Example One:

Standard 1.5-meter Ti:Sa laser cavity, which is widely used in Kerr-Lensing Mode-locked femtosecond Ti:Sapphire laser cavity. The Ti:Sapphire crystal is 20mm long with Brewster angle cut. The two inner cavity curved mirrors are tilted 15 degree in the horizontal incident plane.

Example two:

Simple diode-pumped Nd:YAG cavity. The crystal is 60mm long and modeled as an f=500mm Gaussian Duct.

Example three:

Diode-end-pumped Nd:YVO4 ring cavity, which is similar to Coherent Verdi DPSS green laser. The beam size in the second-harmonic crystal is about 100um (necessary for high SHG conversion efficiency), which is marked by the beam checker. OC is select as element No.1