Abstract
Passive Q-switching employing saturable absorbers is simple and yet practical. In this paper we report two solid-state saturable absorbers for the ruby laser, i.e., Cr4+:GSGG and Dy2+:CaF2. The absorption peak near 694 nm is assigned to the 3T2 to 1E2 transition in the octahedral site for Cr4+:GSGG,‘ and 5I8 to 4f-5d band transitions for Dy2+:CaF2.2 Bleaching measurements of these two saturable absorbers were performed using an electro-optic Q-switched ruby laser. The results are shown in Fig. 1 and Fig. 2.
© 1994 Optical Society of America
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