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5 March 2021 Efficient pulsed Nd-doped fiber laser at 905 nm and frequency conversion to 452nm and 226nm
Kilian Le Corre, Hervé Gilles, Sylvain Girard, Alexandre Barnini, Louanne Kervella, Pascal Guitton, Thierry Robin, Giorgio Santarelli, Mathieu Laroche
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Proceedings Volume 11665, Fiber Lasers XVIII: Technology and Systems; 116651M (2021) https://doi.org/10.1117/12.2577661
Event: SPIE LASE, 2021, Online Only
Abstract
We present in this work, the development of a nanosecond pulsed Master-Oscillator Power-Amplifier (MOPA) laser system near 905 nm based on the 3-level transition of Neodymium using a novel low NA polarization-maintaining Nd-doped silica fiber with a 30µm core and 130µm cladding. The MOPA delivered up to 24 W of average power (0.6 mJ energy per pulse) with good beam quality (M²~1.4). Cascaded LBO and BBO crystals are used respectively for second-harmonic generation and fourth-harmonic generation, giving respectively average output powers of 4.9W at 452nm (conversion efficiency of 20%) and 550mW at 226nm (conversion efficiency of 10%).
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Kilian Le Corre, Hervé Gilles, Sylvain Girard, Alexandre Barnini, Louanne Kervella, Pascal Guitton, Thierry Robin, Giorgio Santarelli, and Mathieu Laroche "Efficient pulsed Nd-doped fiber laser at 905 nm and frequency conversion to 452nm and 226nm", Proc. SPIE 11665, Fiber Lasers XVIII: Technology and Systems, 116651M (5 March 2021); https://doi.org/10.1117/12.2577661
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KEYWORDS
Fiber lasers
Frequency conversion
Deep ultraviolet
Crystals
Harmonic generation
Pulsed laser operation
Oscillators
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