Dr. Etsuji Ohmura Profile

Dr. Etsuji Ohmura

Professor at Osaka Univ

SPIE Involvement:

Author

Publications (23)

Proceedings Article | 4 March 2016 Paper

Paper

Heat transfer analysis of two wavelengths laser microprocessing inside glass

Aoi Matsumoto, Takayuki Tamaki, Shinichi Enoki, Keisuke Yahata, Etsuji Ohmura

Proceedings Volume 9736, 97361I (2016) https://doi.org/10.1117/12.2211287

KEYWORDS: Glasses, Finite element methods, Laser processing, Optical simulations, Laser glasses, Laser systems engineering, Laser development, Analytical research, Carbon dioxide lasers, Femtosecond phenomena, Luminescence, High speed cameras, Laser marking, Absorption, Camera shutters, Reflectivity

Read Abstract +

Proceedings Article | 28 February 2011 Paper

Paper

Analysis of internal crack propagation in silicon due to permeable pulse laser irradiation: study on processing mechanism of stealth dicing

Etsuji Ohmura, Yuta Kawahito, Kenshi Fukumitsu, Junji Okuma, Hideki Morita

Proceedings Volume 7996, 799603 (2011) https://doi.org/10.1117/12.887431

KEYWORDS: Wave propagation, Semiconducting wafers, Stress analysis, Silicon, Semiconductor lasers, Pulsed laser operation, Mechanics, Laser processing, Laser scanners, Laser irradiation

Read Abstract +

Proceedings Article | 8 October 2004 Paper

Paper

Fabrication of microspike-arrays on tungsten surface using femtosecond laser

Tomokazu Sano, Masato Yanai, Etsuji Ohmura, Yasumitsu Nomura, Isamu Miyamoto, Akio Hirose, Kojiro Kobayashi

Proceedings Volume 5662, (2004) https://doi.org/10.1117/12.596777

KEYWORDS: Tungsten, Femtosecond phenomena, Silicon, Field emission displays, Laser ablation, Semiconductor lasers, Diffraction, Carbon dioxide lasers, Metals, Nd:YAG lasers

Read Abstract +

Proceedings Article | 8 October 2004 Paper

Paper

Femtosecond-laser-driven shock quenching of the high-pressure phase of iron

Tomokazu Sano, Hiroaki Mori, Osami Sakata, Etsuji Ohmura, Isamu Miyamoto, Akio Hirose, Kojiro Kobayashi

Proceedings Volume 5662, (2004) https://doi.org/10.1117/12.596583

KEYWORDS: Iron, Femtosecond phenomena, Diffraction, Crystals, Thermodynamics, Backscatter, Synchrotrons, X-ray diffraction, Metals, Transmission electron microscopy

Read Abstract +

Proceedings Article | 1 September 2004 Paper

Paper

Distortion analysis of beam profile and pulse shape of second harmonic due to repetitive irradiation of picosecond pulses

Etsuji Ohmura, Kazufumi Nomura, Isamu Miyamoto

Proceedings Volume 5456, (2004) https://doi.org/10.1117/12.554284

KEYWORDS: Picosecond phenomena, Gaussian pulse, Rectangular pulse, Crystals, Ferroelectric materials, Nonlinear crystals, Laser crystals, Second-harmonic generation, Distortion, Gaussian beams

Read Abstract +

Proceedings Article | 18 November 2003 Paper

Paper

Theoretical analysis of second harmonic characteristics generated by KTiOPO4 crystal

Kazufumi Nomura, Etsuji Ohmura, Alexander Horn, Isamu Miyamoto

Proceedings Volume 5063, (2003) https://doi.org/10.1117/12.540755

KEYWORDS: Crystals, Temperature metrology, Refractive index, Laser crystals, Nonlinear crystals, Second-harmonic generation, Absorption, Ferroelectric materials, Frequency conversion, Phase matching

Read Abstract +

Proceedings Article | 18 November 2003 Paper

Paper

Influence of temporal pulse shape on second harmonic generation

Etsuji Ohmura, Kazufumi Nomura, Isamu Miyamoto

Proceedings Volume 5063, (2003) https://doi.org/10.1117/12.540933

KEYWORDS: Gaussian pulse, Rectangular pulse, Crystals, Picosecond phenomena, Nonlinear crystals, Second-harmonic generation, Laser crystals, Harmonic generation, Absorption, Gaussian beams

Read Abstract +

Proceedings Article | 18 November 2003 Paper

Paper

Preparation of channel waveguides with extremely thermally stabilized laser-induced gratings

Hiroaki Nishiyama, Tomokazu Sano, Etsuji Ohmura, Isamu Miyamoto, Shin-ichi Matsumoto, Mitsunori Saito, Kenji Kintaka, Junji Nishii

Proceedings Volume 5063, (2003) https://doi.org/10.1117/12.540896

KEYWORDS: Diffraction gratings, Annealing, Diffraction, Waveguides, Channel waveguides, Laser stabilization, Glasses, Heat treatments, Refractive index, Optical filters

Read Abstract +

Proceedings Article | 17 October 2003 Paper

Paper

Femtosecond pulsed laser induced phase transition in iron

Tomokazu Sano, Hiroaki Mori, Etsuji Ohmura, Isamu Miyamoto

Proceedings Volume 4977, (2003) https://doi.org/10.1117/12.479232

KEYWORDS: Iron, Femtosecond phenomena, Crystals, Pulsed laser operation, Laser crystals, Metals, Polishing, Backscatter, Diffraction, Mirrors

Read Abstract +

Proceedings Article | 17 October 2003 Paper

Paper

Excimer and femtosecond pulsed laser induced forward transfer process of metal thin film

Hirokazu Yamada, Tomokazu Sano, Etsuji Ohmura, Isamu Miyamoto

Proceedings Volume 4977, (2003) https://doi.org/10.1117/12.479249

KEYWORDS: Thin films, Excimer lasers, Femtosecond phenomena, Pulsed laser operation, Particles, Nickel, Metals, Excimers, Helium neon lasers, Laser irradiation

Read Abstract +

Proceedings Article | 19 February 2003 Paper

Paper

Microwelding of ultrathin metal foil using Yb-fiber laser

Seo-jeong Park, Etsuji Ohmura, Isamu Miyamoto

Proceedings Volume 4830, (2003) https://doi.org/10.1117/12.499620

KEYWORDS: Laser welding, Metals, Fiber lasers, Gas lasers, Ytterbium, Photography, Thermal modeling, Sensors, Laser cutting, Laser development

Read Abstract +

Proceedings Article | 19 February 2003 Paper

Paper

Influence of laser absorption by nonlinear optical crystal on SHG efficiency

Etsuji Ohmura, Kazufumi Nomura, Isamu Miyamoto

Proceedings Volume 4830, (2003) https://doi.org/10.1117/12.486595

KEYWORDS: Crystals, Second-harmonic generation, Laser crystals, Absorption, Nonlinear crystals, Refractive index, Pulsed laser operation, Nd:YAG lasers, Laser irradiation, Temperature metrology

Read Abstract +

Proceedings Article | 19 February 2003 Paper

Paper

Molecular dynamics analysis of picosecond pulse laser ablation

Etsuji Ohmura, Ichirou Fukumoto, Isamu Miyamoto

Proceedings Volume 4830, (2003) https://doi.org/10.1117/12.501914

KEYWORDS: Chemical species, Laser ablation, Picosecond phenomena, Explosives, Laser energy, Molecular lasers, Laser processing, Aluminum, Electrons, Metals

Read Abstract +

Proceedings Article | 19 February 2003 Paper

Paper

Theoretical analysis of SHG conversion efficiency of nonlinear optical crystal with Gaussian beam irradiation

Kazufumi Nomura, Etsuji Ohmura, Isamu Miyamoto

Proceedings Volume 4830, (2003) https://doi.org/10.1117/12.486593

KEYWORDS: Crystals, Gaussian beams, Laser crystals, Nonlinear crystals, Second-harmonic generation, Absorption, Pulsed laser operation, Chlorine, Refractive index, Picosecond phenomena

Read Abstract +

Proceedings Article | 19 February 2003 Paper

Paper

Femtosecond laser ablation of Cr-SiO2 binary mask

Tomohiro Okamoto, Yukio Morishige, Etsuji Ohmura, Tomokazu Sano, Isamu Miyamoto

Proceedings Volume 4830, (2003) https://doi.org/10.1117/12.486596

KEYWORDS: Femtosecond phenomena, Laser ablation, Chromium, Microfabrication, Quartz, Pulsed laser operation, Photomasks, Binary data, Diffraction, Diffusion

Read Abstract +

Proceedings Article | 19 February 2003 Paper

Paper

Electron emission at an early stage of femtosecond pulsed laser ablation

Makoto Murai, Tomokazu Sano, Etsuji Ohmura, Isamu Miyamoto

Proceedings Volume 4830, (2003) https://doi.org/10.1117/12.486598

KEYWORDS: Laser ablation, Signal detection, Atmospheric particles, Pulsed laser operation, Metals, Copper, Laser irradiation, Particles, Femtosecond phenomena, Laser systems engineering

Read Abstract +

Proceedings Article | 19 February 2003 Paper

Paper

Analysis on resin removal in laser drilling of printed circuit board

Satoru Noguchi, Etsuji Ohmura, Isamu Miyamoto

Proceedings Volume 4830, (2003) https://doi.org/10.1117/12.499621

KEYWORDS: Finite element methods, Laser drilling, Absorption, Astatine, Pulsed laser operation, Epoxies, Copper, Interfaces, Picosecond phenomena, Metals

Read Abstract +

Proceedings Article | 25 February 2002 Paper

Paper

Scattering of evaporation particles in ultrashort-pulse laser ablation

Etsuji Ohmura, Ichirou Fukumoto, Isamu Miyamoto

Proceedings Volume 4426, (2002) https://doi.org/10.1117/12.456813

KEYWORDS: Particles, Laser ablation, Picosecond phenomena, Scattering, Chemical species, Laser scattering, Aluminum, Molecular lasers, Statistical analysis, Gaussian beams

Read Abstract +

Proceedings Article | 25 February 2002 Paper

Paper

Temperature dependence of SHG conversion efficiency of nonlinear optical crystal

Etsuji Ohmura, Tatsuya Taniguchi, Isamu Miyamoto

Proceedings Volume 4426, (2002) https://doi.org/10.1117/12.456814

KEYWORDS: Crystals, Nonlinear crystals, Laser crystals, Refractive index, Nd:YAG lasers, Absorption, Second-harmonic generation, Pulsed laser operation, Nonlinear optics, Crystallography

Read Abstract +

Proceedings Article | 6 November 2000 Paper

Paper

Thermohydrodynamics analysis on the mechanism of bump formation in laser texturing

Etsuji Ohmura, Rina Murayama, Isamu Miyamoto

Proceedings Volume 4088, (2000) https://doi.org/10.1117/12.405751

KEYWORDS: Laser irradiation, Metals, Liquids, Interfaces, Aluminum, Laser applications, Mathematical modeling, Transition metals, Atomic force microscopy, Human-machine interfaces

Read Abstract +

Proceedings Article | 6 November 2000 Paper

Paper

Molecular dynamics simulation of ablation process with ultrashort-pulsed laser

Etsuji Ohmura, Ichirou Fukumoto, Isamu Miyamoto

Proceedings Volume 4088, (2000) https://doi.org/10.1117/12.405692

KEYWORDS: Picosecond phenomena, Particles, Laser ablation, Chemical species, Optical simulations, Aluminum, Pulsed laser operation, Molecular lasers, Laser irradiation, Metals

Read Abstract +

Proceedings Article | 6 November 2000 Paper

Paper

Molecular dynamics analysis on physical phenomena of metal with evaporation induced by laser irradiation

Ichirou Fukumoto, Etsuji Ohmura, Alexei Zhidkov, Akira Sasaki, Takayuki Utsumi, Isamu Miyamoto

Proceedings Volume 4088, (2000) https://doi.org/10.1117/12.405740

KEYWORDS: Picosecond phenomena, Wave propagation, Aluminum, Chemical species, Metals, Laser ablation, Laser irradiation, Molecular lasers, Pulsed laser operation, Microfabrication

Read Abstract +

Proceedings Article | 7 June 2000 Paper

Paper

Analysis of laser ablation process in semiconductor due to ultrashort-pulsed laser with molecular dynamics simulation

Koji Watanabe, Yuri Ishizaka, Etsuji Ohmura, Isamu Miyamoto

Proceedings Volume 3933, (2000) https://doi.org/10.1117/12.387594

KEYWORDS: Silicon, Chemical species, Picosecond phenomena, Pulsed laser operation, Absorption, Semiconductor lasers, Laser ablation, Optical simulations, Molecular lasers, Wave propagation

Read Abstract +

Showing 5 of 23 publications

SIGN IN TO:

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Advertisement

Advertisement