@inproceedings{5efca22694c0466e8c94a7206ec93d68,
title = "Thulium- and Holmium-doped high stability fiber amplifiers at 2 µm for next generation gravitational wave detectors",
abstract = "Within the context of the E-TEST (Einstein Telescope EMR Site \& Technology) project, Fraunhofer ILT develops thulium- and holmium-based seed sources and fiber lasers at app. 2 µm wavelength with highest demands on linewidth and stability for usage in a third-generation gravitational wave detector, the Einstein telescope. To fulfill the requirements, we develop a seed laser and a multi-stage fiber amplifier, consisting of holmium-doped fibers. Within this paper, we present our current laser concept and the first results of our dual-stage holmium-doped fiber amplifier stage. We achieve a low linewidth (< 2 MHz) output power of more than 5 W at a wavelength of 2095 nm. By using our in-house developed fiber laser simulation, we show that the efficiency of our amplifier is currently limited by pair induced quenching and the potential for further power scaling.",
keywords = "Fiber Amplifier, Fiber Laser, Holmium-doped, Low-Noise, Narrow Linewidth, Relative Intensity Noise, Thulium-doped",
author = "P. Baer and A. Elshani and M. Reiter and P. Cebeci and M. Giesberts and J. Ebert and M. Hoefer and D. Hoffmann",
note = "Publisher Copyright: {\textcopyright} 2023 SPIE.; Fiber Lasers XX: Technology and Systems 2023 ; Conference date: 30-01-2023 Through 02-02-2023",
year = "2023",
doi = "10.1117/12.2649611",
language = "英语",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Supradeepa, \{V. R.\}",
booktitle = "Fiber Lasers XX",
}