If you are looking for a , keep these tips in mind:
Nonlinear optical crystals are materials that exhibit nonlinear optical properties, such as second-harmonic generation (SHG), third-harmonic generation (THG), and four-wave mixing (FWM). These crystals have a non-centrosymmetric crystal structure, which allows for the existence of nonlinear optical susceptibilities. Some common nonlinear optical crystals include: crystal nonlinear optics with snlo examples pdf
: