Observation of Solc-like filter in periodically poled lithium niobate

The first observation is reported of a Solc-like filter in periodically poled lithium niobate, a device with outstanding nonlinear optical properties. Using the so called quasiphase-matching (QPM) technique, which has many advantages compared to conventional birefringence phase matching, enhancement of conversion efficiency was obtained in optical second harmonic generation (SHG) and other nonlinear optical processes.