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Femtosecond CPA hybrid laser system with pulse-on-demand operation
ID Černe, Luka (Author), ID Petelin, Jaka (Author), ID Petkovšek, Rok (Author)

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Abstract
In this manuscript we present a true pulse-on-demand concept of a hybrid CPA laser system, consisting of a chirped-pulse fiber amplifier and an additional solid-state amplifier, capable of generating femtosecond pulses on demand without an external optical modulator/shutter. Pulse-on-demand operation is achieved by introducing idler pulses with a few nanoseconds duration and selectively switching between the femtosecond and idler pulses. The idler pulses are used to maintain a constant population inversion in the fiber amplifier as well as in the solid-state amplifier. Second harmonic generation (SHG) unit then effectively filters out the idler pulses due to their low peak power, leaving only a stable femtosecond pulse train. This concept is demonstrated on a CPA hybrid system that can generate pulses with up to 200 [mikro] J at 515 nm with a pulse duration under 450 fs. As there is no optical modulator at the laser output, the presented concept also enables further power scaling.

Language:English
Keywords:fiber lasers, pulse on demand, hybrid lasers, ultrashort pulses
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Version of Record
Year:2020
Number of pages:Str. 7875-7888
Numbering:Vol. 28, no. 6, art. 386769
PID:20.500.12556/RUL-126438 This link opens in a new window
UDC:681.7.069.24(045)
ISSN on article:1094-4087
DOI:10.1364/OE.386769 This link opens in a new window
COBISS.SI-ID:17063707 This link opens in a new window
Copyright:
V članku navedeno: "© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement"; https://www.osapublishing.org/library/license_v1.cfm (22. 4. 2021).
Publication date in RUL:22.04.2021
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Downloads:397
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Record is a part of a journal

Title:Optics express
Shortened title:Opt. express
Publisher:Optical Society of America
ISSN:1094-4087
COBISS.SI-ID:8636438 This link opens in a new window

Secondary language

Language:Slovenian
Keywords:vlakenski laserji, bliski na zahtevo, hibridni laserji, ultrakratki bliski

Projects

Funder:ARRS - Slovenian Research Agency
Project number:L2-8183
Name:VISOKO PRILAGODLJIVI VLAKENSKI LASERJI VELIKIH MOČI ZA UPORABO V INDUSTRIJI

Funder:ARRS - Slovenian Research Agency
Project number:L2-9240
Name:Ultrakratki laserski pulzi na zahtevo

Funder:ARRS - Slovenian Research Agency
Project number:P2-0270
Name:Proizvodni sistemi, laserske tehnologije in spajanje materialov

Funder:EC - European Commission
Name:Building blocks, tools and systems for factories of future
Acronym:GOSTOP

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