FIG. 1. Schematic of the experimental setup (a), and polarization configurations (b): (i) type-0 SHG, (ii) type-1 SHG, (iii) type-0 SPDC and (iv) type-1 SPDC. Gray arrows: propagation direction along x-axis, blue arrows and crossed circles: polarization directions.
FIG. 2. SHG power versus temperature for type-0 pumped at 990.6 nm (left) and type-1 pumped at 970.8 nm (right). Open triangles: type-0 data, open squares: type-1 data, dots: Type-0 (red), Type-1 (blue) QPM bands calculated based on Sellmeier equations [15] for fifteen different wavelengths within each input fundamental band.
FIG. 3. Type-0 QPM SPDC spectrum pumped at 495.3 nm, 53℃ (a), and type-1 QPM SPDC spectrum pumped at 485.4 nm, 122℃ (b). Open triangles: data. Dots: QPM bands calculated based on Sellmeier equations [15] for thirty different wavelengths within the input fundamental bands. The cut-off of Si-APD starts from ~1050 nm.
TABLE 2. Parameters used in the estimation of (d33/d31)-ratio from the measured SPDC output
TABLE 1. Parameters used in the estimation of (d33/d31)-ratio from the measured SHG output
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