Femtosecond CPA hybrid laser system with pulse-on-demand operation

Černe, Luka (author), Petelin, Jaka (author), Petkovšek, Rok (author)

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
• UDC: 681.7.069.24(045)
• ISSN on article: 1094-4087
• DOI: 10.1364/OE.386769
• COBISS.SI-ID: 17063707

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

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

Secondary language

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