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The generation of amplified spontaneous emission in high‐power CPA laser systems

An analytical model is presented describing the temporal intensity contrast determined by amplified spontaneous emission in high‐intensity laser systems which are based on the principle of chirped pulse amplification. The model describes both the generation and the amplification of the amplified spo...

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Autores principales: Keppler, Sebastian, Sävert, Alexander, Körner, Jörg, Hornung, Marco, Liebetrau, Hartmut, Hein, Joachim, Kaluza, Malte Christoph
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4845653/
https://www.ncbi.nlm.nih.gov/pubmed/27134684
http://dx.doi.org/10.1002/lpor.201500186
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author Keppler, Sebastian
Sävert, Alexander
Körner, Jörg
Hornung, Marco
Liebetrau, Hartmut
Hein, Joachim
Kaluza, Malte Christoph
author_facet Keppler, Sebastian
Sävert, Alexander
Körner, Jörg
Hornung, Marco
Liebetrau, Hartmut
Hein, Joachim
Kaluza, Malte Christoph
author_sort Keppler, Sebastian
collection PubMed
description An analytical model is presented describing the temporal intensity contrast determined by amplified spontaneous emission in high‐intensity laser systems which are based on the principle of chirped pulse amplification. The model describes both the generation and the amplification of the amplified spontaneous emission for each type of laser amplifier. This model is applied to different solid state laser materials which can support the amplification of pulse durations [Formula: see text]. The results are compared to intensity and fluence thresholds, e.g. determined by damage thresholds of a certain target material to be used in high‐intensity applications. This allows determining if additional means for contrast improvement, e.g. plasma mirrors, are required for a certain type of laser system and application. Using this model, the requirements for an optimized high‐contrast front‐end design are derived regarding the necessary contrast improvement and the amplified “clean” output energy for a desired focussed peak intensity. Finally, the model is compared to measurements at three different high‐intensity laser systems based on Ti:Sapphire and Yb:glass. These measurements show an excellent agreement with the model. [Image: see text]
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spelling pubmed-48456532016-04-29 The generation of amplified spontaneous emission in high‐power CPA laser systems Keppler, Sebastian Sävert, Alexander Körner, Jörg Hornung, Marco Liebetrau, Hartmut Hein, Joachim Kaluza, Malte Christoph Laser Photon Rev Original Papers An analytical model is presented describing the temporal intensity contrast determined by amplified spontaneous emission in high‐intensity laser systems which are based on the principle of chirped pulse amplification. The model describes both the generation and the amplification of the amplified spontaneous emission for each type of laser amplifier. This model is applied to different solid state laser materials which can support the amplification of pulse durations [Formula: see text]. The results are compared to intensity and fluence thresholds, e.g. determined by damage thresholds of a certain target material to be used in high‐intensity applications. This allows determining if additional means for contrast improvement, e.g. plasma mirrors, are required for a certain type of laser system and application. Using this model, the requirements for an optimized high‐contrast front‐end design are derived regarding the necessary contrast improvement and the amplified “clean” output energy for a desired focussed peak intensity. Finally, the model is compared to measurements at three different high‐intensity laser systems based on Ti:Sapphire and Yb:glass. These measurements show an excellent agreement with the model. [Image: see text] John Wiley and Sons Inc. 2015-12-30 2016-03 /pmc/articles/PMC4845653/ /pubmed/27134684 http://dx.doi.org/10.1002/lpor.201500186 Text en © 2015 The Authors. Laser & Photonics Reviews published by WILEY‐VCH Verlag GmbH & Co. KGaA Weinheim. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial (http://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Original Papers
Keppler, Sebastian
Sävert, Alexander
Körner, Jörg
Hornung, Marco
Liebetrau, Hartmut
Hein, Joachim
Kaluza, Malte Christoph
The generation of amplified spontaneous emission in high‐power CPA laser systems
title The generation of amplified spontaneous emission in high‐power CPA laser systems
title_full The generation of amplified spontaneous emission in high‐power CPA laser systems
title_fullStr The generation of amplified spontaneous emission in high‐power CPA laser systems
title_full_unstemmed The generation of amplified spontaneous emission in high‐power CPA laser systems
title_short The generation of amplified spontaneous emission in high‐power CPA laser systems
title_sort generation of amplified spontaneous emission in high‐power cpa laser systems
topic Original Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4845653/
https://www.ncbi.nlm.nih.gov/pubmed/27134684
http://dx.doi.org/10.1002/lpor.201500186
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