M. Karow
C. Basu
D. Kracht
J. Neumann
P. Weßels

TEM00 mode content of a two stage singlefrequency Yb-doped PCF MOPA with 246 W of output power

Opt. Express
Type: Zeitschriftenaufsatz (reviewed)
Gravitational wave detectors require linearly polarized singlefrequency laser sources with a high fractional TEM00 mode content. We investigated the modal decomposition of a polarization maintaining photonic crystal fiber with a mode field diameter of 29 µm, operating in a single-frequency master-oscillator power-amplifier scheme, with respect to the TEMnm modes. Low degradation of the beam quality with increasing pump power could be observed, while a maximum power in the TEM00 mode of 203 W was achieved.