Nearly noncritically phase-matched UV generation at 3547 Å in NaCHO2

Sodium formate (NaCHO
2
) has been found to be very nearly noncritically phase matchable for type-2 frequency mixing of the Nd:YAG laser fundamental and second-harmonic radiation at room temperature. The nonlinear optical constant was determined to be d
32
(NaCHO
2
) =
(1.25 \pm 0.25) \times 10^{-9}
ESU.