The obtain bandwidth e.g. of Yb:KGW and Yb:KYW is extremely large compared with that of Yb:YAG. This allows for extensive wavelength tunability and for Significantly shorter pulse durations from mode-locked lasers. Values very well down below 100 fs are reached with passive manner locking.The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, … Read More