Diode pumped solid state kilohertz disk laser system for time-resolved combustion diagnostics under microgravity at the drop tower Bremen

We describe a specially designed diode pumped solid state laser system based on the disk laser architecture for combustion diagnostics under microgravity (μg) conditions at the drop tower in Bremen. The two-stage oscillator-amplifier-system provides an excellent beam profile (TEM00) at narrowband op...

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Veröffentlicht in:Review of scientific instruments 2014-03, Vol.85 (3), p.033106-033106
Hauptverfasser: Wagner, Volker, Paa, Wolfgang, Triebel, Wolfgang, Eigenbrod, Christian, Klinkov, Konstantin, Larionov, Mikhail, Giesen, Adolf, Stolzenburg, Christian
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container_end_page 033106
container_issue 3
container_start_page 033106
container_title Review of scientific instruments
container_volume 85
creator Wagner, Volker
Paa, Wolfgang
Triebel, Wolfgang
Eigenbrod, Christian
Klinkov, Konstantin
Larionov, Mikhail
Giesen, Adolf
Stolzenburg, Christian
description We describe a specially designed diode pumped solid state laser system based on the disk laser architecture for combustion diagnostics under microgravity (μg) conditions at the drop tower in Bremen. The two-stage oscillator-amplifier-system provides an excellent beam profile (TEM00) at narrowband operation (Δλ < 1 pm) and is tunable from 1018 nm to 1052 nm. The laser repetition rate of up to 4 kHz at pulse durations of 10 ns enables the tracking of processes on a millisecond time scale. Depending on the specific issue it is possible to convert the output radiation up to the fourth harmonic around 257 nm. The very compact laser system is integrated in a slightly modified drop capsule and withstands decelerations of up to 50 g (>11 ms). At first the concept of the two-stage disk laser is briefly explained, followed by a detailed description of the disk laser adaption to the drop tower requirements with special focus on the intended use under μg conditions. In order to demonstrate the capabilities of the capsule laser as a tool for μg combustion diagnostics, we finally present an investigation of the precursor-reactions before the droplet ignition using 2D imaging of the Laser Induced Fluorescence of formaldehyde.
doi_str_mv 10.1063/1.4867667
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source AIP Journals Complete; Alma/SFX Local Collection
subjects AMPLIFIERS
BEAM PROFILES
CAPSULES
COMBUSTION
COOLING TOWERS
Deceleration
DESIGN
DIODE-PUMPED SOLID STATE LASERS
Drop towers
FLUORESCENCE
FORMALDEHYDE
IGNITION
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Laser induced fluorescence
Lasers
Microgravity
Narrowband
OSCILLATORS
Scientific apparatus & instruments
Solid state lasers
TIME RESOLUTION
title Diode pumped solid state kilohertz disk laser system for time-resolved combustion diagnostics under microgravity at the drop tower Bremen
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