elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

Water Vapour Differential Absorption Lidar measurements at 935 nm using a Nd:YGG laser

Fix, Andreas und Löhring, Jens und Meissner, Ansgar und Hoffmann, Dieter und Ehret, Gerhard und Alpers, Matthias (2010) Water Vapour Differential Absorption Lidar measurements at 935 nm using a Nd:YGG laser. In: Reviewed and revised papers presented at the 25th International Laser Radar Conference. 25th International Laser Radar Conference, 5.-9. Jul. 2010, St. Petersburg, Russia. ISBN 978-5-94458-109-9.

[img] PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
294kB

Kurzfassung

A novel diode-pumped, single-frequency laser system emitting at 935 nm was developed to serve as the transmitter for water differential absorption lidar measurements. This laser uses Nd:YGG (Y3Ga5O12) as the active medium. The system was directly diode-pumped at 806 nm and was built up in a master-oscillator power-amplifier configuration. It consists of a stable resonator in rod geometry and employs as the amplifier a stable-unstable hybrid resonator in an end-pumped slab design. Single frequency operation is achieved by injection seeding. The range of continuously tunable single-frequency radiation extends to ~0.4 nm centered around 935.31 nm. More than 30 mJ of pulse energy at 100 Hz repetition rate with a beam quality (M2) of better than 1.4 and Q-switched pulse duration of 52 ns in single frequency mode were generated. Since water vapor DIAL demands for stringent requirements for the spectral properties those were carefully investigated. Values of the spectral purity of >99.995% were determined using long-pass absorption measurements in the atmosphere exceeding the requirements by a large margin. Finally, first time water vapor DIAL measurements were performed using a Nd:YGG laser. The reported results show much promise of these directly pumped lasers at 935 nm for future space-borne and airborne water vapor lidar systems.

Dokumentart:Konferenzbeitrag (Poster)
Titel:Water Vapour Differential Absorption Lidar measurements at 935 nm using a Nd:YGG laser
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Fix, AndreasDLR
Löhring, JensILT
Meissner, AnsgarILT
Hoffmann, DieterILT
Ehret, GerhardDLR
Alpers, MatthiasDLR
Datum:5 Juli 2010
Erschienen in:Reviewed and revised papers presented at the 25th International Laser Radar Conference
ISBN:978-5-94458-109-9
Status:veröffentlicht
Stichwörter:Lidar, Laser, Wasserdampf
Veranstaltungstitel:25th International Laser Radar Conference
Veranstaltungsort:St. Petersburg, Russia
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:5.-9. Jul. 2010
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Projekt WALES (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Lidar
Hinterlegt von: Dr.rer.nat. Andreas Fix
Hinterlegt am:06 Dez 2010 16:59
Letzte Änderung:06 Dez 2010 17:00

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.