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

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

:

Clarkson, W.A. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Solid State Lasers XXIX: Technology and Devices : 4-6 February 2020, San Francisco, California
Bellingham, WA: SPIE, 2020 (Proceedings of SPIE 11259)
ISBN: 978-1-5106-3281-3
ISBN: 978-1-5106-3282-0
Paper 112590L, 7 pp.
Conference "Solid State Lasers - Technology and Devices" <29, 2020, San Francisco/Calif.>
English
Conference Paper
Fraunhofer ILT ()

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.

: http://publica.fraunhofer.de/documents/N-596076.html