NOT KNOWN DETAILS ABOUT KYW CRYSTAL

The acquire bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly large compared with that of Yb:YAG. This enables for large wavelength tunability and for much shorter pulse durations from method-locked lasers. Values effectively down below a hundred fs have already been attained with passive manner locking.The Yb-doped potassium yttrium tungstate (Yb