We demonstrated amplifying the output of a MISER to several Watt power without increasing its line width.
R. Nicolaescu, Th. Walther, E. S. Fry and M. Muendel, Ultra-narrow linewidth, efficient amplification of low power seed sources by a fiber amplifier, Appl. Opt. 38 (1999) 1784
Operation of a two-staged Yb-doped fiber amplifier down to 1014.8 nm was demonstrated. In order to overcome ground state absorption at the signal wavelength the fiber was cooled down to liquid nitrogen temperatures.
Albert Seifert, Mathias Sinther, Thomas Walther, Edward S. Fry, Narrow-linewidth, multi-Watt Yb:doped fiber amplifier at 1014.8 nm, Appl. Opt. 45 (2006) 7908
A three stage Yb-doped fiber amplifier exhibiting Fourier-transform limited pulses in the ns-regime has been demonstrated. The power was limited by the onset of stimulated Brillouin scattering. A careful optimization of fiber parameters was necessary in order to achieve the energy levels in question.
Kai Schorstein and Thomas Walther, A high spectral brightness Fourier transform limited nanosecond Yb-doped fiber amplifier, Applied Physics B 97 (2009)591
Prof. Dr. Thomas Walther
Laser und Quantenoptik
Institut für Angewandte Physik
Fachbereich 05 - Physik
Technische Universität Darmstadt
Schlossgartenstr. 7
D-64289 Darmstadt
+49 6151 16-20831 (Sekretariat)
+49 6151 16-20834 (Fax)
Thomas.Walther@physik.tu-...
03.04.19