Topographic imaging and velocity measurements of surface expansion during laser ablation of a metal layer on glass
Identifieur interne : 008113 ( Main/Repository ); précédent : 008112; suivant : 008114Topographic imaging and velocity measurements of surface expansion during laser ablation of a metal layer on glass
Auteurs : RBID : Pascal:06-0504436Descripteurs français
- Pascal (Inist)
- Front onde, Laser fibre, Mesure vitesse, Méthode mesure, Méthode ablation laser, Faisceau laser, Grande vitesse, Morphologie surface, Domaine temps ns, Résolution temporelle, Domaine temps ps, Fibre optique, Fibre monomode, Composé ternaire, Grenat aluminium yttrium, Gallium arséniure, Indium arséniure, Verre, Titane, Vélocimètre, Laser puissance, YAG, Y3Al5O12, Silice fusionnée, Al O Y, As Ga In, InGaAs, 4262C, 4255W, Détonateur laser, Photonique.
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English descriptors
- KwdEn :
- Fiber lasers, Gallium arsenides, Glass, High speed, High-power lasers, Indium arsenides, Laser ablation technique, Laser beams, Laser detonators, Measuring methods, Optical fibers, Photonics, Single mode fiber, Surface morphology, Ternary compounds, Time resolution, Titanium, Velocimeters, Velocity measurement, Wave front, YAG, ns range, ps range.
Abstract
We report on the development of novel high-speed techniques to measure the surface topography and instantaneous velocity of ablatively launched thin metal layers with sub-nanosecond temporal resolution. Applications for laser detonator technology require the understanding of laser fiber optical energy deposition and ablative launch of a thin metal layer into an explosive. Characterization of the ablation process requires a time-resolved diagnosis of the ejected material state (topography, velocity, density, pressure, etc.). A pulsed Nd:YAG fiber-coupled laser is used to ablate a 250 nm layer of titanium deposited on a 500 μm thick fused silica substrate at fluences below 10 J/cm2. Time-resolved imaging of the free expansion of the metal surface is accomplished with Fourier plane imaging using a Shack-Hartmann lenticular array coupled to a fast framing camera. The imager performs topographical surface measurements by detecting changes in the optical wavefront of a reflected picosecond probe laser beam off the expanding surface. Consequently, single-event sub-nanosecond time-resolved "movies" of surface motion dynamics are captured. Crosscheck of the Shack-Hartmann imager is done using advanced velocimetry. A 1550 nm heterodyne laser-based Photonic Doppler Velocimeter is used to measure surface velocity. Using a 1550 nm single mode fiber laser, 10 GHz InGaAs detectors and telecom hardware, we directly record the resulting beat signal produced by the accelerated surface onto a fast digitizer. Free surface velocities as high as 6.5 μm/ns are recorded. Comparisons between the dynamic topography, surface velocimetry and laser hydrocode simulations are presented.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Topographic imaging and velocity measurements of surface expansion during laser ablation of a metal layer on glass</title><author><name sortKey="Rodriguez, G" uniqKey="Rodriguez G">G. Rodriguez</name></author><author><name sortKey="Valenzuela, A R" uniqKey="Valenzuela A">A. R. Valenzuela</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Materials Science Division, MST-CINT Los Alamos National Laboratory, MS K771</s1><s2>Los Alamos, NM 87545</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">État du Mississippi</region></placeName></affiliation></author><author><name sortKey="Clarke, S A" uniqKey="Clarke S">S. A. Clarke</name></author><author><name sortKey="Thomas, K A" uniqKey="Thomas K">K. A. Thomas</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Dynamic Experimentation Division, DX-1 Los Alamos National Laboratory, MS P950</s1><s2>Los Alamos, NM 87545</s2><s3>USA</s3><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">État du Mississippi</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="inist">06-0504436</idno><date when="2006">2006</date><idno type="stanalyst">PASCAL 06-0504436 INIST</idno><idno type="RBID">Pascal:06-0504436</idno><idno type="wicri:Area/Main/Corpus">008637</idno><idno type="wicri:Area/Main/Repository">008113</idno></publicationStmt><seriesStmt><idno type="ISSN">0277-786X</idno><title level="j" type="main">Proceedings of SPIE, the International Society for Optical Engineering</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Fiber lasers</term><term>Gallium arsenides</term><term>Glass</term><term>High speed</term><term>High-power lasers</term><term>Indium arsenides</term><term>Laser ablation technique</term><term>Laser beams</term><term>Laser detonators</term><term>Measuring methods</term><term>Optical fibers</term><term>Photonics</term><term>Single mode fiber</term><term>Surface morphology</term><term>Ternary compounds</term><term>Time resolution</term><term>Titanium</term><term>Velocimeters</term><term>Velocity measurement</term><term>Wave front</term><term>YAG</term><term>ns range</term><term>ps range</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Front onde</term><term>Laser fibre</term><term>Mesure vitesse</term><term>Méthode mesure</term><term>Méthode ablation laser</term><term>Faisceau laser</term><term>Grande vitesse</term><term>Morphologie surface</term><term>Domaine temps ns</term><term>Résolution temporelle</term><term>Domaine temps ps</term><term>Fibre optique</term><term>Fibre monomode</term><term>Composé ternaire</term><term>Grenat aluminium yttrium</term><term>Gallium arséniure</term><term>Indium arséniure</term><term>Verre</term><term>Titane</term><term>Vélocimètre</term><term>Laser puissance</term><term>YAG</term><term>Y3Al5O12</term><term>Silice fusionnée</term><term>Al O Y</term><term>As Ga In</term><term>InGaAs</term><term>4262C</term><term>4255W</term><term>Détonateur laser</term><term>Photonique</term></keywords><keywords scheme="Wicri" type="concept" xml:lang="fr"><term>Verre</term><term>Titane</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We report on the development of novel high-speed techniques to measure the surface topography and instantaneous velocity of ablatively launched thin metal layers with sub-nanosecond temporal resolution. Applications for laser detonator technology require the understanding of laser fiber optical energy deposition and ablative launch of a thin metal layer into an explosive. Characterization of the ablation process requires a time-resolved diagnosis of the ejected material state (topography, velocity, density, pressure, etc.). A pulsed Nd:YAG fiber-coupled laser is used to ablate a 250 nm layer of titanium deposited on a 500 μm thick fused silica substrate at fluences below 10 J/cm<sup>2</sup>. Time-resolved imaging of the free expansion of the metal surface is accomplished with Fourier plane imaging using a Shack-Hartmann lenticular array coupled to a fast framing camera. The imager performs topographical surface measurements by detecting changes in the optical wavefront of a reflected picosecond probe laser beam off the expanding surface. Consequently, single-event sub-nanosecond time-resolved "movies" of surface motion dynamics are captured. Crosscheck of the Shack-Hartmann imager is done using advanced velocimetry. A 1550 nm heterodyne laser-based Photonic Doppler Velocimeter is used to measure surface velocity. Using a 1550 nm single mode fiber laser, 10 GHz InGaAs detectors and telecom hardware, we directly record the resulting beat signal produced by the accelerated surface onto a fast digitizer. Free surface velocities as high as 6.5 μm/ns are recorded. Comparisons between the dynamic topography, surface velocimetry and laser hydrocode simulations are presented.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0277-786X</s0></fA01><fA05><s2>6261</s2></fA05><fA06><s3>p.1</s3></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Topographic imaging and velocity measurements of surface expansion during laser ablation of a metal layer on glass</s1></fA08><fA09 i1="01" i2="1" l="ENG"><s1>High-power laser ablation VI : 7-12 May, 2006, Taos, New Mexico, USA</s1></fA09><fA11 i1="01" i2="1"><s1>RODRIGUEZ (G.)</s1></fA11><fA11 i1="02" i2="1"><s1>VALENZUELA (A. R.)</s1></fA11><fA11 i1="03" i2="1"><s1>CLARKE (S. A.)</s1></fA11><fA11 i1="04" i2="1"><s1>THOMAS (K. A.)</s1></fA11><fA12 i1="01" i2="1"><s1>PHIPPS (Claude R.)</s1><s9>ed.</s9></fA12><fA14 i1="01"><s1>Materials Science Division, MST-CINT Los Alamos National Laboratory, MS K771</s1><s2>Los Alamos, NM 87545</s2><s3>USA</s3><sZ>2 aut.</sZ></fA14><fA14 i1="02"><s1>Dynamic Experimentation Division, DX-1 Los Alamos National Laboratory, MS P950</s1><s2>Los Alamos, NM 87545</s2><s3>USA</s3><sZ>4 aut.</sZ></fA14><fA18 i1="01" i2="1"><s1>Society of Photo-optical Instrumentation Engineers</s1><s3>USA</s3><s9>org-cong.</s9></fA18><fA18 i1="02" i2="1"><s1>Los Alamos National Laboratory</s1><s3>USA</s3><s9>org-cong.</s9></fA18><fA18 i1="03" i2="1"><s1>Air Force Research Laboratory. Edwards Air Force Base California</s1><s3>USA</s3><s9>org-cong.</s9></fA18><fA18 i1="04" i2="1"><s1>European Office of Aerospace Research and Development</s1><s3>GBR</s3><s9>org-cong.</s9></fA18><fA20><s2>vol1, 62610O.1-62610O.10</s2></fA20><fA21><s1>2006</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA26 i1="01"><s0>0-8194-6326-4</s0></fA26><fA43 i1="01"><s1>INIST</s1><s2>21760</s2><s5>354000153510430200</s5></fA43><fA44><s0>0000</s0><s1>© 2006 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>9 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>06-0504436</s0></fA47><fA60><s1>P</s1><s2>C</s2></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Proceedings of SPIE, the International Society for Optical Engineering</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>We report on the development of novel high-speed techniques to measure the surface topography and instantaneous velocity of ablatively launched thin metal layers with sub-nanosecond temporal resolution. Applications for laser detonator technology require the understanding of laser fiber optical energy deposition and ablative launch of a thin metal layer into an explosive. Characterization of the ablation process requires a time-resolved diagnosis of the ejected material state (topography, velocity, density, pressure, etc.). A pulsed Nd:YAG fiber-coupled laser is used to ablate a 250 nm layer of titanium deposited on a 500 μm thick fused silica substrate at fluences below 10 J/cm<sup>2</sup>. Time-resolved imaging of the free expansion of the metal surface is accomplished with Fourier plane imaging using a Shack-Hartmann lenticular array coupled to a fast framing camera. The imager performs topographical surface measurements by detecting changes in the optical wavefront of a reflected picosecond probe laser beam off the expanding surface. Consequently, single-event sub-nanosecond time-resolved "movies" of surface motion dynamics are captured. Crosscheck of the Shack-Hartmann imager is done using advanced velocimetry. A 1550 nm heterodyne laser-based Photonic Doppler Velocimeter is used to measure surface velocity. Using a 1550 nm single mode fiber laser, 10 GHz InGaAs detectors and telecom hardware, we directly record the resulting beat signal produced by the accelerated surface onto a fast digitizer. Free surface velocities as high as 6.5 μm/ns are recorded. 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Conference</s1><s2>6</s2><s3>USA</s3><s4>2006</s4></fA30></pR></standard></inist></record>Pour manipuler ce document sous Unix (Dilib)
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