Dr. Helen Howard Profile

Dr. Helen Howard

at Natl Univ of Ireland

SPIE Involvement:

Author

Publications (5)

Proceedings Article | 9 December 2004 Paper

Analysis of entrapped debris during femtosecond machining of metals

Paul Mannion, Edward Coyne, Gerard O'Connor, Helen Howard, Thomas Glynn

Proceedings Volume 5578, (2004) https://doi.org/10.1117/12.569284

KEYWORDS: Laser ablation, Pulsed laser operation, Particles, Metals, Laser damage threshold, Femtosecond phenomena, Spherical lenses, Laser processing, Scanning electron microscopy, Ions

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Proceedings Article | 20 September 2004 Paper

The onset of phase explosion and the role of damage accumulation in ultrafast laser processing of common metals in air

Paul Mannion, Gerard O'Connor, Edward Coyne, Helen Howard, Thomas Glynn

Proceedings Volume 5448, (2004) https://doi.org/10.1117/12.547043

KEYWORDS: Laser ablation, Metals, Laser damage threshold, Electrons, Scanning electron microscopy, Particles, Copper, Diffusion, Transition metals, Explosives

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Proceedings Article | 15 July 2004 Paper

Analysis of debris generated during UV laser micro-machining of silicon

Gerard O'Connor, Helen Howard, Alan Conneely, Thomas Glynn

Proceedings Volume 5339, (2004) https://doi.org/10.1117/12.529248

KEYWORDS: Silicon, Semiconducting wafers, Semiconductor lasers, Pulsed laser operation, Micromachining, Plasma, Ultraviolet radiation, Laser processing, Laser ablation, Scanning electron microscopy

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Proceedings Article | 15 July 2004 Paper

Nanosecond laser silicon micromachining

Jun Ren, Sergei Orlov, Lambertus Hesselink, Helen Howard, Alan Conneely

Proceedings Volume 5339, (2004) https://doi.org/10.1117/12.529442

KEYWORDS: Laser ablation, Plasma, Pulsed laser operation, Silicon, Semiconductor lasers, Laser energy, Estimation theory, Liquids, Micromachining, Ultraviolet radiation

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Proceedings Article | 27 August 2003 Paper

Investigation of a method for the determination of the focused spot size of industrial laser beams based on the drilling of holes in Mylar film

Helen Howard, Alan Conneely, Gerard O'Connor, Thomas Glynn

Proceedings Volume 4876, (2003) https://doi.org/10.1117/12.463732

KEYWORDS: Beam expanders, Femtosecond phenomena, Pulsed laser operation, Nd:YAG lasers, Laser drilling, Diode pumped solid state lasers, Ultraviolet radiation, Signal attenuation, Q switched lasers, Q switching

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