In situ characterization of semiconductor saturable absorber mirrors in an operating Yb:KGW mode-locked laser.
We report in situ characterization of a semiconductor saturable absorber mirror (SESAM) in an operating Yb:KGW mode-locked laser. The technique may be described as a pump-probe experiment in which the intracavity beam acts as a pump beam while the output of the same laser is used as a test beam for the SESAM reflectivity. At zero delay, the probe pulse overlaps in time with the subsequent intracavity pulse. The method is an alternative to standard pump-probe measurements in situations where the intracavity parameters such as energy fluence onto the SESAM, pulse length, and center wavelength cannot be achieved simultaneously with available lasers.
Paunescu
Gabriela
G
Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany. paunescu@ioq.uni-jena.de
Hein
Joachim
J
Sauerbrey
Roland
R
Richter
Wolfgang
W