Ultrashort Laser Pulses Machining

Samad, Ricardo Elgul; Machado, Leandro Matiolli; Vieira, Nilson D.; Rossi, Wagner de

doi:10.5772/46235

Cited by 2 publications

(2 citation statements)

References 112 publications

(131 reference statements)

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“…The maximum absorption peak of water around 3 µm must not be omitted due to its significant impact on the role of lasers in various fields of medicine, such as ophthalmology, dermatology, urology, and others. The farther end of the mid-IR region is most useful in industry, due to absorption in various polymers and therefore is the wavelength region of choice for applications such as welding, cutting, drilling, and micromachining of plastics [3].…”

Section: Introductionmentioning

confidence: 99%

Double-pass optical parametric generator pumped by Yb thin-disk laser for efficient 1.4–2.9 µm mid-IR radiation generation

et al. 2023

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Many different fields benefit from the usage of light sources emitting in the mid-infrared wavelength range (2–10 µm). A rising need for precise and fast sources in the mid infrared (mid-IR) is reflected in the development of a high-power, picosecond mid-IR source capable of generation at high repetition rates. In this work, we present the optimization of an optical parametric generator, pumped by a 3 W portion of total power of the Yb:YAG thin-disk laser (1.3 ps, 90 kHz, 90 W) by comparing a single-pass and double-pass arrangement output parameters in terms of output power dependences on input power, efficiency, beam profiles, stability, and spectra. The output tunability of both arrangements spanned from 1459 nm to 2891 nm, with the upper limit being influenced by the limited transmission of the dichroic components used in the setup above 2700 nm. It was shown that the double-pass arrangement increases the output power, from 17 mW in the single-pass arrangement to 193 mW in the double-pass arrangement at 1459 nm, resulting in over ten-fold output power increase.

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Section: Introductionmentioning

confidence: 99%

Double-pass optical parametric generator pumped by Yb thin-disk laser for efficient 1.4–2.9 µm mid-IR radiation generation

et al. 2023

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“…Mechanism and technics of material removing and ablation for micro and nano-processing, especially microdrilling and structuring applications, using ultra-short pulses laser irradiation have been intensively studied in recent years [3][4][5][6][7] . One of the most efficient and accurate drilling technology namely helical drilling was reported a few years ago [8] .…”

Section: Introductionmentioning

confidence: 99%

High-precision Helical Cutting Using Ultra-short Laser Pulses

Zibner

Fornaroli

et al. 2014

Physics Procedia

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The use of a helical optics to drill micro holes in fuel injectors and spinning nozzles has already demonstrated great advantages like high precision and flexibility. Due to the laser beam rotation on a helical path, the hole-geometry is almost independent from the beam shape. By slightly manipulating the beam path inside the optics, positive and negative tapered as well as straight cylindrical holes can be achieved. If the work-piece is moved relatively to the helical-optics, a helical-cutting process is performed. Compared to direct cutting technologies, helical-cutting can meet higher requirements in terms of roughness and taper of the kerf. By using a helical optics with ultra-short laser pulses, micro cutting experiments on metal and sapphire sheets were performed. As a result of the laser beam helical movement, the roughness of the cutting kerf in metal is below 1 µm, and a taper less than 1 degree could be achieved with a cutting speed 10 mm/min. Recast layer and heat affected zone around the exits are negligible.

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Ultrashort Laser Pulses Machining

Cited by 2 publications

References 112 publications

Double-pass optical parametric generator pumped by Yb thin-disk laser for efficient 1.4–2.9 µm mid-IR radiation generation

Double-pass optical parametric generator pumped by Yb thin-disk laser for efficient 1.4–2.9 µm mid-IR radiation generation

High-precision Helical Cutting Using Ultra-short Laser Pulses

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