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Solid-State Excitation Laser for Laser-Ultrasonics

Schnars, U. and Platz, W. and Mahnke, P. and Fix, A. and Frede, M. and Neumann, J. and Peuser, P. (2010) Solid-State Excitation Laser for Laser-Ultrasonics. 2nd International Symposium on Laser-Ultrasonics, 5-8 Juli, 2010 , Talence, Frankreich.

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The inspection speed of laser-ultrasonics compared with conventional ultrasonic testing is limited by the pulse repetition rate of the excitation laser. The maximum pulse repetition rate reported up to now for CO2-lasers, which are presently used for nearly all systems, is in the range of 400 Hz. In this paper a new approach based on a diode-pumped solid-state laser is discussed, which is currently being developed. This new excitation laser is designed for a repetition rate of 1 kHz and will operate at a mid-IR wavelength of 3.3 m. The higher repeti-tion rate enables a higher inspection speed, whereas the mid-IR wavelength anticipates a better coupling efficiency. The total power for pumping the laser crystals is transported via flexible optical fibres to the compact laser head, thus allowing operation on a robot arm. The laser head consists of a master oscillator feeding several lines of power amplifiers and in-cludes nonlinear optical wavelength conversion by an optical parametric process. It is char-acterized by a modular construction which provides optimal conditions for operation at high average power as well as for easy maintenance. These features will enable building reliable, long-lived, rugged, smart laser ultrasonic systems in future

Item URL in elib:https://elib.dlr.de/64751/
Document Type:Conference or Workshop Item (Speech)
Title:Solid-State Excitation Laser for Laser-Ultrasonics
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schnars, U.Airbus, BremenUNSPECIFIED
Platz, W.EADS Innovation Works, MünchenUNSPECIFIED
Frede, M.Laser Zentrum Hannover, HannoverUNSPECIFIED
Neumann, J.Laser Zentrum Hannover, HannoverUNSPECIFIED
Peuser, P. EADS Innovation Works, MünchenUNSPECIFIED
Date:July 2010
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Mid-infrared laser, Optical parametric oscillator,High repetition rate , Laser ultrasonics
Event Title:2nd International Symposium on Laser-Ultrasonics
Event Location:Talence, Frankreich
Event Type:international Conference
Event Dates: 5-8 Juli, 2010
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Fix, Dr.rer.nat. Andreas
Deposited On:02 Aug 2010 15:32
Last Modified:31 Jul 2019 19:28

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