Fig. 1. (Color online) (a) Layout of experimental setup. λ1=800  nm, λ2=1000–1600  nm. (b) Theoretical curves of the wave vector relationship of the interaction beams, where the incidences are both set to ordinary polarized, and the SFG is extraordinary polarized.

Fig. 2. (Color online) (a) Patterns on the screen by adjusting the wavelength of F2 from 1240 to 1320 nm. (b) The phase-matching diagram of the conical SH beam.

Fig. 3. (Color online) (a) Conical SFG patterns with the wavelength of incidence F2 from 1420 to 1560 nm. (b) Diagram of complete phase-matching condition of conical SFG. (c) The internal emission angles α and β as a function of the pump wavelength.

Fig. 4. (Color online) (a) Enhanced SFG patterns at the wavelength of incidence F2 of 1480 nm; the photograph below is the phase-matching SFG at two tangent points (see Visualization 1). (b) Diagram of phase-matching condition at the situation where the two SF rings are tangent. (c) Scheme of complete phase-matching by total reflection under the anomalous-like dispersion condition.

Fig. 5. (Color online) (a) External incident angle depending on the pump wavelength at the phase-matching condition. (b) Measured pump power from 1420 to 1480 nm; the red rhombuses are relative conversion efficiency calculated based on the power of the pump wave and the SFG.