The first demonstration of a 639-nm regenerative laser amplifier

Naoto Sugiyama, Shogo Fujita, Yusaku Hara, Fumihiko Kannari

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    High-power picosecond lasers in the visible and ultraviolet wavelength hold a lot of advantages in various applications. The high absorption efficiency in the various metals leads to the higher removal rates, and the shorter pulse widths can suppress thermal influence during the material processing. Recently, the significant progress in the output power of indium gallium nitride (InGaN)-based laser diodes (LDs) has developed the compact high-power lasers which oscillate directly in the visible wavelength. For example, a continuous-wave laser output power of >6.7 W at the fundamental wavelength of 639 nm was reported with a praseodymium-doped LiYF4 crystal (Pr:YLF) [1]. Moreover, mode-locked picosecond lasers were also reported using a SESAM saturable absorber with Pr:YLF lasers [2,3]. Further scaling of visible picosecond laser pulse requires an amplifier, but only few experiments were reported on the visible laser amplifiers [4]. For example, the maximum amplification factor of 10 was demonstrated at 478 nm [5]. In this paper, a 639-nm picosecond-pulse regenerative amplifier using a Pr:YLF crystal is demonstrated for the first time.

    Original languageEnglish
    Title of host publicationThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019
    PublisherOSA - The Optical Society
    ISBN (Electronic)9781557528209
    Publication statusPublished - 2019 Jan 1
    EventThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019 - Munich, Germany
    Duration: 2019 Jun 232019 Jun 27

    Publication series

    NameOptics InfoBase Conference Papers
    VolumePart F140-CLEO_Europe 2019

    Conference

    ConferenceThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019
    CountryGermany
    CityMunich
    Period19/6/2319/6/27

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Mechanics of Materials

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  • Cite this

    Sugiyama, N., Fujita, S., Hara, Y., & Kannari, F. (2019). The first demonstration of a 639-nm regenerative laser amplifier. In The European Conference on Lasers and Electro-Optics, CLEO_Europe_2019 [2019-ca_4_3] (Optics InfoBase Conference Papers; Vol. Part F140-CLEO_Europe 2019). OSA - The Optical Society.