Results 1 to 10 of about 1,856,713 (355)

An update on fractional picosecond laser treatment: histology and clinical applications. [PDF]

Lasers Med Sci, 2023
Picosecond lasers have a very short pulse duration and a high peak power density. When fractional optical delivery systems are attached to picosecond lasers, they generate an array of concentrated microspots with a high fluence surrounded by areas with a
Zhou Y, Hamblin MR, Wen X.
europepmc   +2 more sources

Effects of picosecond laser on the multi-colored tattoo removal using Hartley guinea pig: A preliminary study. [PDF]

PLoS ONE, 2018
Picosecond lasers have emerged as the leading technology for tattoo removal due to their shorter pulse lengths. To clarify the features of picosecond lasers, we compared picosecond and nanosecond lasers in their ability to remove multi-colored tattoo in ...
Mi Soo Choi, Hee Seok Seo, Jong Gu Kim, Sung Jay Choe, Byung Cheol Park, Myung Hwa Kim, Seung Phil Hong   +6 more
doaj   +2 more sources

Picosecond laser filamentation in air [PDF]

New Journal of Physics, 2016
The propagation of intense picosecond laser pulses in air in the presence of strong nonlinear self-action effects and air ionization is investigated experimentally and numerically.
Andreas Schmitt-Sody, Heiko G Kurz, Luc Bergé, Stefan Skupin, Pavel Polynkin   +4 more
doaj   +5 more sources

Green Picosecond Laser Machining of Thermoset and Thermoplastic Carbon Fiber Reinforced Polymers

Micromachines, 2021
There has been an increase in demand for the development of lightweight and high-strength materials for applications in the transportation industry. Carbon fiber reinforced polymer (CFRP) is known as one of the most promising materials owing to its high ...
Insung Choi, Su-Jin Lee, Dongsig Shin, Jeong Suh   +3 more
doaj   +2 more sources

Microstructure Formations Resulting from Nanosecond and Picosecond Laser Irradiation of a Ti-Based Alloy under Controlled Atmospheric Conditions and Optimization of the Irradiation Process [PDF]

Micromachines, 2023
This paper presents a study and comparison of surface effects induced by picosecond and nanosecond laser modification of a Ti6Al4V alloy surface under different ambient conditions: air and argon- and nitrogen-rich atmospheres.
Dubravka Milovanović, Boris Rajčić, Dragan Ranković, Biljana Stankov, Miha Čekada, Jovan Ciganović, Dragica Đurđević-Milošević, Zoran Stević, Miroslav Kuzmanović, Tatjana Šibalija, Sanja Petronić   +10 more
doaj   +2 more sources

A split-face study evaluating the efficacy of a topical antioxidant cream containing tocotrienol after 1064-nm picosecond Nd:YAG laser treatment for environment-induced skin pigmentation [PDF]

Archives of Aesthetic Plastic Surgery, 2021
Background This study aimed to evaluate the efficacy and safety of a topical antioxidant cream containing tocotrienol after 1064-nm picosecond neodymium-doped yttrium aluminum garnet (Nd:YAG) laser treatment for environment-induced skin pigmentation ...
Moon Seok Kang, Jun Hyun Kim, Seung Min Nam, Eun Soo Park   +3 more
doaj   +1 more source

COMPACT PICOSECOND DIODE LASERS

Instruments and Experimental Techniques, 2022
This article presents the electrical circuit, a description of the design, and results of measurements of the radiative watt–ampere and time characteristics of compact inexpensive emitters based on commercial laser diodes with wavelengths from 405 to 850 nm, which operate in the picosecond (70–180 ps) and nanosecond (0.69–1.2 ns) modes.
Voropai, E. S., Ermalitskaia, K. F., Ermalitski, F. A., Rad’ko, A. E., Rzheutsky, N. V., Samtsov, M. P.   +5 more
openaire   +2 more sources

Comparison of 1550-nm nonablative fractional laser versus 755-nm picosecond laser with diffractive lens array for atrophic facial acne scars in asian skin: A prospective randomized split-face clinical study

Dermatologica Sinica, 2021
Background: Nonablative lasers are popular alternatives for atrophic acne scar treatment in Asia. Objectives: We aimed to compare the efficacy and safety between 1550-nm nonablative fractional laser (NAFL) and 755-nm picosecond laser with diffractive ...
Mao-Ying Lin, Sindy Hu, Chrang-Shi Lin, Wen-Hung Chung   +3 more
doaj   +1 more source

Comparison of the efficacy and safety of picosecond Nd:YAG laser (1,064 nm), picosecond alexandrite laser (755 nm) and 2% hydroquinone cream in the treatment of melasma: A randomized, controlled, assessor-blinded trial

Frontiers in Medicine, 2023
BackgroundIncreasing numbers of studies demonstrated that picosecond lasers (Picos) were effective and safe for melasma. However, A limited number of randomized controlled trials (RCTs) regarding Picos contribute to a modest level of evidence.
Surong Liang, Shuai Shang, Wensi Zhang, Ansheng Tan, Boyang Zhou, Xueling Mei, Linfeng Li   +6 more
doaj   +1 more source

Picosecond ultrasonics with miniaturized semiconductor lasers [PDF]

Ultrasonics, 2020
There is a great desire to extend ultrasonic techniques to the imaging and characterization of nanoobjects. This can be achieved by picosecond ultrasonics, where by using ultrafast lasers it is possible to generate and detect acoustic waves with frequencies up to terahertz and wavelengths down to nanometers.
Kobecki, Michael, Tandoi, Giuseppe, Di Gaetano, Eugenio, Sorel, Marc, Scherbakov, Alexey V., Czerniuk, Thomas, Schneider, Christian, Kamp, Martin, Höfling, Sven, Akimov, Andrey V., Bayer, Manfred   +10 more
openaire   +6 more sources