ICALEO 2011 Paper #1002 (Recoil Pressure and Surface Temperature in Laser Drilling)

Recoil Pressure and Surface Temperature in Laser Drilling
Authors:
Matthieu Schneider, Arts et Métiers Paristech; Paris France
Jérémie Girardot, Arts et MéTiers Paristech; Paris France
Laurent Berthe, Arts et Métiers Paristech; -
Presented at ICALEO 2011

To drill sub-millimeters holes one of the way is laser drilling. Laser drilling is a well-established industrial process from decades; however several fundamental questions are still unsolved about the physical understanding of the laser matter interaction. A sequential description of the laser drilling process can be made as following. The irradiated surface is heated by absorption of laser energy. Once the surf...

ICALEO 2011 Paper #1001 (Drilling with Fiber Lasers)

Drilling with Fiber Lasers
Authors:
Jens Dietrich, Lehrstuhl fuer Lasertechnik; 52074 Aachen Germany
Christoph Blaesius, Lehrstuhl fuer Lasertechnik; 52074 Aachen Germany
Stefan Brief, Lehrstuhl fuer Lasertechnik; 52074 Aachen Germany
Ingomar Kelbassa, Lehrstuhl fuer Lasertechnik; 52074 Aachen Germany
Presented at ICALEO 2011

For drilling holes such as cooling holes in turbine blades with diameters from 100 µm up to 1.5 mm flash lamp pumped laser sources e.g. slab lasers are commonly used. These laser sources have peak powers of several kW at pulse durations from microseconds up to milliseconds with a high beam quality. Due to the beam quality, small spot...

ICALEO 2010 Paper #P200 (Hydrodynamic Behavior Induce Laser Drilling on Steel Aluminum Carbone and Zirconia)

Hydrodynamic Behavior Induce Laser Drilling on Steel Aluminum Carbone and Zirconia
Authors:
Matthieu Schneider, Laboratoire PIMM Procédé et Ingénierie en Mécanique et Matériaux CNRS/ Arts et Métiers Paristech UMR8006; Paris France
Laurent Berthe, Laboratoire PIMM Procédé et Ingénierie en Mécanique et Matériaux CNRS/ Arts et Métiers Paristech UMR8006; Paris France
Presented at ICALEO 2010

Laser drilling is commonly used by industrials to drill hole in a wide super-alloys. These materials have high thermal and mechanical properties that make them difficult to machine. Moreover they are coated by a ceramic which have high hardness, chemical inertness and low thermal conduc...

ICALEO 2010 Paper #P199 (Laser Parallel Micro/Nano Patterning of Hydrophobic Surfaces in Optical Near Fields)

Laser Parallel Micro/Nano Patterning of Hydrophobic Surfaces in Optical Near Fields
Authors:
Ashfaq Khan, Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester; Manchester Great Britain
Zengbo Wang, Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester; Manchester Great Britain
Mohammad A Sheikh, Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester; Manchester Great Britain
David J Whitehead, Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The ...

ICALEO 2010 Paper #P197 (Evaluation of Optical Sensors for Laser Welding in a Technical Cognitive Environment)

Evaluation of Optical Sensors for Laser Welding in a Technical Cognitive Environment
Authors:
Lukas Lohaus, Lehrstuhl für Photonik und Terahertztechnologie, Ruhr-Universität Bochum; - USA
Thibault Bautze, Institute of Date Processing and CoTeSys, Technische Universität Műnchen; Munich Germany
Presented at ICALEO 2010

Focal spot positioning and robot path control require online measurement of the distance between a welding head and the workpiece to be processed. For autonomously working applications, such as cognitive focal shift control, distance measurements can be used to teach coaxial video images at different distances. This paper compares optical sensors based on laser tri...

ICALEO 2010 Paper #P193 (Laser Surface Alloying of Mn-Ni-Al Bronze for Cavitation Erosion Resistance)

Laser Surface Alloying of Mn-Ni-Al Bronze for Cavitation Erosion Resistance
Authors:
Chi Tat Kwok, University of Macau; Macau Peoples Republic of China
Poo Kee Wong, University of Macau; Macau Peoples Republic of China
Fai Tsun Cheng, The Hong Kong Polytechnic University; Hong Kong Peoples Republic of China
Hau Chung Man, The Hong Kong Polytechnic University; Hong Kong Peoples Republic of China
Weng Kin Chan, University of Macau; Macau Peoples Republic of China
Presented at ICALEO 2010

Cavitation erosion of a metal surface is caused by the repeated nucleation, growth and collapse of cavities in vibratory and high-speed flowing liquid. It occur...

ICALEO 2010 Paper #P191 (Thermal Lensing Compensation Objective for High Power Lasers)

Thermal Lensing Compensation Objective for High Power Lasers
Authors:
Michael Scaggs, Neoteric Concepts, LLC; Weston FL USA
Gil Haas, Haas Laser Technologis, Inc.; Flanders NJ USA
Presented at ICALEO 2010

Athermalization of focusing objectives is a common technique for optimizing imaging systems in the infrared where thermal effects are a major concern. The athermalization is generally done within the spectrum of interest and not generally applied to a single wavelength. By applying athermalization techniques to a laser system, a significant reduction in thermal lensing of the laser system can be realized. We describe a passive method minimizing thermal lensing of high power lasers.

ICALEO 2010 Paper #P189 (Laser Micro Processing using a High Repetition Rate Femto Second Laser)

Laser Micro Processing using a High Repetition Rate Femto Second Laser
Authors:
J. Schille, University of Applied Sciences Mittweida, Laser Application Centre, The University of Manchester, The Photon Sciences Institute & CEAS; Mittweida Germany
U. Loeschner, University of Applied Sciences Mittweida, Laser Application Centre; Mittweida Germany
R. Ebert, University of Applied Sciences Mittweida, Laser Application Centre; Mittweida Germany
P. Scully, The University of Manchester, The Photon Sciences Institute & CEAS; Manchester
N. Goddard, The University of Manchester, The Photon Sciences Institute & CEAS; Manchester
H. Exner, University of Applied...

ICALEO 2010 Paper #P187 (Variation of Topography on the Ti-Based Bulk Metallic Glass After Femtosecond Laser Irradiation)

Variation of Topography on the Ti-Based Bulk Metallic Glass After Femtosecond Laser Irradiation
Authors:
Togo Shinonaga, Graduate School of Engineering, Osaka University; Suita, Osaka Japan
Masahiro Tsukamoto, Joining and Welding Research Institute, Osaka University; Ibaraki, Osaka Japan
Daisuke Tone, Graduate School of Engineering, Osaka University; Suita, Osaka Japan
Sayaka Maruyama, Graduate School of Science and Engineering, Tokyo Institute of Technology; Yokohama, Kanagawa Japan
Nobuhiro Matsushita, Materials and Structures Laboratory, Tokyo Institute of Technology; Yokohama, Kanagawa Japan
Takeshi Wada, Institute for Materials Research, Tohok...

ICALEO 2010 Paper #P181 (Application of Air Pomp in the Laser Drilling Due to Solve Mud Circulation Problem in Oil Wells Drilling Industry)

Application of Air Pomp in the Laser Drilling Due to Solve Mud Circulation Problem in Oil Wells Drilling Industry
Authors:
Mahdi Bakhtbidar, Islamic Azd University, Omidieh Branch, Young Research Center; -
Mohsen Ghorbankhani, Islamic Azad University, Omidieh Branch; Tekab
Siyamak Moradi, Islamic Azad University, Mahshahr Branch; Tehran
Presented at ICALEO 2010

Application

Although studying widespread about laser drilling in the world but, so far lasers doesn't have been operative in oil and gas wells drilling industry because there were several problems. Also, need for bring a new method for oil and gas wells drilling is necessary. Drilling with laser technology...