The achieve bandwidth e.g. of Yb:KGW and Yb:KYW is rather significant as opposed with that of Yb:YAG. This permits for wide wavelength tunability and for much shorter pulse durations from mode-locked lasers. Values well below 100 fs are already reached with passive manner locking.The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when comp… Read More