26 February 2018 Recent progress on monolithic fiber amplifiers for next generation of gravitational wave detectors
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Proceedings Volume 10512, Fiber Lasers XV: Technology and Systems; 105120I (2018) https://doi.org/10.1117/12.2289919
Event: SPIE LASE, 2018, San Francisco, California, United States
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.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Felix Wellmann, Felix Wellmann, Phillip Booker, Phillip Booker, Sven Hochheim, Sven Hochheim, Thomas Theeg, Thomas Theeg, Omar de Varona, Omar de Varona, Willy Fittkau, Willy Fittkau, Ludger Overmeyer, Ludger Overmeyer, Michael Steinke, Michael Steinke, Peter Weßels, Peter Weßels, Jörg Neumann, Jörg Neumann, Dietmar Kracht, Dietmar Kracht, } "Recent progress on monolithic fiber amplifiers for next generation of gravitational wave detectors", Proc. SPIE 10512, Fiber Lasers XV: Technology and Systems, 105120I (26 February 2018); doi: 10.1117/12.2289919; https://doi.org/10.1117/12.2289919
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