulses (USLP) being certainly the situation, and many femtosecond pulses applications are presently under investigation [10][11][12][13]. During the last ten years many published papers have presented the general aspects of femtosecond laser ablation [11,[14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Selective ablation of dental enamel and dentin using femtosecond laser pulses

et al. 2007

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The study of the interaction of intense laser light with matter, as well as transient response of atoms and molecules is very appropriated because of the laser energy concentration in a femtosecond optical pulses. The fundamental problem to be solved is to find tools and techniques which allow us to observe and manipulate on a femtosecond time scale the photonics events on and into the matter. Six third human extracted molars were exposed to a femtosecond Ti:Sapphire Q-switched and mode locked laser (Libra-S, Coherent, Palo Alto, CA, USA), emitting pulses with 70 fs width, radiation wavelength of 801 nm, at a constant pulse repetition rate of 1 KHz. The laser was operated at different power levels (70 to 400 mW) with constant exposition time of 10 seconds, at focused and defocused mode. Enamel and dentin surfaces were evaluated concerned ablation rate and morphological aspects under scanning electron microscopic. The results in this present experiment suggest that at the focused mode and under higher average power, enamel tissues present microcavities with higher depth and very precise edges, but, while dentin shows a larger melt-flushing, lower depth and melting and solidification aspect. In conclusion, it is possible to choose hard or soft ablation, under lower and higher average power, respectively, revealing different aspects of dental enamel and dentin, depending on the average power, fluence and distance from the focal point of the ultra-short pulse laser on the tooth surface.

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