Spectral beam combination of fiber amplified ns-pulses by means of interference filters.
In this paper we introduce a simple scheme to spectrally combine four single beams using three low-cost dielectric interference filters as combining elements. 25 ns pulses from four independent and actively Q-switched fiber seed-sources are amplified in a single stage fiber-amplifier. Temporally and spatially combined 208 W of average power and 6.3 mJ of pulse energy are obtained at two different repetition frequencies. A detailed analysis of beam quality as well as the thermal behavior of the combining elements is carried out and reveals mutual dependency.
Schmidt
O
O
Friedrich-Schiller University, Institute of Applied Physics, Albert-Einstein-Str. 15, 07745 Jena, Germany. schmidt.oliver@uni-jena.de
Wirth
C
C
Nodop
D
D
Limpert
J
J
Schreiber
T
T
Peschel
T
T
Eberhardt
R
R
Tünnermann
A
A
D000669:Amplifiers, Electronic; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D012031:Refractometry / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*