Low-NA single-mode LMA photonic crystal fiber amplifier

Thomas Tanggaard Alkeskjold, Marko Laurila, Lara Scolari, Jes Broeng, Marko Laurila

    Research output: Contribution to journalConference articleResearchpeer-review


    Enabling Single-Mode (SM) operation in Large-Mode-Area (LMA) fiber amplifiers and lasers is critical, since a SM output ensures high beam quality and excellent pointing stability. In this paper, we demonstrate and test a new design approach for achieving ultra-low NA SM rod fibers by using a spatially Distributed Mode Filter (DMF). This approach achieves SM performance in a short and straight rod fiber and allows preform tolerances to be compensated during draw. A low-NA SM rod fiber amplifier having a mode field diameter of ~60μm at 1064nm and a pump absorption of 27dB/m at 976nm is demonstrated.
    Original languageEnglish
    JournalProceedings of SPIE - The International Society for Optical Engineering
    Pages (from-to)79141S
    Publication statusPublished - 2011
    EventFiber Lasers 8: Technology, Systems, and Applications - San Francisco, CA, United States
    Duration: 24 Jan 201127 Jan 2011
    Conference number: 8


    ConferenceFiber Lasers 8
    Country/TerritoryUnited States
    CitySan Francisco, CA


    Dive into the research topics of 'Low-NA single-mode LMA photonic crystal fiber amplifier'. Together they form a unique fingerprint.

    Cite this