Passive Q-Switching has advantages of passive (no necessary for the input power), compact, low cost and
easy to manufacture and operate. Cr:YAG is an excellent passive Q-switch crystals for Nd and Yb doped
laser whose wavelength is in the range of 900-1200 nm, especially for the diode pumped or lamp pumped
Nd:YAG, Nd:YLF and Yb:YAG. Due to Cr:YAG has chemically stable, durable, UV resistant, good thermal
conductivity and high damage threshold (> 500 MW/cm^), it will replace traditional materials, such as, LiF,organic Dye and color centers for passive Q-switching application.