High-speed ablation of ultradeep channels by a phase-conjugate dynamically controlled passively Q-switched Nd:YAG laser

Journal Article · Wed Oct 31 04:00:00 EDT 2007 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2007V037N10ABEH013624· OSTI ID:21466733

Basiev, T T; Garnov, S V; Klimentov, S M; Pivovarov, P A ^[1]; Gavrilov, A V; Smetanin, S N; Solokhin, S A; Fedin, A V ^[2]

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1. A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
2. V.A.Degtyarev Kovrov State Technological Academy, Kovrov, Vladimir region (Russian Federation)

Parameters of high-speed ablation of ultradeep channels by controlled pulse trains from a single-mode phase-conjugate dynamic cavity Nd:YAG laser emitting 20-200-ns, 70-250-mJ pulses at a pulse repetition rate in a train of 40-250 kHz are studied. The optimal parameters of ablation are found, for which a long-lived region of a hot rarefied gas was maintained in the ultradeep channel, which suppressed the shielding action of the surface plasma. The control of the lasing process during ablation optimises not only the heating and plasma formation, but also the removal of the processed material in the pause between laser pulses. Adaptive regulation of lasing parameters during ablation made it possible to obtain ultradeep channels of length 8-27 mm and diameters 80-300 {mu}m of the input and output holes in metals (aluminium, steel and Inconel 718 nickel superalloy) and ultrahard ceramics (Al{sub 2}O{sub 3}, AlN, SiC). (special issue devoted to the 25th anniversary of the a.m. prokhorov general physics institute)

• OSTI ID: 21466733
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 10 Vol. 37; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABLATION
ALLOY-NI53CR19FE19NB5MO3
ALLOYS
ALUMINIUM
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
ALUMINIUM OXIDES
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
CERAMICS
CHALCOGENIDES
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
ELEMENTS
FREQUENCY RANGE
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HEATING
HOLES
INCONEL 718
INCONEL ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
KHZ RANGE
LASER CAVITIES
LASERS
MATERIALS
METALS
MOLYBDENUM ALLOYS
NEODYMIUM LASERS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLASMA HEATING
PLASMA PRODUCTION
PNICTIDES
PULSES
Q-SWITCHING
SILICON CARBIDES
SILICON COMPOUNDS
SOLID STATE LASERS
STEELS
SURFACES
TITANIUM ADDITIONS
TITANIUM ALLOYS
TRANSITION ELEMENT ALLOYS