Dual wavelength waveplate e sebelisoa haholo tsamaisong ea Third Harmonic Generation (THG).Ha o hloka kristale ea NLO bakeng sa mofuta oa II SHG (o+e→e), le kristale ea NLO bakeng sa mofuta oa II THG (o+e→e), polarization e tsoang ho SHG e ke ke ea sebelisoa bakeng sa THG.Kahoo o tlameha ho fetola polarization ho fumana polarization tse peli tsa perpendicular bakeng sa mofuta oa II THG.Dual wavelength waveplate e sebetsa joalo ka rotator e polarizing, e ka potoloha polarization ea lehlakore le le leng ebe e lula e le polarization ea beam e 'ngoe.