Efficient second-harmonic generation at 5321 Å has been achieved in CDA and CD*A. At 50-MW pump power, loss-free peak power-conversion efficiency of 57 percent and 45 percent were obtained in CDA and CD*A, respectively, The nonlinear optical constant, corrected for multimode fluctuations, was found to be

ESU, which corresponds to

. In addition, the temperature variation of the birefringence

has been measured to be

C
-1for CDA and

C
-1for CD*A.