Journal Article

PUBDB-2023-03817

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Evolutionary optimization and long-term stabilization of a white-light seeded two-stage OPCPA seed laser

Eichner, T. (Corresponding author)Extern*DESY* ; Hülsenbusch, T.DESY* ; Palmer, G.XFEL.EU*DESY* ; Maier, A.Extern*DESY*

2023
Optica Washington, DC

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Please use a persistent id in citations: doi:10.1364/OE.504694  doi:10.3204/PUBDB-2023-03817

Abstract: Ultrafast laser systems, such as optical parametric chirped pulse amplifiers (OPCPA), are complex tools. Optimizing laser performance for a given application is often plagued by intricate couplings between different output parameters, making simultaneous control of multiple pulse properties difficult. Here, we experimentally demonstrate an autonomous tuning procedure of a white-light seeded two-stage OPCPA using an evolutionary strategy to reliably reach an optimized working point. We use the data collected during the tuning procedure to calibrate a performance model of the laser system, which we then apply to stabilize the intricately coupled laser output energy and spectrum simultaneously. Our approach ensures reliable day-to-day operation at optimized working points without manual tuning. We demonstrate shot-to-shot energy stability of <0.18 % rms, in combination with <25 pm rms wavelength stability and <0.2 % rms bandwidth stability during multi-day operation.

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Contributing Institute(s):

1. Laser für Plasmabeschleunigung (MLS)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)

Experiment(s):

1. Kilowatt Average Power Laser at DESY for Revolutionary Accelerators

Appears in the scientific report 2023

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