1️⃣ Initialize Device
2️⃣ Program QPM Grating
3️⃣ Simulate Second Harmonic Generation
4️⃣ Wavelength Scan (Phase-Matching Characterization)
Scan pump wavelength to find optimal phase-matching (Nature Fig. 2b)
5️⃣ Real-Time Feedback Optimization
Dithering algorithm to auto-optimize grating period (Nature Fig. 2c)
6️⃣ Pulsed Propagation with Dispersion
60-fs pulses with GVM = -92 fs/mm temporal walk-off
7️⃣ Spatio-Spectral Engineering
Simultaneous spatial and spectral control (Nature Fig. 5)
8️⃣ Channel Waveguide: 40× Efficiency
Tight mode confinement vs planar waveguide (Extended Data Fig. 2-3)
9️⃣ Device Physics & Material Properties
AC bias, photoconductive dynamics, wavelength-dependent loss