Recent progress on monolithic fiber amplifiers for next generation of gravitational wave detectors

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Wellmann, F.; Booker, P.; Hochheim, S.; Theeg, T.; de Varona, O. et al.: Recent progress on monolithic fiber amplifiers for next generation of gravitational wave detectors. In: Proceedings of SPIE 10512 (2018), 105120I. DOI: https://doi.org/10.1117/12.2289919

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Abstract: 
Single-frequency fiber amplifiers in MOPA configuration operating at 1064 nm (Yb3+) and around 1550 nm (Er3+ or Er3+:Yb3+) are promising candidates to fulfill the challenging requirements of laser sources of the next generation of interferometric gravitational wave detectors (GWDs). Most probably, the next generation of GWDs is going to operate not only at 1064 nm but also at 1550 nm to cover a broader range of frequencies in which gravitational waves are detectable. We developed an engineering fiber amplifier prototype at 1064 nm emitting 215 W of linearly-polarized light in the TEM00 mode. The system consists of three modules: the seed source, the pre-amplifier, and the main amplifier. The modular design ensures reliable long-term operation, decreases system complexity and simplifies repairing and maintenance procedures. It also allows for the future integration of upgraded fiber amplifier systems without excessive downtimes. We also developed and characterized a fiber amplifier prototype at around 1550 nm that emits 100 W of linearly-polarized light in the TEM00 mode. This prototype uses an Er3+:Yb3+ codoped fiber that is pumped off-resonant at 940 nm. The off-resonant pumping scheme improves the Yb3+-to-Er3+ energy transfer and prevents excessive generation of Yb3+-ASE.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Document Type: article
Publishing status: publishedVersion
Issue Date: 2018
Appears in Collections:Fakultät für Maschinenbau

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1 image of flag of Germany Germany 41 61.19%
2 image of flag of United States United States 12 17.91%
3 image of flag of China China 7 10.45%
4 image of flag of Spain Spain 3 4.48%
5 image of flag of United Kingdom United Kingdom 2 2.99%
6 image of flag of Iraq Iraq 1 1.49%
7 image of flag of Canada Canada 1 1.49%

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