Fig. 1. Schematic diagram of the noncollinear phase matching setup.

Fig. 2. Phase matching schematic of the TPM condition (solid line) and walk-off compensation condition (dotted line).

Fig. 3. Schematic diagram of the experimental setup.

Fig. 4. (a) Pulse temporal profile of the 355 nm laser; (b) spot size of the 355 nm beam at the position of the BBO crystal.

Fig. 5. Pulse temporal profile of the signal output at 500 nm.

Fig. 6. Signal linewidth and conversion efficiency varying with wavelength at α₁ =1.6° and α₂ = 4.8°.

Fig. 7. Widely tunable signal laser outputs vary with different non-collinearity angles.

Fig. 8. Beam profile of the signal output at 500 nm.