Highly stable, high power hybrid fiber and Innoslab amplifier for narrow linewidth signals

P. Cebeci; J. V. Mosquera; M. Höfer; O. Fitzau; M. Giesberts; B. Erben; H.-D. Hoffmann

doi:10.1117/12.2545934

4 March 2020 Highly stable, high power hybrid fiber and Innoslab amplifier for narrow linewidth signals

P. Cebeci, J. V. Mosquera, M. Höfer, O. Fitzau, M. Giesberts, B. Erben, H.-D. Hoffmann

Proceedings Volume 11259, Solid State Lasers XXIX: Technology and Devices; 112590L (2020) https://doi.org/10.1117/12.2545934
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

Based on our study of a high stability ultra-narrow linewidth fiber amplifier for the gravitational wave detector LISA, we have set up a hybrid fiber and Innoslab amplifier for further power scaling into <100 Watt regime. The fiber amplifier can provide a seed power of up to 8 W at 1064 nm and a linewidth <10 kHz. The booster stage consists of an in-band pumped Innoslab amplifier, which is pumped by stabilized laser diodes at 880 nm. An output power of 437 W has already been demonstrated with almost diffraction-limited beam quality. Further investigations of power stability and modal properties are currently ongoing.

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P. Cebeci, J. V. Mosquera, M. Höfer, O. Fitzau, M. Giesberts, B. Erben, and H.-D. Hoffmann "Highly stable, high power hybrid fiber and Innoslab amplifier for narrow linewidth signals", Proc. SPIE 11259, Solid State Lasers XXIX: Technology and Devices, 112590L (4 March 2020); https://doi.org/10.1117/12.2545934

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