Article
Engineering, Manufacturing
Julian Zettl, Maximilian Klar, Stefan Rung, Cemal Esen, Ralf Hellmann
Summary: This study presents a comprehensive micromachining investigation of rotationally symmetric parts using femtosecond laser, exploring the influences of different parameters on ablation rate and surface roughness. The research achieved the smallest feasible feature sizes and smoothest surfaces, but encountered limitations due to laser induced periodic surface structures and discussed the variation of fluence on curved surfaces, as well as examined heat input into the material.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Optics
Chen Guo, Miguel Miranda, Ann-kathrin Raab, Anne-lise Viotti, Paulo tiago Guerreiro, Rosa Romero, Helder Crespo, Anne L'Huillier, Cord l. Arnold
Summary: We propose a single-shot measurement scheme for the carrier-envelope phase offset of ultrashort laser pulses, which can achieve high-repetition rate. The carrier-envelope phase is evaluated optically through the spectral fringes produced by f-2f nonlinear interferometry. The experimental results show excellent agreement with the simultaneous measurement using a fast line-scan camera.
Article
Materials Science, Multidisciplinary
Tobias Ullsperger, Yannick L. Wencke, Burak Yuerekli, Gabor Matthaeus, Markus Rettenmayr, Gerrit A. Luinstra, Stefan Nolte
Summary: Laser-based additive manufacturing of UHMWPE using ultrashort laser pulses at a wavelength of 1030 nm expands the processing window and improves physical properties. Multi-photon absorption processes increase absorption locally, allowing for control over pulse energy and repetition rate to achieve polymer particle fusion. Preliminary tensile tests on produced specimens show an ultimate tensile strength of 4 MPa, surpassing values obtained using a CO2 laser.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
David Brinkmeier, Daniel Holder, Andre Loescher, Christoph Roecker, Daniel J. Foerster, Volkher Onuseit, Rudolf Weber, Marwan Abdou Ahmed, Thomas Graf
Summary: Commercial ultrafast lasers with kW power levels show potential for high-volume manufacturing, but limitations such as particle shielding, atmosphere breakdown, and heat accumulation need to be addressed. Experimental validation of a thermal model for AISI 304 steel drilling highlights the importance of a critical heat accumulation threshold. A processing map summarizes these limits and provides guidance for parameter selection and laser suitability, stressing the importance of process parallelization.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Optics
Yongguang Zhao, Li Wang, Weidong Chen, Pavel Loiko, Yicheng Wang, Zhongben Pan, Hanlin Yang, Wei Jing, Hui Huang, Jiachen Liu, Xavier Mateos, Zhengping Wang, Xinguang Xu, Uwe Griebner, Valentin Petrov
Summary: This study explores Kerr-lens mode-locked solid-state laser operation at around 2 μm. By using a Tm3+-doped Lu; Sc/O-2(3) mixed sesquioxide ceramic as the gain medium, pulses as short as 58 fs are generated at around 2081 nm. The average output power reaches 220 mW with a pulse repetition rate of 84.8 MHz, and the emitted spectrum extends to > 2.2 μm, attributed to vibronic transitions of the Tm3+ ions, which are essential for generating pulses in the 50 fs range.
Article
Optics
Zhang-Lang Lin, Pavel Loiko, Huang-Jun Zeng, Wen-Ze Xue, Ge Zhang, Simone Normani, Patrice Camy, Valentin Petrov, Xavier Mateos, Haifeng Lin, Haohai Yu, Huaijin Zhang, Junhai Liu, Li Wang, Weidong Chen
Summary: We present a Kerr-lens mode-locked laser utilizing an Yb3+-doped disordered calcium lithium niobium gallium garnet (Yb:CLNGG) crystal. By pumping with a spatially single-mode Yb fiber laser at 976nm, the Yb:CLNGG laser generates soliton pulses with a duration of 31 fs at 1056.8nm, achieving an average output power of 66mW and a pulse repetition rate of approximately 77.6MHz via soft-aperture Kerr-lens mode-locking. The Kerr-lens mode-locked laser reaches a maximum output power of 203mW for slightly longer pulses of 37fs at an absorbed pump power of 0.74W, corresponding to a peak power of 62.2kW and an optical efficiency of 20.3%.
Article
Optics
Vladislav Ginzburg, Mikhail Martyanov, Dmitry Silin, Anton Kochetkov, Ivan Yakovlev, Alexey Kuzmin, Sergey Mironov, Ilya Shaikin, Sergey Stukachev, Andrey Shaykin, Efim Khazanov
Summary: Analytical expressions for the spatial spectrum of fluence fluctuations of a laser pulse propagating in a medium with Kerr nonlinearity have been obtained. It is shown that inhomogeneities with a spatial scale much larger than the critical scale of self-focusing grow insignificantly even at large values of the B-integral. Experiments using BK7 glass and a KDP crystal as a nonlinear medium confirm the obtained theoretical results. This may be interesting for pulse post-compression, frequency doubling, and other experiments using transmission optical elements in ultra-high intensity lasers.
Article
Optics
Vladislav Ginzburg, Mikhail Martyanov, Dmitry Silin, Anton Kochetkov, Ivan Yakovlev, Alexey Kuzmin, Sergey Mironov, Ilya Shaikin, Sergey Stukachev, Andrey Shaykin, Efim Khazanov
Summary: Analytical expressions for the spatial spectrum of fluence fluctuations of a laser pulse propagating in a medium with Kerr nonlinearity have been obtained. It is shown that inhomogeneities with a spatial scale much larger than the critical scale of self-focusing grow insignificantly even at large values of the B-integral. Experiments using BK7 glass and a KDP crystal as a nonlinear medium confirm the obtained theoretical results. This may be interesting for pulse post-compression, frequency doubling, and other experiments using transmission optical elements in ultra-high intensity lasers.
Article
Multidisciplinary Sciences
D. N. Makarov, K. A. Makarova, A. A. Kharlamova
Summary: This article introduces the interaction characteristics between ultrashort laser pulses and complex molecular structures, and proposes a scattering theory applicable to such substances. Examples of the scattering spectra of DNA and RNA are presented. The developed theory is more general in the scattering theory and can transition into the previously known one when the duration of the ultrashort laser pulses is considered sufficiently long.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Chen Gong, Iwao Kawayama, Hironaru Murakami, Takahiro Teramoto, Masayoshi Tonouchi
Summary: Investigating the influences of infrared pump energy and air dispersion on terahertz generation in dual-color laser filament, and observing the linear shift of optimum dual-color laser relative phase with increasing pump energy due to intensity-induced refractive index change, enhances our understanding of the theoretical framework for a higher power THz source.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Daniel Holder, Rudolf Weber, Thomas Graf, Volkher Onuseit, David Brinkmeier, Daniel J. Foerster, Anne Feuer
Summary: A simplified analytical model is presented to predict the depth progress and final hole depth obtained by laser percussion drilling in metals with ultrashort laser pulses. Experimental validation confirms the accuracy of the model for percussion drilling in stainless steel with picosecond pulses.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Review
Optics
Ivan Sytcevich, Chen Guo, Sara Mikaelsson, Jan Vogelsang, Anne-Lise Viotti, Benjamin Alonso, Rosa Romero, Paulo T. Guerreiro, Inigo J. Sola, Anne L'Huillier, Helder Crespo, Miguel Miranda, Cord L. Arnold
Summary: The dispersion scan (d-scan) technique is a simple-to-implement method for characterizing ultra-short laser pulses, with intuitive and easy-to-interpret traces and fast, robust retrieval algorithms. This review focuses on the second harmonic generation d-scan technique and compares recent implementations, demonstrating the versatility of the technique.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Review
Optics
Anne-Lise Viotti, Marcus Seidel, Esmerando Escoto, Supriya Rajhans, Wim P. Leemans, Ingmar Hartl, Christoph M. Heyl
Summary: Ultrafast lasers with high power and short pulses have a wide range of applications in material processing, photon and particle sources, light-matter interactions, and medical diagnostics. The multi-pass cell technique has significantly improved the power efficiency and enabled lasers with higher average and peak powers. The recent progress in this technique has opened up new possibilities for ultrafast lasers with tens of terawatts peak power and multiple kilowatts average power.
Article
Chemistry, Physical
M. Zukerstein, J. Hrabovsky, J. Sladek, I Mirza, Y. Levy, N. M. Bulgakova
Summary: Tubular structures and microneedles can be formed on monocrystalline silicon surface using ultrashort laser pulses. The height and morphology of the structures can be controlled by single and multi-pulsed irradiation, and the mechanisms responsible for their formation are discussed. The generated silicon microtubes and needles have applications in various fields.
APPLIED SURFACE SCIENCE
(2022)
Article
Optics
Li Ma, Chao Chen, Zijun Zhan, Qingrui Dong, Chuanfu Cheng, Chunxiang Liu
Summary: Proposed a rotationally interleaved multispiral for generating high-quality ultrashort vortices. The feasibility of multispirals in generating ultrashort vortices with symmetric distributions and flexible control of topological charges was demonstrated through theoretical analysis, numerical simulation, and experimental investigation.
Article
Hematology
Naohiro Sekiguchi, Kaori Ootsubo, Miyuki Wagatsuma, Kiyoe Midorikawa, Akihisa Nagata, Satoshi Noto, Kazuaki Yamada, Naoki Takezako
INTERNATIONAL JOURNAL OF HEMATOLOGY
(2014)
Article
Physics, Applied
Hiroo Kinoshita, Tetsuo Harada, Yutaka Nagata, Takeo Watanabe, Katsumi Midorikawa
JAPANESE JOURNAL OF APPLIED PHYSICS
(2014)
Article
Physics, Applied
A. Amani Eilanlou, Yasuo Nabekawa, Makoto Kuwata-Gonokami, Katsumi Midorikawa
JAPANESE JOURNAL OF APPLIED PHYSICS
(2014)
Article
Nanoscience & Nanotechnology
Seisuke Nakashima, Koji Sugioka, Katsumi Midorikawa, Kohki Mukai
JOURNAL OF LASER MICRO NANOENGINEERING
(2014)
Article
Engineering, Electrical & Electronic
Yuxi Fu, Katsumi Midorikawae, Fiji J. Takahashi
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2019)
Article
Multidisciplinary Sciences
Bing Xue, Yuuki Tamaru, Yuxi Fu, Hua Yuan, Pengfei Lan, Oliver D. Muecke, Akira Suda, Katsumi Midorikawa, Eiji J. Takahashi
Article
Multidisciplinary Sciences
Yu-Chieh Lin, Yasuo Nabekawa, Katsumi Midorikawa
NATURE COMMUNICATIONS
(2020)
Article
Optics
Natsuki Kanda, Tomohiro Imahoko, Koji Yoshida, Akihiro Tanabashi, A. Amani Eilanlou, Yasuo Nabekawa, Tetsumi Sumiyoshi, Makoto Kuwata-Gonokami, Katsumi Midorikawa
LIGHT-SCIENCE & APPLICATIONS
(2020)
Article
Instruments & Instrumentation
Kotaro Nishimura, Yuxi Fu, Akira Suda, Katsumi Midorikawa, Eiji J. Takahashi
Summary: In this study, an approach for energy-scaling of high-order harmonic generation in the water-window region under a neutral-medium condition was developed, leading to a nanojoule-class water-window soft x-ray harmonic beam. By combining a terawatt-class mid-infrared femtosecond laser and a loose-focusing geometry, the generated beam is more than 100 times intense compared to previously reported results.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Review
Optics
Katsumi Midorikawa
Summary: Research on isolated attosecond pulses (IAPs) based on high-order harmonic generation underwent significant changes around 2010. The use of mid-infrared optical parametric amplifier as the driving source led to improved performance of IAPs in terms of pulse width, intensity, and photon energy. However, the limited flux of IAPs still restricts their applications.
Article
Optics
Yu-Chieh Lin, Katsumi Midorikawa, Yasuo Nabekawa
Summary: In this study, we report on the measurement and control of the spatial wavefront of a subcycle optical vortex (OV) pulse by adjusting the carrier-envelope phase (CEP). By utilizing an optical system with spectral adaptability, we were able to observe the impact of CEP manipulation on the wavefront.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Hartatiek, Yudyanto, M. Wuriantika, Joko Utomo, M. Nurhuda, Masruroh, D. J. D. H. Santjojo
Summary: Hydroxyapatite was successfully synthesized from natural minerals in Indonesia and composite nanofibers were prepared by mixing it with polymeric materials, showing potential applications in bone tissue engineering.
MATERIALS TODAY-PROCEEDINGS
(2021)
Article
Nanoscience & Nanotechnology
M. Nurhuda, A. R. T. Nugraha, M. Y. Hanna, E. Suprayoga, E. H. Hasdeo
ADVANCES IN NATURAL SCIENCES-NANOSCIENCE AND NANOTECHNOLOGY
(2020)
Article
Optics
Tomoya Okino, Katsumi Midorikawa
Article
Physics, Fluids & Plasmas
M. Nurhuda, A. Rouf
