4.5 Achievement of Phase Matching
99
Fig. 4.8 Index ellipsoid of positive uniaxial crystals
Fig. 4.9 An ellipse
fundamental frequency will be n o and for the second-harmonic frequency will be
n(θ) depending on the angle (θ) between the velocity vector and the optics axis. We
know that for = 0 in case of second-harmonic generation
n(ω) = n(2ω)
(4.78)
which implies that
99
Fig. 4.8 Index ellipsoid of positive uniaxial crystals
Fig. 4.9 An ellipse
fundamental frequency will be n o and for the second-harmonic frequency will be
n(θ) depending on the angle (θ) between the velocity vector and the optics axis. We
know that for = 0 in case of second-harmonic generation
n(ω) = n(2ω)
(4.78)
which implies that