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Nonlinear optical frequency conversion with KTP and BiBO crystals for lasers in space

Potreck, Arne and Schröder, Helmut and Lammers, Melanie and Tzeremes, Georgios and Riede, Wolfgang (2014) Nonlinear optical frequency conversion with KTP and BiBO crystals for lasers in space. In: Proceedings of SPIE - The International Society for Optical Engineering. Pacific RIM Laser Damage 2014, 22.-24. April 2014, Yokohama, Japan.

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Within ESA’s ADM-Aeolus and EarthCARE missions Doppler-wind Lidar systems will be operated in the Earth’s orbit to measure global wind profiles. The active instrument will be based on a Nd:YAG laser, frequency tripled by nonlinear optical crystals. Different crystals are therefore to compare and qualify in regard of their space acceptability. A dedicated set-up to measure the maximum conversion efficiencies and its stability during longterm operation for KTP crystals (SHG) and BiBO crystals (SHG and THG) is presented in this work. In order to detect gray-tracking and its influence on thermal lensing in situ, measurements with a Shack-Hartmann sensor and a co-aligned HeNe laser were performed. Conversion efficiencies were 76±3 % at SHG for KTP and BiBO crystals and 48±2 % at THG with a combination of two BiBO crystals. During longterm experiments of 60 million laser pulses, conversion efficiencies were demonstrated to be stable over time (±1 % at SHG with KTP and ±2 % at THG with BiBO). The occurrence of gray-tracking was detected in the KTP crystal and the resulting thermal lensing with an exponential saturation over time was observed in situ.

Item URL in elib:https://elib.dlr.de/90810/
Document Type:Conference or Workshop Item (Speech)
Title:Nonlinear optical frequency conversion with KTP and BiBO crystals for lasers in space
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Potreck, ArneDLR StuttgartUNSPECIFIED
Schröder, HelmutDLR StuttgartUNSPECIFIED
Lammers, MelanieDeutsches Zentrum für Luft und Raumfahrt, Stuttgart, GermanyUNSPECIFIED
Tzeremes, GeorgiosEuropean Space Agency (ESA/ESTEC)UNSPECIFIED
Riede, Wolfgangwolfgang.riede (at) dlr.deUNSPECIFIED
Date:22 September 2014
Journal or Publication Title:Proceedings of SPIE - The International Society for Optical Engineering
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
EditorsEmailEditor's ORCID iD
Keywords:Nonlinear crystals, frequency conversion, KTP, BiBO
Event Title:Pacific RIM Laser Damage 2014
Event Location:Yokohama, Japan
Event Type:international Conference
Event Dates:22.-24. April 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology (old)
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Schröder, Dr.rer.nat. Helmut
Deposited On:09 Oct 2014 13:11
Last Modified:31 Jul 2019 19:48

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