Dr. Raphael Scelle Profile

Dr. Raphael Scelle

at TRUMPF Laser GmbH

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Author

Publications (5)

Proceedings Article | 2 March 2020 Paper

Micromachining flexibility by tunable ultrashort pulse duration, pulse-on-demand, and hybrid processing from single pulse to GHz burst with TruMicro Series 2000

Marc Sailer, Florian Jansen, Axel Fehrenbacher, Ulf Quentin, Florian Kanal, Raphael Scelle, Holger Diekamp, Chuong Tan, Markus Ginter, Patrick Sperling, Benjamin Fuehra, Christian Eberhardt, Dirk Sutter, Aleksander Budnicki

Proceedings Volume 11267, 112670V (2020) https://doi.org/10.1117/12.2546133

KEYWORDS: Laser ablation, Pulsed laser operation, Metals, Silicon, Micromachining, Picosecond phenomena, Ultrafast phenomena, Laser applications, Scanners

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Proceedings Article | 13 March 2019 Presentation

TruMicro 2000: Next-generation flexible ultrashort pulse fiber lasers for scientific and industrial applications (Conference Presentation)

Ulf Quentin, Florian Kanal, Aleksander Budnicki, Chuong Tan, Holger Diekamp, Florian Jansen , Raphael Scelle, Dirk Sutter

Proceedings Volume 10897, 108971M (2019) https://doi.org/10.1117/12.2511120

KEYWORDS: Ultrafast phenomena, Fiber lasers, Pulsed laser operation, Laser development, Amplifiers, Picosecond phenomena, Laser applications, Fiber amplifiers, Frequency conversion, Electronics

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Proceedings Article | 26 February 2018 Paper

Fiber laser platform for highest flexibility and reliability in industrial femtosecond micromachining: TruMicro Series 2000

Florian Jansen, Florian Kanal, Max Kahmann, Chuong Tan, Holger Diekamp, Raphael Scelle, Aleksander Budnicki, Dirk Sutter

Proceedings Volume 10512, 105122L (2018) https://doi.org/10.1117/12.2290394

KEYWORDS: Glasses, Fiber lasers, Reliability, Femtosecond phenomena, Micromachining, Silicon carbide, Silica, Laser welding, Silicon, Laser processing

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Proceedings Article | 22 February 2017 Paper

TruMicro Series 2000 sub-400 fs class industrial fiber lasers: adjustment of laser parameters to process requirements

Florian Kanal, Max Kahmann, Chuong Tan, Holger Diekamp, Florian Jansen, Raphael Scelle, Aleksander Budnicki, Dirk Sutter

Proceedings Volume 10083, 100832F (2017) https://doi.org/10.1117/12.2252433

KEYWORDS: Laser processing, Laser applications, Ultrafast lasers, Reliability, Fiber amplifiers, Oscillators, Pulsed laser operation, Patents, Laser stabilization, Process control, Fiber lasers, Picosecond phenomena, Femtosecond phenomena, Ultrafast phenomena, Mechanical engineering

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The matchless properties of ultrashort laser pulses, such as the enabling of cold processing and non-linear absorption, pave the way to numerous novel applications. Ultrafast lasers arrived in the last decade at a level of reliability suitable for the industrial environment.¹ Within the next years many industrial manufacturing processes in several markets will be replaced by laser-based processes due to their well-known benefits: These are non-contact wear-free processing, higher process accuracy or an increase of processing speed and often improved economic efficiency compared to conventional processes. Furthermore, new processes will arise with novel sources, addressing previously unsolved challenges. One technical requirement for these exciting new applications will be to optimize the large number of available parameters to the requirements of the application.

In this work we present an ultrafast laser system distinguished by its capability to combine high flexibility and real time process-inherent adjustments of the parameters with industry-ready reliability. This industry-ready reliability is ensured by a long experience in designing and building ultrashort-pulse lasers in combination with rigorous optimization of the mechanical construction, optical components and the entire laser head for continuous performance. By introducing a new generation of mechanical design in the last few years, TRUMPF enabled its ultrashort-laser platforms to fulfill the very demanding requirements for passively coupling high-energy single-mode radiation into a hollow-core transport fiber. The laser architecture presented here is based on the all fiber MOPA (master oscillator power amplifier) CPA (chirped pulse amplification) technology. The pulses are generated in a high repetition rate mode-locked fiber oscillator also enabling flexible pulse bursts (groups of multiple pulses) with 20 ns intra-burst pulse separation. An external acousto-optic modulator (XAOM) enables linearization and multi-level quad-loop stabilization of the output power of the laser.² In addition to the well-established platform latest developments addressed single-pulse energies up to 50 μJ and made femtosecond pulse durations available for the TruMicro Series 2000.

Beyond these stabilization aspects this laser architecture together with other optical modules and combined with smart laser control software enables process-driven adjustments of the parameters (e. g. repetition rate, multi-pulse functionalities, pulse energy, pulse duration) by external signals, which will be presented in this work.

Proceedings Article | 17 February 2017 Paper

Ultra-short pulse delivery at high average power with low-loss hollow core fibers coupled to TRUMPF's TruMicro laser platforms for industrial applications

S. Baumbach, S. Pricking, J. Overbuschmann, S. Nutsch, J. Kleinbauer, R. Gebs, C. Tan, R. Scelle, M. Kahmann, A. Budnicki, D. Sutter, A. Killi

Proceedings Volume 10094, 100941H (2017) https://doi.org/10.1117/12.2250753

KEYWORDS: Polarization, Optical fibers, Ultrafast lasers, Ultrafast phenomena, Laser systems engineering, Silica, Fiber coupled lasers, Pulsed laser operation, Laser applications, Materials processing, Laser ablation, Fiber lasers, Laser cutting, Laser sources

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