Uwe Griebner

TL;DR: A passively mode-locked Ho:YAG ceramic laser around 2.1 µm is demonstrated using GaSb-based near-surface SESAM as saturable absorber and spectroscopic properties of Ho: YAG ceramics at room temperature are presented.

TL;DR: In this paper, the physical, spectral and laser properties of a new ytterbium-doped phosphate laser glass, QX/Yb, have been developed, which has a low thermal expansion coefficient and a negative temperature coefficient of refractive index, resulting in an acceptable athermal behavior and an excellent thermal loading capability.

TL;DR: The crystal growth, spectroscopy characterization and first laser operation of a new tetragonal disordered "mixed" calcium aluminate crystal, Tm:Ca(Gd,Lu)AlO4, which is promising for tunable/femtosecond lasers at ~2 μm is reported.

TL;DR: A mode-locked (ML) femtosecond laser based on the disordered garnet crystal Tm,Ho:CNGG is demonstrated based on a single-walled carbon nanotube saturable absorber and pulses as short as 83 and 76 fs at 2081 nm are achieved without and with external compression.

TL;DR: Small-angle, noncollinear, first- and second-order interferometric autocorrelation experiments with Ti:sapphire laser pulses of 9-80-fs duration have been performed with microaxicon arrays, indicating contributions to autocOrrelation by nonlinear refraction and travel-time differences.