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  4. Diode-pumped Alexandrite laser instrument for next generation satellite-based Earth observation
 
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2019
Conference Paper
Title

Diode-pumped Alexandrite laser instrument for next generation satellite-based Earth observation

Abstract
In this work the first diode-pumped Alexandrite ring laser in Q-switched single-longitudinal mode (SLM) operation is presented. A carefully designed and complex ring resonator with several functional components is combined with an innovative pumping scheme with high-power red laser diodes. The spectral and energetic suitability of a first laser was demonstrated in hundreds of operating hours and, with a novel mobile lidar system, by the first measurements in the atmosphere by means of a diode-pumped Alexandrite laser, yielding data from the stratosphere to the mesosphere. An improved laser yields a pulse energy of 1.7 mJ at a repetition rate of 500 Hz with an excellent beam quality ofM2 < 1.1. By seeding the resonator with a narrow-band diode laser, SLM operation with a linewidth below 4 MHz is achieved. The electro-optical efficiency of 2 % is the highest archived for all Alexandrite lasers in SLM operation and reasonable for space-operation. The performance analysis as well as benchmarking with the space-qualified mounting technology point out the TRL and the remaining effort of development of the technology.
Author(s)
Strotkamp, Michael  orcid-logo
Munk, Alexander  
Jungbluth, Bernd  
Hoffmann, Hans-Dieter  
Höffner, Josef
Mainwork
International Conference on Space Optics, ICSO 2018  
Conference
International Conference on Space Optics (ICSO) 2018  
DOI
10.1117/12.2535934
Additional full text version
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Language
English
Fraunhofer-Institut für Lasertechnik ILT  
Keyword(s)
  • Alexandrite laser

  • diode-pumped laser

  • ring laser

  • single-longitudinal mode laser

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