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Frequency jitter and spectral width of an injection-seeded Q-switched Nd:YAG laser for a Doppler wind lidar

Schröder, Torsten and Lemmerz, Christian and Reitebuch, Oliver and Wirth, Martin and Wührer, Christian and Treichel, Rainer (2007) Frequency jitter and spectral width of an injection-seeded Q-switched Nd:YAG laser for a Doppler wind lidar. Applied Physics B, 87, pp. 437-444. DOI: 10.1007/s00340-007-2627-5.

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Official URL: http://dx.doi.org/10.1007/s00340-007-2627-5


The design of a 50 Hz single longitudinal mode, diode-pumped and frequency-tripled Nd:YAG master oscillator power amplifier is described, and the first measurements of output parameters are presented. The laser oscillator is injection-seeded by a tuneable monolithic Nd:YAG ring laser and frequency stabilized by minimising the Q-switch build-up time. The laser system will be an integral part of an airborne instrument demonstrator for a first satellite based Doppler wind lidar to measure vertical profiles of one component of the atmospheric wind vector. This paper focuses on the investigation of the frequency jitter and the linewidth of the laser, which are measured on a pulse-to-pulse basis. For this purpose a compact, high accuracy beat frequency monitoring system has been developed at DLR. By operating the amplifier stage at half the repetition rate (50 Hz) of the oscillator, we could reduce the frequency stability from 10 MHz (rms) to 1.3 MHz (rms) (over a 14 s period). We have determined a mean linewidth of 15 MHz (FWHM) at 1064 nm. These measured laser parameters enable wind velocity measurements in the atmosphere (0–15 km) at an accuracy of 1 to 2 m/s.

Document Type:Article
Title:Frequency jitter and spectral width of an injection-seeded Q-switched Nd:YAG laser for a Doppler wind lidar
AuthorsInstitution or Email of Authors
Schröder, TorstenUNSPECIFIED
Lemmerz, ChristianUNSPECIFIED
Reitebuch, OliverUNSPECIFIED
Wührer, ChristianEADS-Astrium Ottobrunn
Treichel, RainerEADS-Astrium Friedrichshafen
Date:May 2007
Journal or Publication Title:Applied Physics B
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 437-444
Keywords:Nd:YAG laser, Doppler wind lidar
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Projekt ADM II (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Oliver Reitebuch
Deposited On:11 Sep 2007
Last Modified:20 Oct 2014 14:31

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