Saturable absorber Cr~(4+):(Sr,Ca)Gd_(4)(SiO_(4))_(3)O crystals as Q switches for a diode-pumped Nd~(3+):KGd(WO_(4))_(2) laser

摘要

Passive Q switching of a diode-pumped Nd~(3+):KGd(WO_(4))_(2) laser is demonstrated by use of Cr~(4+): SrGd_(4)(SiO_(4))_(3)O and Cr~(4+):CaGd_(4)(SiO_(4))_(3)O crystals as saturable absorbers. An average output power of 40 mW was obtained with a pulse repetition rate of ～0.4 MHz.