Program

Start	End	Session No.	Title	Speaker	Description
9:00	9:10		SLPC 2018 Opening Remark	Masahiro Tsukamoto JWRI, Osaka University, Japan	Laser pulses are a versatile tool in microelectronics and recently have become attractive in flexible electronics. New processes have been developed to selectively ablate or modify the thin films used in this application area.
9:10	9:50	SLPC1-1Plenary	Laser processing in flexible electronics	Andreas Ostendorf, Maren Kasischke Applied Laser Technologies, Ruhr-University Bochum, Germany	Laser pulses are a versatile tool in microelectronics and recently have become attractive in flexible electronics. New processes have been developed to selectively ablate or modify the thin films used in this application area.
9:50	10:30	SLPC1-2Plenary	Blue diode laser development for advanced materials processing	Masahiro Tsukamoto Joining and Welding Research Institute, Osaka University, Japan	We have developed a high power blue diode laser with the wavelength of 450 nm. Output power of the laser was 100W. The laser was installed in a 3D printing system based on selective laser melting.
10:30	11:00	Break

Start	End	Session No.	Title	Speaker	Description
11:00	11:30	SLPC2-1Invited	Latest trends of IoT and additive laser manufacturing	Bastian Becker¹, Antonio Candel-Ruiz¹, Stephan Manz¹, Dirk Wagner² ¹Sales Services, Lasertechnology, TRUMPF Laser- und Systemtechnik GmbH, Germany, ²TRUMPF Laser GmbH, Germany	Internet of Things and Industry 4.0 are common words in today’s industry. Connecting and getting data and information out of machines and lasers. Making data transparent for analysis, resulting in measures to increase productivity and availability of the production.
11:30	12:00	SLPC2-2Invited	Toward cool laser manufacturing	Yohei Kobayashi, Shuntaro Tani The University of Tokyo, Japan	The laser manufacturing is getting more and more important to realize a smart society. Here we discuss how to make an automatic system to optimize a parameters of the laser machining.
12:00	13:30	Break

Start	End	Session No.	Title	Speaker	Description
13:30	13:45	SLPC3-1	Development of sputter-free selective laser melting for titanium plate fabrication	Yuji Sato¹, Masahiro Tsukamoto¹, Takahisa Shobu², Takaya Nishi³, Yorihiro Yamashita⁴, Ritsuko Higashino¹, Hitoshi Nakano³, Nobuyuki Abe¹ ¹JWRI, Osaka University, Japan, ²Japan atomic energy agency, Japan, ³Graduate School of Science and Engineering, Kindai University, Japan, ⁴Industrial Research Institute of Ishikawa, Japan	Titanium plates were fabricated by SLM in vacuum owing to reduce of amount of sputter generation. It was found that the sputtering was inhibited when the T the base plate temperature was raised.
13:45	14:00	SLPC3-2	Development of selective laser melting system applied to fabricate controllable thin-walled metal microstructures	Chung-Wei Cheng¹, Siang-Yang Wu¹, Mi-Ching Tsai² ¹Department of Mechanical Engineering, National Chiao Tung University, Taiwan, ²Department of Mechanical Engineering, National Cheng Kung University, Taiwan	This study developed a laboratory selective laser melting (SLM) system, presented thin-walled metal microstructures from maraging steel powders with different geometric shapes by sequentially layering different single laser melted tracks in a vertical direction.
14:00	14:15	SLPC3-3	Advanced beam diagnostics for additive manufacturing laser scanner systems	Andreas Koglbauer, Stefan Wolf, Otto Märten, Reinhard Kramer Research & Development, PRIMES GmbH, Germany	Via a novel beam diagnostic approach for 3D scanners, we are able to determine not only the beam width, but reconstruct the scanned path (orientation, position, and length) of the laser in the measurement plane.
14:15	14:30	SLPC3-4	Effect of laser power on molten pool track and microstructure in laser metal deposition of 316L stainless steel	Manjaiah Mallaiah, Jean Yves Hascoet, Matthieu Rauch Department of Mechanics, Materials and Civil Engineering, Centrale Nantes, France	This paper presents the grain structures, solidification tracks and micro-hardness evolution of 316L stainless steel material after melt depositions at different laser powers.
14:30	14:45	SLPC3-5	The in situ laser-induced synthesis of nickel-gold microstructures for non-enzymatic sensing of glucose	Ilya I Tumkin, Evgeniia M Khairullina, Ilia A Aliabev, Vladimir A Kochemirovsky, Maxim S Panov Institute Chemistry, Saint Petersburg State University, Russia	In the current work the conductive bimetallic microstructures based on nickel and gold with high sensor activity towards glucose were synthesized using the in situ laser-induced metal deposition technique (LCLD)
14:45	15:00	SLPC3-6	Development of non-molten pool type laser coating	Yorihiro Yamashita¹, Yoshinori Funada¹, Masahiro Tsukamoto², Nobuyuki Abe², Yuji Sato², Yuu Sakon³, Kazuki Makinoshima³ ¹Machinery and Metal, Industrial Research Institute of Ishikawa, Japan, ²Laser Process, Joining and Welding Research Institute, Osaka University, Japan, ³Development Section, Muratani Machine Inc, Japan	Developed non-molten pool type laser coating process is possible to form a thin layer without dilution and shape distortion. Testing using Ni-based SFA powder showed that it is possible for a thickness of only 0.1mm.
15:00	15:15	Break

Start	End	Session No.	Title	Speaker	Description
15:15	15:45	SLPC4-1Invited	Latest diode laser technology and its industrial applications	Markus A. Ruetering, Christoph Ullmann, Matthias Weinbach Laserline GmbH, Germany	The paper will review the actual industrial applications with diode lasers as well as the new approach with 450 nm blue radiation
15:45	16:00	SLPC4-2	Development of high-energy-class laser processing technologies using a laser-diode pumped 100-J pulse-shaped laser system	Yoshio Mizuta, Takashi Kurita, Takeshi Watari, Yuki Kabeya, Takashi Sekine, Yoshinori Tamaoki, Koichi Iyama, Yasuki Takeuchi, Takaaki Morita, Masateru Kurata, Yuma Hatano, Kazuki Kawai, Yuki Muramatsu, Takuto Iguchi, Yoshinori Kato Central Research Laboratory Industrial development Center Power Laser Development Group, HAMAMATSU PHOTONICS K.K., Japan	We have started to develop a laser-diode pumped cryogenically-cooled Yb:YAG laser system capable of generating 100-J pulse energy combined with a material processing system.
16:00	16:15	SLPC4-3	Micromachining advances with hybrid fiber lasers	Rajesh S Patel¹, James Bovatsek¹, Herman Chui² ¹Applications Engineering, Spectra-Physics, USA, ²Product Marketing, Spectra-Physics, USA	A new class of hybrid fiber lasers created by combining fiber and diode pumped solid state laser technologies can deliver both high machining quality and throughput
16:15	16:30	SLPC4-4	Silicon carbide and gallium nitride wafer dicing technique	Egidijus Vanagas, Dziugas Kimbaras, Aivaras Kazakevicius, Karolis Zilvinas Bazilevicius Evana Technologies, UAB, Lithuania	Effective and rapid laser dicing technique for semiconductor devices formed on SiC and GaN substrates with a one pass process. The technique, where thermal stress is induced by delivering at least two ultra-short pulsed-beams.
16:30	16:45	SLPC4-5	Layer accurate controlled laser ablation of CFRP using optical distance measurement	Daniel Holder, Rudolf Weber, Thomas Graf Institut für Strahlwerkzeuge (IFSW), University of Stuttgart, Germany	Optical distance measurement was used to enable controlled and layer accurate laser ablation of CFRP. The reconstructed surface topography by the distance measurement allowed the determination of the fiber direction with an accuracy less than ±5°.
16:45	17:00	SLPC4-6	Heat acumulation controlled surface structuring of stainless steel	Sebastian Faas¹, Corrado Sciancalepore², Rudolf Weber¹, Luca Romoli³, Thomas Graf¹ ¹IFSW, University of Stuttgart, Germany, ²National Interuniversity Consortium of Materials Science, INSTM-Research Unit of Parma, Italy, ³Department of Engineering and Architecture, University of Parma, Italy	Stainless steel 316L was structured using the mJ-ps-laser of the IFSW. Structuring rates of up to 500 mm²/s were achieved. A novel simple analytical model was used to calculate the deposited heat during processing.

Start	End	Session No.	Title	Speaker	Description
13:30	13:45		Opening Remarks	Masahiro Tsukamoto ¹, Takahisa Jitsuno¹, Takunori Taira ² ¹Osaka Univ., Japan, ²Inst. material Science, Japan
13:45	14:15	SLPC5j-1Invited	Ab-initio large-scale simulation for initial stage of laser damage in transparent nano-materials	Kazuhiro Yabana¹, Mitsuharu Uemoto¹, Shunsuke A. Sato², Yuta Hirokawa³, Taisuke Boku¹ ¹Center for Computational Sciences, University of Tsukuba, Japan, ²Max Planck Institute for the Structure and Dynamics of Matter, Germany, ³Graduate School of Systems and Information Engineering, University of Tsukuba, Japan	We calculate energy transfer from femtosecond laser pulse to 3D nano-materials solving Maxwell equations for light electromagnetic fields and ab-initio time-dependent Kohn-Sham equation for quantum electron dynamics simultaneously.
14:15	14:45	SLPC5j-2Invited	High throughput surface texturing of embossing rollers with fs-laser and polygon line scanner in fully synchronized mode	Beat Jaeggi^{1, 2}, Adrian Stirnimann¹, Guido Hennig³, Beat Neuenschwander¹ ¹Institute for Applied Laser, Photoncis and Surface technolpogies ALPS, Bern University of Applied Sciences, Switzerland, ²LASEA Switzerland, Switzerland, ³Daetwyler-Graephics AG, Switzerland	The combination of a polygon line scanner with a rotating roller, fully synchronized to a new high power fs laser, allows laser micromachining with highest precision and high throughput. We will present actual results from the European APPOLO Project.
14:45	15:15	PLDj-1Invited	Mechanisims of laser damage in optical components for PW-class laser systems	Stavros G Demos, Alexei A Kozlov, Kyle Kafka, James B Oliver, Semyon Papernov, Brittany Hoffman, Terrance J Kessler, Sheryl M Gracewski, John C Lambropoulos University of Rochester, USA	We investigate the mechanisms of laser-induced damage and ensuing material modifications on multilayer dielectric mirrors and gratings. Thermomechanical modeling combined with analysis of damage morphologies provides insight into the energy deposition and relaxation pathways.
15:15	15:45	Break

Start	End	Session No.	Title	Speaker	Description
15:45	16:15	PLDj-2Invited	UV-induced aging leading to laser damage in the bulk of fused silica	Frank R Wagner, Alexandre Beaudier, Jean-Yves Natoli Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel, France	Results on material modifications observed by photoluminescence in the bulk of fused silica during UV S-on-1 tests show modifications in the color center concentrations before the occurrence of damage and help predicting fatigue damage.
16:15	16:45	LICj-1Invited	Ultrafast laser direct writing of periodic nanostructure in bulk semiconductor crystals	Yasuhiko Shimotsuma Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Japan	Self-assembled periodic nanostructures in bulk semiconductor crystals are photoinduced by ultrafast laser pulses. The formation mechanism of these nanostructures in bulk semiconductor crystal could be influenced by the transition type and the bandgap energy. Particularly, the electronic stress induced by the deformation potential of electronic states is considered to be one of important key for nanostructure formation.
16:45	17:15	LICj-2Invited	One-shot 3D giant-pulse micro-laser processing by LCOS direct control	Yasuki Sakurai^{1, 2}, Yuji Hotta¹, Ryohei Otowa¹, Masashi Nishitateno¹, Lihe Zheng², Hiroshi Yamamoto², Takunori Taira² ¹Santec corporation, Japan, ²Institute of molecular science, Japan	We propose the one-shot 3D material processing with spatially modulated giant-pulse micro-laser output by LCOS direct control. The fine structured organic semiconductor film has been fabricated by MW-class 532nm beam exposer.
17:15	17:20		Closing of Joint Session

Start	End	Session No.	Title	Speaker	Description
9:00	9:15	SLPC7-1	Laser fluence and time-interval dependences of ablation suppression for titanium by double-pulse femtosecond laser irradiation	Yuki Furukawa^{1, 2}, Sadaoki Kojima¹, Kensuke Teramoto^{1, 2}, Shunsuke Inoue^{1, 2}, Masaki Hashida^{1, 2}, Shuji Sakabe^{1, 2} ¹Advanced Research Center for beam Science, Institute for Chemical Research, Kyoto University, Japan, ²Graduate School of Science, Kyoto University, Japan	Double-pulse femtosecond laser pulses are irradiated on a titanium plate for various combinations of fluence. The depths of laser-produced craters are measured. The ablation suppression is observed by choosing appropriate fluence and time interval combination.
9:15	9:30	SLPC7-2	Deep drilling of metals with ultra-short laser pulses	Daniel Johannes Förster, Daniel Holder, Thomas Arnold, Rudolf Weber, Thomas Graf Institut für Strahlwerkzeuge IFSW, University of Stuttgart, Germany	A simplified model of the percussion drilling process to predict the achievable drilling depth was derived and systematically investigated. Based on this, a hole with a drilling depth of 10 mm could be achieved.
9:30	9:45	SLPC7-3	Formation of microstructures on Ni film surface by nanosecond laser irradiation	Kazuki Koda¹, Wataru Kobayashi², Hiro Imai², Masahiro Tsukamoto³ ¹Department of Mechanical Engineering, Osaka University, Japan, ²DENSO CORPORATION, Japan, ³Joining and Welding Research Institute, Osaka University, Japan	The formation of microstructures on a Ni film surface by nanosecond laser irradiation was investigated. The microstructures were formed by the interaction between the laser-induced plume and the film surface.
9:45	10:00	SLPC7-4	Two-dimensional amorphous transitional metal oxides from laser ablation in liquids for photocatalytic hydrogen production	Z.Y. Lin, W.J. Li, G.W. Yang School of Materials Science & Engineering, Sun Yat-sen University, China	Two-dimensional amorphous transitional metal oxides from laser ablation in liquids for photocatalytic hydrogen production
10:00	10:30	Break

Start	End	Session No.	Title	Speaker	Description
10:30	12:00	SLPCp8-1	Investigate of the laser cladding process by blue diode laser	Ritsuko Higashino¹, Masahiro Tsukamoto¹, Yuji Sato¹, Nobuyuki Abe¹, Kohei Asano¹, Takahisa Shobu², Yoshinori Funada³ ¹Joining and Welding Research Institute, Osaka University, Japan, ²Japan Atomic Energy Agency, Japan, ³Industrial Research Institute of Ishikawa, Japan	In order to clarify the mechanism of copper layer formation, the layer formation process when forming a copper layer using a blue direct diode laser was observed using in situ X ray observation technique.
		SLPCp8-2	Pure copper layer formation on stainless steel plate with blue diode laser induced coating system	Takahiro Hara¹, Masahiro Tsukamoto², Kohei Asano¹, Yuji Sato², Ritsuko Higashino², Yoshinori Funada³, Nobuyuki Abe² ¹Graduate School of Engineering, Osaka University, Japan, ²Joining and Welding Research Institute, Osaka University, Japan, ³Industrial Research Institute of Ishikawa, Japan	The pure copper layer was formed on the stainless steel plate with blue direct diode laser induced coating system in order to clarify the coating mechanism.
		SLPCp8-3	Simple estimation method to calculate absorbed power distribution for selective laser melting	Tomomasa Ohkubo¹, Yuji Sato², Toshi-Taka Ikeshoji³, Ei-ichi Matsunaga¹, Masahiro Tsukamoto² ¹Department of Mechanical Engineering, Tokyo University of Technology, Japan, ²Joining and Welding Research Institute, Osaka University, Japan, ³Fundamental Technology for Next Generation Research Institute, Kindai University, Japan	We propose a simple estimation model to calculate absorbed power distribution including depth direction using ray-tracing. A surrounding box which has cyclic boundaries enable to reduce the calculation cost.
		SLPCp8-4	Selective laser melting of NdFeB magnetic powers	Chung-Yo Chen¹, Chung-Wei Cheng¹, Mi-Ching Tsai², Tsung-Wei Chang², Wen-Cheng Chang³, An-Chen Lee¹ ¹Department of Mechanical Engineering, National Chiao Tung University, Taiwan, ²Department of Mechanical Engineering, National Cheng Kung University, Taiwan, ³Department of Physics, National Chung Cheng University, Taiwan	This study utilized a self-developed multi-beams SLM system to fabricate NdFeB structures from Nd2Fe14B powders. The advantages are that the distance between the multi-beams, pulse duration, repetition rate, and scanning strategy can all be controlled.
		SLPCp8-5	Bead-on welding of copper film using 100W blue diode laser	Kento Morimoto¹, Masahiro Tsukamoto², Shin-ichiro Masuno², Yuji Sato², Kazuyuki Azumi¹, Yoshihiko Hayashi^{1, 2}, Nobuyuki Abe² ¹Osaka Fuji Corporation, Japan, ²Joining and Welding Research Institute , Osaka University, Japan	Bead-on welding for the pure copper film was carried out using a blue diode laser. The bead was formed on the pure copper film without pore and crack by using the blue diode laser.
		SLPCp8-6	Influence of intensity distribution on surface quality in high speed laser welding of aluminum alloy	Martin Ruthandi Maina¹, Yasuhiro Okamoto¹, Akira Okada¹, Matti Närhi², Jarno Kangastupa², Jorma Vihinen³ ¹Nontraditional Machining Laboratory, Okayama University, Japan, ²Corelase Oy, Finland, ³Laser Application Laboratory, Tampere University of Technology, Finland	Experimental and numerical investigations were performed in high speed laser welding of aluminium alloy. In order to achieve deep penetration with stable welding phenomena and ensure good surface quality, adjustable ring-mode fiber laser was used.
		SLPCp8-7	Experimental characterization of the interaction dynamics of cw-laser radiation with metal samples in the 105W/cm² regime	Dominic Heunoske, Sebastian Schäffer, Marcel Goesmann, Jens Osterholz, Mathias Wickert Laser technologies, Fraunhofer EMI, Germany	At Laser intensities above 105kW/cm² material evaporates and affects the energy transfer from laser to metal sample. A systematic experimental study was performed using high-speed cameras, time- and space- resolved emission spectroscopy and interferometry
		SLPCp8-8	Laser metal bumping with SUS316L molten powder jet by blue diode laser for steel / carbon fiber reinforced thermoplastics joint	Kiyokazu Yasuda¹, Yuki Uchida¹, Rennosuke Tamura¹, Takahiro Hara², Yuji Sato², Masahiro Tukamoto² ¹Division of Materials and Manufacturing Science, Osaka University, Japan, ²Joining and Welding Research Institute, Osaka University, Japan	Laser Metal Bumping (LMB) was conducted with multi-fiber focused blue LD lasers. The surface morphology on mild steels by LMB turned to be from bead-like to isolated bump type, effective for strengthening steel /CFRTP joints.
		SLPCp8-9	Effect of laser peening on aluminum alloy 7075	Ryotaro Oka¹, Shin Toyokura¹, Manabu Heya², Miho Tsuyama¹, Hitoshi Nakano¹ ¹Department of Electrical and Electronic Engineering, Faculty of Science and Technology, Kindai University, Japan, ²Department of Electronic Information and Communication Engineering, Faculty of Engineering, Osaka-Sangyo University, Japan	This study is to clarify various characteristics when laser peeening treatment is performed on aluminum alloy 7075 which is usually used for aircraft parts.
		SLPCp8-10	Control of plasma confinement layer for improving laser peening effect	Akihiro Hata¹, Naoya Ehara¹, Manabu Heya², Miho Tsuyama¹, Hitoshi Nakano¹ ¹Electrical and Electronic Engineering, Faculty of Science and Technology, Kindai University, Japan, ²Electronic information and Communication Engineering, Faculty of Engineering, Osaka-Sangyo University, Japan	Water which has high acoustic impedance and high laser transmittance is chosen as the plasma confinement layer. In this study, the water temperature is varied to improve the laser peening effect.
		SLPCp8-11	Effect of control of acoustic impedance in plasma confinement layer on laser peening	Miho Tsuyama¹, Naoya Ehara¹, Kazuma Yamashita¹, Manabu Heya², Hitoshi Nakano¹ ¹Faculty of Science and Engineering, Kindai University, Japan, ²Faculty of Engineering, Osaka-sangyo University, Japan	The present study aimed to control the plasma confinement layer on laser peening. The plasma confinement layer contributes to the increase in the shock wave pressure by suppressing the expansion of the laser-produced plasma.
		SLPCp8-14	Formation behavior of laser induced periodic surface structures in various media	Tomoki Kobayashi¹, Tomohiro Wakabayashi², Yuichi Takushima³, Jiwang Yan¹ ¹Mechanical Engineering, Keio University, Japan, ²Yazaki corporation, Japan, ³Optoquest, Japan	Laser-induced periodic surface structure (LIPSS) was formed on the stainless tool steel by irradiating a picosecond pulsed laser in various types of media. Different surface morphologies were observed on the material surface, depending on the types of media.
		SLPCp8-15	Analytical approach to hydrophobic properties of micro patterns carbonized by 355nm UV laser	Gyeongju Je¹, Bosung Shin^{1, 2}, Hyesu Kim¹, Junhan Park¹ ¹Cogno‑Mechatronics Engineering, Pusan National University, Korea of republic, ²Optics & Mechatronics Engineering, Pusan National University, Korea of republic	Carbonized patterning using 355nm UV laser was conducted to impart hydrophobicity on polyimide film and analyzed contact angle according to the properties of patterns.
		SLPCp8-16	Femtosecond laser coloration with nanoparticles formed on titanium plate	Shogo Nishino^{1, 2}, Masaki Hashida^{1, 2}, Hitoshi Sakagami³, Yuki Furukawa^{1, 2}, Sadaoki Kojima², Shunsuke Inoue^{1, 2}, Shuji Sakabe^{1, 2} ¹Graduate School of Science, Kyoto University, Japan, ²Advanced Research Center for Beam Science, Institute for Chemical Research, Kyoto University, Japan, ³National Institute for Fusion Science, Japan	Coloration on titanium surface by femtosecond laser pluses is demonstrated and the correlation of color and formed nanoparticles on the surface is discussed. It has been found that color depends on particle size distribution.
		SLPCp8-17	Volumetric graphics of microbubbles in gold nanoparticle-dispersed glycerin using femtosecond laser pulses	Taisei Chiba, Kota Kumagai, Yoshio Hayasaki Center for Optical Research and Education (CORE), Utsunomiya University, Japan	We have demonstrated the generation of femtosecond laser-induced microbubbles in glycerin containing gold nanoparticles. Gold nanoparticles reduced the energy for the generation of microbubbles and the expansion of the generation region in the axial direction.
		SLPCp8-18	Micro and nano structured membranes for the use in AlGaN/GaN- MEMS and pressure sensors, microfluidic applications and bioengineering	Johann Karl Zehetner¹, Stephan Kasemann¹, Gabriel Vanko², Jaroslav Dzuba², Tibor Lalinsky², Sylvia Nürnberger³ ¹Research Centre for Microtechnology, University of Applied Sciences, Austria, ²Institute of Electrical Engineering, Slovak Academy of Sciences, Slovak Republic, ³Department of Trauma Surgery, Medical University of Vienna, Austria	By polarization determined femtosecond laser ablation combined with reactive ion etching we fabricated membranes in Si and SiC for pressure sensors and 300µm long needles on top of 10µm thick membranes for biomimetic microfluidic systems
		SLPCp8-20	Three-dimensional Cu-based microfabrication using femtosecond laser induced internal writing	Mizue Mizoshiri, Yukinari Kondo, Seiichi Hata Graduate School of Engineering, Nagoya University, Japan	Three-dimensional Cu-based microstructures were fabricated using femtosecond laser induced internal writing. Localized plasmon enhancement and heat accumulation were selectively used to sinter single and multi-layers of Cu2O NSs.
		SLPCp8-22	Ablation by double pulse irradiation by femtosecond laser with different delay time	Masahito Katto¹, Kensuke Nakajima², Sho Kuronita², Masahiro Tsukamoto³, Masanori Kaku², Atsushi Yokotani² ¹CRCC, University of Miyazaki, Japan, ²Faculty of Engineering, University of Miyazaki, Japan, ³JWRI, Osaka University, Japan	We examined the ablation traces on the Si surface irradiated by the double pulses of fs-laser. In the near threshold range, energy deposition by 1st pulse was affected the 2nd pulse until the 250 ps. Above the threshold the HAZ did not grown after the time interval of 50 ns. These results were explained by the energy transfer from electrons to lattice and thermal diffusion.
		SLPCp8-23	Holographic laser processing using femtosecond second harmonic generation	Ryo Onoda, Satoshi Hasegawa, Yoshio Hayasaki Center for Optical Research and Education (CORE), Utsunomiya University, Japan	In order to perform efficient fabrication of diffractive optical elements based on refractive index modification inside a transparent material, holographic laser processing using femtosecond second-order harmonic generation was demonstrated.
		SLPCp8-24	Holographic complex-amplitude modulation for generating sub-diffraction-limit spot applied to laser material processing	Satoshi Hasegawa¹, Cao Hoai Vu¹, Yusuke Ogura², Jun Tanida², Yoshio Hayasaki¹ ¹Center for Optical Research and Education (CORE), Utsunomiya University, Japan, ²Graduate School of Information Science and Technology, Osaka University, Japan	We demonstrated the holographic complex-amplitude modulation for generating the sub-diffraction-limit spot applied to laser processing. The modulation is based on the regulation of the intensity and phase between the center and surrounding beams. In the presentation, a result of femtosecond laser processing using the sub-diffraction-limit spot will also be discussed.
		SLPCp8-25	Direct-writing properties of Cu-Ni-based thermoelectric micropatterns formed by femtosecond laser reductive sintering at low writing speed	Kenta Nishitani, Seiichi Hata, Junpei Sakurai, Mizue Mizoshiri Department of micro-nano mechanical science and engineering, Graduate School of Engineering, Nagoya University, Japan	P-type Cu-Ni and n-type Cu2O thermoelectric micropatterns were selectively fabricated by femtosecond laser reductive sintering of CuO/NiO mixed nanoparticles. These micropatterns were formed at low writing speed without damage created by stage acceleration.
		SLPCp8-26	The study of multi-angle drilling by Nd: YAG nanosecond laser on 27G needle and electrochemical polishing	Hsin Hao Su¹, Wei Te Wu¹, Chien Hsing Chen², Jian Neng Wang³ ¹Department of Biomechatronics Engineering, National Pingtung University of Science and Technology, Taiwan, ²Department of Physics, National Chung Cheng University, Taiwan, ³Department of Civil and Construction Engineering, National Yunlin University of Science and Technology, Taiwan	In this study, a series of multi-angle holes were drilled in the 27G dental irrigation needle. We used a nano-second pulsed laser source. Therefore, we used electrochemical polishing technology to improve the HAZ situation.
		SLPCp8-27	Characterization a poly-silicon thin film formed by the laser annealing with a high-power blue laser diode	Young-Hwan Choi, Hyun Yeol Ryu, Han-Youl Ryu Physics, Inha University, Korea	We report on the crystallization of a-Si thin film by the annealing with a high-power blue laser diode, and the crystallinity of the annealed poly-Si was characterized by XRD, ellipsometry, and Raman measurements.
		SLPCp8-28	Piercing of PTFE sheet by short pulse CO2 laser	Hayato Goto¹, Yuta Ishikawa¹, Kazuyuki Uno¹, Takahisa Jitsuno² ¹University of Yamanashi, Japan, ²Institute of Laser Engineering, Osaka University, Japan	We pierced PTFE by a short pulse CO2 laser. The short laser pulse with the pulse tail with the fluence of about 7.5 J/cm2 produced a through hole.
		SLPCp8-29	Characterization of two-photon laser exposure patterns in photoresist via photoluminescence quenching	Edy Yulianto, Subhashri Chatterjee, Vygantas Mizeikis Research Institute of Electronics, Shizuoka University, Japan	We report on imaging of latent 3D photo exposure patterns in photoresist exposed via two-photon absorption prior to their development. This technique can be used to reveal useful features of photo exposure, such as spatial distribution, laser modification threshold etc.
		SLPCp8-30	Post-fabrication spectral tuning of perfect-absorber metasurface structures fabricated by direct laser write technique	Subhashri Chatterjee¹, Edy Yulianto¹, Ihar Faniayeu^{1, 2}, Vygantas Mizeikis¹ ¹Research Institute of Electronics, Shizuoka University, Japan, ²Department of General Physics, Gomel State University, Belarus	We investigate posibilites to tune resonance wavelength of perfect absorber structures fabricated by Direct Laser Write (DLW) technique by varying thickness of the metallic film deposited conformally on the structures.
		SLPCp8-32	Laser micro incising to wood surface – Perforations enable penetration of chemicals for wood modification –	Satoshi Fukuta¹, Masaki Nomura¹, Koji Wakabayashi² ¹Industrial Research Center, Aichi Center for Industry and Science Technology, Japan, ²Laser Technical Center, Laserx Co., Ltd., Japan	We proposed “Laser Micro Incising” for wood, a new technique applying short pulse laser. The perforations on wood surface processed by the laser enabled permeation of chemicals, and chemical modification of wood could be performed.
		SLPCp8-33	Measurement and analysis of material properties using laser induced breakdown spectroscopy	Sangwoo Yoon, Jihoon Kim, Joohan Kim Department of Mechanical Engineering, Seoul National University of Science and Technology, Korea	LIBS is generally used to measure elemental distribution, but the plasma signal from the ablation of the material has a lot of information about the material and can analyze spectroscopic signals to confirm the various properties of the specimen.
12:00	13:30	Lunch

Start	End	Session No.	Title	Speaker	Description
13:30	14:00	SLPC9-1Invited	Sensors in laser materials processing: Are they finally ready to take the lead?	Ruediger Moser¹, Matthias Strebel¹, Tobias Beck², Stephan André², Martin Schoenleber², Markus Kogel-Hollacher¹ ¹R&D, Precitec GmbH & Co. KG, Gaggenau, Germany, ²R&D, Precitec Optronik GmbH, Neu-Isenburg, Germany	This contribution to the SLPC conference will report on industrial solutions for laser processing implemented in a production line which support the Industry 4.0 aspects of flexible manufacturing, condition monitoring and smart maintenance to reduce machine downtime and facilitate self optimisation.
14:00	14:15	SLPC9-2	High-quality high-speed welding of aluminum with 16 kW average laser power	Christian Hagenlocher, Florian Fetzer, Rudolf Weber, Thomas Graf Institut fuer Strahlwerkzeuge, University of Stuttgart, Germany	High laser powers enable welding of aluminum alloys with very high feed rates. X-ray videos show a constant capillary without any fluctuations. The resulting weld is free of pores and shows a constant penetration depth.
14:15	14:30	SLPC9-3	High power fiber laser welding of aerospace alloys with filler wire	Mohammed Naeem Engineering/ Application, Prima Power Laserdyne, USA	Work has been carried at Prima Power Laserdyne to develop laser and processing parameters to produce welds with nickel and titanium aerospace alloys to produce good quality welds that meet the stringent requirements of the aerospace industry.
14:30	14:45	SLPC9-4	Latest laser welding technology – Potentials for difficult to weld steel grades	Matthias Beranek TRUMPF Laser- und Systemtechnik GmbH, Germany	With ‘Modulated Laserwelding’ TRUMPF is introducing a novel solid state laser technology to solve the problems and challenges in laserwelding of high strength steel grades opening up a whole new set of possibilities for parts designs and usecases.
14:45	15:00	SLPC9-5	High aspect ratio laser cutting of CFRP using nanosecond UV laser pulses	Masahiro Moriyama^{1, 7}, Akira Mizutani², Shuntaro Tani⁴, Ryosuke Nakamura², Atsushi Kosuge⁴, Isao Ito⁴, Zhigang Zhao⁴, Takashi Hira¹, Yohei Kobayashi^{4, 6}, Hiroharu Tamaru^{1, 6}, Norikatsu Mio^{3, 6}, Makoto Kuwata-Gonokami⁵, Junji Yumoto^{1, 6} ¹Institute for Photon Science and Technology, The University of Tokyo, Japan, ²Department of Applied Physics, The University of Tokyo, Japan, ³Photon Science Center, The University of Tokyo, Japan, ⁴Institute for Solid State Physics, The University of Tokyo, Japan, ⁵Department of Physics, The University of Tokyo, Japan, ⁶Research Institute for Photon Science and Laser Technology, The University of Tokyo, Japan, ⁷Toray Industries, Inc., Japan	Laser processing of CFRPs for aircraft using nanosecond UV laser pulses was studied. As a result of this study, high aspect ratio laser cutting of more than 80 on CFRPs was achieved.
15:00	15:30	Break

Start	End	Session No.	Title	Speaker	Description
15:30	16:00	SLPC10-1Invited	High power blue lasers development for copper material processing	Jean-Michel Pelaprat, Matthew Finuf, Robert Fritz, Mark Zediker NUBURU Inc, USA	We will report the recent development of high power blue laser, their performance and their advantages for material processing. We will further report recent application results of metal processing and in particular the bead on plate test results with a 150 Watt and a 500Watts Continuous Wave blue laser, for welding copper foils up to 1mm thick and dissimilar metals lap welding up to 250 µm.
16:00	16:30	SLPC10-2Invited	High brightness blue direct diode laser for advanced materials processing	K. Tojo¹, N. Wakabayashi¹, M. Yamada¹, S. Uno¹, N. Ishigaki¹, T Hiroki¹, J. Saikawa¹, S. Masuno², K. Asano³, K. Asuka⁴, N. Abe², M. Tsukamoto² ¹Device Dept., Shimadzu Corporation, Japan, ²Joining and Welding Research Institute, Osaka University, Japan, ³Yamazaki Mazak Corporation, Japan, ⁴Nichia Corporation, Japan	High-power, high-brightness fiber-coupled Blue Direct Diode Laser using new beam multiplexing technique to achieve 450-nm power intensity of 1.2MW/cm2 on the fiber facet for practical use of several kind of material processing will be presented.
16:30	16:45	SLPC10-3	Laser cladding of pure copper with blue and IR laser	Kohei Asano^{1, 6}, Masahiro Tsukamoto², Yuji Sato², Ritsuko Higashino², Yoshihisa Sechi³, Takahiro Hara⁴, Masanori Sengoku⁵, Minoru Yoshida⁵ ¹Graduate School of Engineering, Osaka University, Japan, ²Joining and Welding Research Institute, Osaka University, Japan, ³ProductionTechnology Division, Kagoshima Prefectural Institute of Industrial Technology, Japan, ⁴School of Engineering, Osaka University, Japan, ⁵Graduate School of Science and Engineering, Kindai University, Japan, ⁶Yamazaki Mazak Corp., Japan	Laser cladding of pure copper was conducted by the laser cladding system with blue laser and that with IR laser on type 304 stainless steel plates. We investigated pure copper layers produced by both systems and indicated primacy of blue laser over IR laser.
16:45			SLPC 2018 Award Ceremony and Closing Remark