Ultra-short pulse fiber beam delivery in micromachining applications

Funck, Max; Eilzer, Sebastian; Wedel, Björn

doi:10.1117/12.2298398

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…This positive effect could be interesting for applications, where heating of the tissue is extremely critical like in dentistry or ossicle surgery. Nevertheless, despite of the investigation of such effects, for clinical application advanced fiber delivery systems that enable to transfer ultrashort laser pulses to the target tissue site have to be applied. Then, the real potential of femtosecond‐laser light application for tissue surgery could be realized for the benefit of the patient.…”

Section: Discussionmentioning

confidence: 99%

Ultrafast dynamics of hard tissue ablation using femtosecond‐lasers

Domke

Wick

Laible

et al. 2018

Journal of Biophotonics

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Several studies on hard tissue laser ablation demonstrated that ultrafast lasers enable precise material removal without thermal side effects. Although the principle ablation mechanisms have been thoroughly investigated, there are still open questions regarding the influence of material properties on transient dynamics. In this investigation, we applied pump-probe microscopy to record ablation dynamics of biomaterials with different tensile strengths (dentin, chicken bone, gallstone and kidney stones) at delay times between 1 picosecond and 10 microseconds. Transient reflectivity changes, pressure and shock wave velocities and elastic constants were determined. The result revealed that absorption and excitation show the typical well-known transient behavior of dielectric materials. We observed for all samples a photomechanical laser ablation process, where ultrafast expansion of the excited volume generates pressure waves leading to fragmentation around the excited region. In addition, we identified tensile-strength-related differences in the size of ablated craters and ejected particles. The elastic constants derived were in agreement with literature values. In conclusion, pressure-wave-assisted material removal seems to be a general mechanism for hard tissue ablation with ultrafast lasers. This photomechanical process increases ablation efficiency and removes heated material, thus ultrafast laser ablation is of interest for clinical application where heating of the tissue must be avoided.

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Section: Discussionmentioning

confidence: 99%

Ultrafast dynamics of hard tissue ablation using femtosecond‐lasers

Domke

Wick

Laible

et al. 2018

Journal of Biophotonics

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Ultrafast laser manufacturing: from physics to industrial applications

et al. 2021

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Noise-like pulses: stabilization, production, and application

Kobtsev,

Komarov

2024

J. Opt. Soc. Am. B

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Various aspects are analyzed, which are related to the generation of unusual laser pulses with stochastic internal structure known as noise-like pulses. A new mechanism of their stabilization is proposed on the basis of an analogy between a noise-like pulse and a drop of soliton liquid. The properties of noise-like pulses are considered. It is further noted that these pulses are more and more used in a number of applications (supercontinuum generation, industrial processing, medical treatment, etc.). The causes of low coherence of noise-like pulses are identified. A method of coherence degree measurement relying on the autocorrelation function of these pulses is discussed. The most promising configurations for generation of noise-like pulses are provided.

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Ultra-short pulse fiber beam delivery in micromachining applications

Cited by 3 publications

References 5 publications

Ultrafast dynamics of hard tissue ablation using femtosecond‐lasers

Ultrafast dynamics of hard tissue ablation using femtosecond‐lasers

Ultrafast laser manufacturing: from physics to industrial applications

Noise-like pulses: stabilization, production, and application

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