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Frequency and timing stability of an airborne injection-seeded Nd:YAG laser system for direct-detection wind lidar

Lemmerz, Christian and Lux, Oliver and Reitebuch, Oliver and Witschas, Benjamin and Wührer, Christian (2017) Frequency and timing stability of an airborne injection-seeded Nd:YAG laser system for direct-detection wind lidar. Applied Optics, 56 (32), pp. 9057-9068. Optical Society of America. DOI: 10.1364/AO.56.009057 ISSN 1559-128X

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Official URL: http://ao.osa.org/abstract.cfm?URI=ao-56-32-9057


We report on the design and performance of the laser deployed in the airborne demonstrator Doppler wind lidar for the Aeolus mission of the European Space Agency (ESA). The all-solid-state, diode-pumped and frequency-tripled Nd:YAG laser is realized as a master oscillator power amplifier (MOPA) system, generating 60 mJ of single-frequency pulses at 355 nm wavelength, 50 Hz repetition rate and 20 ns pulse duration. For the measurement of the Doppler frequency shift over several accumulated laser shots, the frequency stability of the laser is of crucial importance. Injection-seeding, in combination with an active cavity control based on the Ramp-Delay-Fire technique, provides a pulse-to-pulse frequency stability of 0.25 MHz measured at 1064 nm under laboratory conditions. This value increases to 0.31 MHz for airborne operation in a vibration environment that has been characterized by multiple acceleration sensors during different flight conditions. In addition, a pure Ramp-Fire setting was tested for comparison leading to a frequency stability of 0.16 MHz both in airborne operation and on ground. The laser cavity control electronics also have to provide a trigger signal for the lidar detection electronics, about 60 µs prior to the expected laser pulse emission and with high timing stability. An in-flight timing stability of below 100 ns was measured decreasing to 20 ns for a shorter pre-trigger time of 10 µs.

Item URL in elib:https://elib.dlr.de/115495/
Document Type:Article
Title:Frequency and timing stability of an airborne injection-seeded Nd:YAG laser system for direct-detection wind lidar
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lemmerz, Christiandlr, ipaUNSPECIFIED
Lux, Oliverdlr, ipahttps://orcid.org/0000-0003-1491-0323
Reitebuch, Oliverdlr, ipaUNSPECIFIED
Witschas, Benjamindlr, ipaUNSPECIFIED
Wührer, ChristianAirbus DSUNSPECIFIED
Date:November 2017
Journal or Publication Title:Applied Optics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1364/AO.56.009057
Page Range:pp. 9057-9068
Publisher:Optical Society of America
Keywords:Lidar; Lasers, single-mode; Lasers, ultraviolet; Laser stabilization ; Remote sensing and sensors
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Projekt ADM
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Lemmerz, Christian
Deposited On:16 Nov 2017 14:57
Last Modified:16 Nov 2017 14:57

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