high pulse repetition frequency ultrashort pulse laser processing of copper

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High-pulse repetition frequency ultrashort pulse laser ...

Feb 26, 2015 & 0183;& 32;High-PRF ultrashort pulse laser microprocessing of copper was investigated in a wide range of parameters. For this, a variety of high average power …Cited by: 10

High-pulse repetition frequency ultrashort pulse laser ...

& 0183;& 32;✕About this site ResearchGate is a European commercial social networking site for scientists and researchers to share papers, ask and answer questions, and find collaborators.WikipediaThis paper presents results obtained in high-pulse repetition frequency ultrashort pulse laser microprocessing of copper. In the study, a variety of ultrashort pulse laser systems supplying high ...预计阅读时间:5 分钟

High-pulse repetition frequency ultrashort pulse laser ...

✕About this site Academia.edu is an American for-profit social networking website for academics. It began as a free and open repository of academic journal articles and registered a .edu domain name when this was not limited to edu ional institutions.WikipediaHigh-pulse repetition frequency ultrashort pulse laser processing of copper. IntroductionThe recent commercial availability of high average power, high-PRF pulse repetition frequency ultrashort pulse lasers joins together excellent machining quality and high processing throughput. On one hand, the unique advantages of ultrashort laser pulses, in particular high efficiency, fast and localized energy …预计阅读时间:12 分钟

High-pulse repetition frequency ultrashort pulse laser ...

Not Available adshelp at cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

PDF High Pulse Repetition Frequency Micro Hole Drilling of ...

cently developed high pulse repetition frequency PRF laser micro drilling technology is a valuable alternative to standard processing techniques. This paper discusses laser percussion drilling of sili-con using ultrashort laser pulses at high average powers with the …

PDF High Pulse Repetition Frequency Micro Hole Drilling ...

& 0183;& 32;✕About this site ResearchGate is a European commercial social networking site for scientists and researchers to share papers, ask and answer questions, and find collaborators.WikipediaHigh Pulse Repetition Frequency Micro Hole Drilling of Silicon Using Ultrashort Pulse Laser Radiation December 2019 Journal of Laser Micro / Nanoengineering 14 3 :190-197

High-rate laser microprocessing using a polygon scanner ...

Feb 26, 2015 & 0183;& 32;High-pulse repetition frequency PRF ultrashort laser sources supplying high average laser power of more than 100 W have recently become available, allowing excellent machining quality and high processing throughput at the same time. Initial studies in this field are focused on microvias generation, 1 1. B.

Process optimization in high-average-power ultrashort ...

Jul 23, 2015 & 0183;& 32; & 0183;& 32;The volume ablation rate as obtained using a high-average-power femtosecond laser beam is plotted versus fluence for stainless steel left and copper right ; the pulse repetition rate was varied in the range between 205 and 4830 kHz; three distinct ablation regimes are indi ed. Full size image.

The role of pulse repetition rate on picosecond pulsed ...

& 0183;& 32;✕About this site ScienceDirect is a website which provides access to a large bibliographic database of scientific and medical publi ions of the Dutch publisher Elsevier. It hosts over 18 million pieces of content from more than 4,000 academic journals and 30,000 e-books of this publisher. ScienceDirect is operated by the British-Dutch publisher Elsevier.WikipediaNov 01, 2020 & 0183;& 32;Typically, commercially available ultrashort pulsed laser sources can deliver pulses with a maximum pulse energy at kHz repetition rates, whereas E p generally decreases at MHz repetition rates . Therefore, even at maximum pulse energy, fluence can be controlled by off-focus processing, i.e. increasing beam radius ω 0 , while using full energy per pulse delivered by the laser source.

High Pulse Repetition Frequency - an overview ...

& 0183;& 32;✕About this site ScienceDirect is a website which provides access to a large bibliographic database of scientific and medical publi ions of the Dutch publisher Elsevier. It hosts over 18 million pieces of content from more than 4,000 academic journals and 30,000 e-books of this publisher. ScienceDirect is operated by the British-Dutch publisher Elsevier.WikipediaOutput parameters from individual Cu lasers have been reported to cover a wide range of values. At pulsed energies of up to several millijoules per pulse, these lasers can emit pulses in the range of 10–60 ns at pulse repetition frequencies from 2 kHz to 32 kHz Webb, 1991 .

High Power Laser Processing with Ultrafast and Multi ...

& 0183;& 32;High Power Laser Processing with Ultrafast and Multi-Parallel Beams . A. Gillner1,2, ... pulse repetition frequency and scanning strategy have to be matched to the material and ablation geometry. ... high power ultrashort pulse laser sources with high industrial performance allowing short processing times.

US5720894A - Ultrashort pulse high repetition rate laser ...

A method and apparatus is disclosed for fast, efficient, precise and damage-free biological tissue removal using an ultrashort pulse duration laser system operating at high pulse repetition rates. The duration of each laser pulse is on the order of about 1 fs to less than 50 ps such that energy deposition is localized in a small depth and occurs before significant hydrodynamic motion and ...

Surface Morphologies in Ultra-short Pulsed Laser ...

20/06/2019 & 0183;& 32;The high repetition rate of current state-of-the-art ultra-short pulsed laser sources enables the deployment of processing strategies that achieve high throughput at a large scale. In contrast to longer laser pulses, interaction with sub-picosecond pulses produces a very limited Heat Affected Zone HAZ in the target 15 , leading to negligible material recast and to spatially well …

Influence of pulse repetition rate on morphology and ...

01/05/2019 & 0183;& 32;The rapid advances in laser technology make high-performance ultrashort pulse lasers readily available on the market, with pulse repetition rate up to MHz and a few hundreds Watts output power . This technology boom undoubtedly opens up more ultrashort laser processing potentials and boosts up existing appli ions.

The role of pulse repetition rate on picosecond pulsed ...

01/11/2020 & 0183;& 32;Typically, commercially available ultrashort pulsed laser sources can deliver pulses with a maximum pulse energy at kHz repetition rates, whereas E p generally decreases at MHz repetition rates . Therefore, even at maximum pulse energy, fluence can be controlled by off-focus processing, i.e. increasing beam radius ω 0 , while using full energy per pulse delivered by the laser source.

British Library EThOS: Investigation of micromachining ...

This thesis investigates laser micromachining using a high pulse repetition frequency high-PRF femtosecond fibre laser. Three different types of industrial-grade metals, Stainless steel, Copper, and Aluminium are investigated. The impact of the processing parameters on material removal is studied.

Ultrashort pulse laser polishing by continuous surface ...

01/07/2021 & 0183;& 32;Enabling high precision material processing, ultrashort pulse USP laser beam sources are increasingly applied in the field of surface structuring. In the mold and die production, three dimensional structures with a vertical depth of a few 10–500 micrometers are created by laser ablation, resulting in a surface roughness S a = 0.4–2 μm on the 3D structures.

Ultrashort Pulse Laser Micromachining AMADA WELD TECH

For polymer processing for medical devices, the most important considerations are pulse width, pulse energy and frequency, and wavelength. Pulse width. We tested pulse widths ranging from 300 femtoseconds fs to 10 picoseconds ps , using the same laser with adjustable pulse width so all other beam parameters were as equivalent as possible.

Ultrafast Laser Structuring within a Process Chain ...

& 0183;& 32;Ultrafast laser processing has shown its advantages characterized by a highly precise ablation with minimal thermal influence in many appli ions. Many investigations deal with the laser inherent parameters like pulse duration, repetition frequency and scan speed to describe their influence on the machining quality.

Study on nonthermal–thermal processing boundary in ...

04/03/2020 & 0183;& 32;Ultrashort pulse laser processing has been attracting considerable attention due to its effectiveness for precise microfabri ion and surface modifi ion 1,2,3,4,5,6,7,8,9,10 .Consequently, there is growing industrial interest in ultrashort pulse lasers as powerful manufacturing tools for modern microfabri ion, including in the automotive, aerospace, electro-optics, photonics, biomedical ...

Ultrafast laser manufacturing: from physics to industrial ...

& 0183;& 32; Aug 06, 2021 & 0183;& 32;For high laser repetition frequencies and in the case of burst mode ... Ultrashort laser processing guarantees high quality, low heat affected zone and a defect-free operating window. ... Under these conditions a removal rate of several m m 3 / s was obtained on copper and silicon with pulse energy of ...

PDF result hiGh-Power ultrashort- Pulse beam source at 515 nm

the field of micromaterial processing, silicon doping, cutting of copper, and the processing of glass and ceramic materials. Its efficient use in micromaterial processing will require the development of innovative high-speed beam deflection due to the high pulse repetition frequency. contacts Dipl.-Phys. Bastian Gronloh Phone 49 241 8906-224

PDF Regenerative amplifi ion of picosecond pulses in Nd:YAG ...

chronous amplifi ion of ultrashort dye-laser pulses.'3" 4 An attractive feature of these devices is their potential for operation at high pulse repetition rates. The regenera- tive amplifi ion process involves injection seeding a ... or copper-vapor laser-based amplifiers 6 …

PDF New random trigger-feature for ultrashort-pulsed laser ...

2 Trigger/SYNC: Some ultrafast lasers lo e the pulse picker after the seed laser; i.e., before the amplifiers. The advantage with this positioning is that pulses from the seed laser have a very high repetition rate. This gives the pulse picker more pulses to choose from, in principle making more accurate pulse timing possible.

Investigation of micromachining using a high repetition ...

This thesis investigates laser micromachining using a high pulse repetition frequency high-PRF femtosecond fibre laser. Three different types of industrial-grade metals, Stainless steel, Copper, and Aluminium are investigated. The impact of the processing parameters on material removal is studied. Finally the feasibility of the technology in three dimensional micro structuring is explored ...

PDF High power ultrafast laser design and high-order harmonic ...

Chirped pulse amplifi ion CPA has been used for over twenty years to gener-ate high power, sub-picosecond laser pulses. In a chirped pulse amplifier, an ultrashort pulse is stretched, amplified, and compressed, usually using grating stretchers and com-pressors. Despite the low efficiency 50–60% of grating compressors, this CPA scheme

PDF Ultrashort pulse generation in a semiconductor laser with ...

Semiconductor laser SL sources of ultrashort optical pulses are needed in optical communi ions systems as pulse sources for high-speed data transmission and all-optical signal processing 1 . To produce such sources, several techniques have been explored, such as gain switching 2–7 and different types of mode locking 8–15 .

Influencing the Crystallization of Glass-Ceramics by ...

A picosecond laser with central wavelength at 1064 nm, 10 ps pulse duration and a variable pulse repetition rate from 50 kHz to 8.2 MHz was used. A pulse on demand module enabled the pulse picking. The beam expander with a magnifi ion of two was necessary to reduce the power density on the mirrors and in the objective.

Micro-engraving Appli ion Of Laser In Industrial Gravure ...

In order to do image processing in the most economical time, lasers are required to have high pulse repetition rate and high average power. For large-scale micro-engraving by thermo-optical ablation, the most effective method is to use a pulsed laser beam, whose single laser pulse …

Pico-second Lasers - Sintec Optronics

PSZ Series Diode-pumped High-frequency Pico-second Lasers. The diode pumped pico-second lasers is a laser with pulse width <15ps, pulse repetition rate 10-100kHz, beam quality factor M2<1.2. The laser is the first choice for sapphire cutting , LED etching, remote rangefinding, physics and chemistry, material science, photonics. Features

L& 246;schner, Udo

High-pulse Repetition frequency ultrashort pulse laser processing of copper. Journal of Laser Appli ion. 2015; High-rate laser microprocessing using a polygon scanner system. Journal of Laser Appli ion. 2015; Hochgeschwindigkeits-Laserstrahlabtragschneiden von …

PDF Photomechanical Modifi ion of ZnS Micro-Crystal to ...

stirrer. Femtosecond laser pulse train wavelength: 800 nm, pulse duration: 250 fs, repetition frequency: 1 kHz from chirped pulse amplified Ti -sapphire laser system Cyber laser, IFRIT SP-1 was focused at the top liquid- air interface of the sample through a 10 cm convex lens Fig. 2 a .

Laser cleaning TRUMPF

Laser cleaning a tyre mould. The high-performance short-pulse lasers from the TruMicro Series 7000 are based on disk laser technology and combine short pulses with high pulse energies, even with high frequencies. This allows you to remove layers and contamination with …

CO₂ Laser Mirrors

Dec 15, 2020 & 0183;& 32;Pulse length of your laser; Pulse repetition frequency prf of your laser; Beam diameter of your laser 1/e 2 Approximate intensity profile of your beam e.g., Gaussian The energy density of your beam should be calculated in terms of J/cm 2. The graph to the right shows why expressing the LIDT as an energy density provides the best metric ...

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high pulse repetition frequency ultrashort pulse laser processing of copper