P. Kerkoc et al., 2ND-HARMONIC GENERATION IN BIAXIAL CRYSTALS FOR A NON-DEPLETED FUNDAMENTAL GAUSSIAN LASER-BEAM, Pure and applied optics, 7(3), 1998, pp. 27-32
The theory necessary for the optimization of second-harmonic (SHG) eff
iciency in biaxial crystals is developed and applied to the molecular
crystal (-)2-alpha-(methylbenzylamino)-5-nitropyridine (MBANP). It is
shown that, for the range of crystal lengths and beam walk-off angles
available, the criteria for the selection of the parameters w(0), z(0)
and Delta k for optimization of the second-harmonic signal are the sa
me in biaxial and uniaxial crystals. The maximal possible SHG figure o
f merit, P-2 omega(l)P-omega(2)(0), is found to be 3.7 x 10(-3) W-1 fo
r a 50 mm long crystal.