Second-harmonic generation in CDA and CD*A

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
d_{36}(CDA) = d_{36}(CD*A) = (0.96 \pm 0.11) \times 10^{-9}
ESU, which corresponds to
d_{36}(CDA) = d_{36}(CD*A) = 0.92 \times d_{36}(KDP)
. In addition, the temperature variation of the birefringence
d(n_{2}^{e} - n_{1}^{o})/dT
has been measured to be
(8.0 \pm 0.2) \times 10^{-6}\deg
C
^-1
for CDA and
(7.8 \pm 0.2) \times 10^{-6}\deg
C
^-1
for CD*A.