Industrial fiber beam delivery system for ultrafast lasers: applications and recent advances

Eilzer, Sebastian; Funck, Max; Wedel, Björn

doi:10.1117/12.2214290

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…In the last decade, ultra-short-pulse lasers gained a unique place in several industrial sectors thanks to the readiness of the laser technology, which can nowadays guarantee competitive processing time for most laser processes together with the unmatched processing quality and high resolution achievable with these types of laser sources [ 1 ]. Moreover, the possibility to deliver the laser beam through adapted optical fibers opens the way to processing of complex 3D parts or shapes by employing robotic arms guided remotely by specific software or directly by hand-guided pointers [ 2 ]. In this context, the implementation of such systems has attracted growing interest for several biomedical applications where high precision and highly localized intervention are needed [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Ablation of Bone Tissue by Femtosecond Laser: A Path to High-Resolution Bone Surgery

et al. 2021

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Femtosecond lasers allow for high-precision, high-quality ablation of biological tissues thanks to their capability of minimizing the thermal loads into the irradiated material. Nevertheless, reported ablation rates remain still too limited to enable their exploitation on a clinical level. This study demonstrates the possibility to upscale the process of fs laser ablation of bone tissue by employing industrially available fs laser sources. A comprehensive parametric study is presented in order to optimize the bone tissue ablation rate while maintaining the tissue health by avoiding excessive thermal loads. Three different absorption regimes are investigated by employing fs laser sources at 1030 nm, 515 nm and 343 nm. The main differences in the three different wavelength regimes are discussed by comparing the evolution of the ablation rate and the calcination degree of the laser ablated tissue. The maximum of the ablation rate is obtained in the visible regime of absorption where a maximum value of 0.66 mm3/s is obtained on a non-calcined tissue for the lowest laser repetition rate and the lowest spatial overlap between successive laser pulses. In this regime, the hemoglobin present in the fresh bone tissue is the main chromophore involved in the absorption process. To the best of our knowledge, this is the highest ablation rate obtained on porcine femur upon fs laser ablation.

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Section: Introductionmentioning

confidence: 99%

Ablation of Bone Tissue by Femtosecond Laser: A Path to High-Resolution Bone Surgery

et al. 2021

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“…High energy ultrashort laser pulse is widely used in industrial micromachining/ modification [1], laser surgery [2], and defense technology [3]. Despite the rapid development of high energy pico-and femtosecond laser technologies, the flexible delivery of ultrashort laser pulses via optical fiber remains a challenge [4]. Optical nonlinearities in traditional solid-core fibers, including the Kerr effect (mainly self-phase modulation, SPM), four-wave mixing, and stimulated Raman scattering (SRS), inevitably bring in nonlinear wavelength conversion, which degrades the spectral brightness of ultrashort pulses effectively.…”

Section: Introductionmentioning

confidence: 99%

Delivery of Nearly Diffraction-Limited Picosecond Laser Pulses in the Air-Filled Anti-Resonant Hollow-Core Fiber at 1 μm Wavelength

et al. 2023

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We demonstrate the damage-free delivery of nearly diffraction-limited picosecond laser pulses at 1064 nm with a maximum peak power of 3.5 MW in a 5 m air-filled anti-resonant hollow-core fiber (AR-HCF). In the air-filled AR-HCF, the transmission efficiency of picosecond pulses is degraded due to stimulated Raman scattering for the incident peak power above 3.59 MW. The temporal compression of pulses is also observed in the air-filled AR-HCF, where the self-phase modulation plays a key role in the anomalous dispersion region. By vacuuming the air in the core, a nearly constant coupling efficiency of 77% is achieved through the 5 m AR-HCF free of nonlinear effects, with M2 of the output beam less than 1.17.

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Industrial fiber beam delivery system for ultrafast lasers: applications and recent advances

Cited by 2 publications

References 7 publications

Ablation of Bone Tissue by Femtosecond Laser: A Path to High-Resolution Bone Surgery

Ablation of Bone Tissue by Femtosecond Laser: A Path to High-Resolution Bone Surgery

Delivery of Nearly Diffraction-Limited Picosecond Laser Pulses in the Air-Filled Anti-Resonant Hollow-Core Fiber at 1 μm Wavelength

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