Two figures of merit, the threshold power (Pth) and the limiting volume (Vmin) can be used to compare the relative efficiency and economy of new harmonic generating crystals. The properties of barium metaborate and L-Arginine phosphate are used to illustrate the effect of nonlinearity, birefringence, and damage threshold on these figures of merit.
Stephan P Velsko,
"Nonlinear Materials For Frequency Conversion", Proc. SPIE 0895, Laser Optics for Intracavity and Extracavity Applications, (27 June 1988); doi: 10.1117/12.944439; https://doi.org/10.1117/12.944439