Figure 1
From: Direct Generation and Detection of Quantum Correlated Photons with 3.2 um Wavelength Spacing
(a) Cross-sectional view of the SPDC and upconversion PPLN waveguide (HC Photonics Corp.), with dimensions (in micron): D = 3.5, T LN = 6.2, W B = 7.8, W T = 11, W C = 16, T SiO2 = 0.7 (b) The measured phase matching profile of the upconversion waveguide (the SPDC waveguide is similar). Blue dots show the experiment results and dashed line is the simulation result of the upconverted optical power plotted against the frequency offset of upconversion pump wavelength (c) The simulated fundamental quasi-TM modes of SPDC and upconversion waveguides for the pump (651.2 nm), signal (779.8 nm) and idler (3950 nm) wavelengths for the waveguide geometry in (a).
