Phase-matching crossed-beam geometry

Fig. 1.18 Phase-matching geometries with third-order cascaded signals (4) indicated, (a) Crossed-beam geometry parallel cascade 1 (PI), (b) crossed-beam geometry sequential cascade 2 (S2), (c) Crossed-beam geometry parallel cascade 2 (P2), (d) Crossed-beam geometry sequential cascade 2 (S2), (e) Baseball geometry sequential cascade 1 (SI), (f) Baseball geometry parallel cascade 1 (PI), (g) Baseball geometry sequential cascade 2 (S2), (h) Baseball geometry parallel cascade 2 (P2). The first step in the cascade (a) is represented with solid lines, the second step (b) with dashed lines...

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