Ka otu afọ nke ịrụsi ọrụ ike gasịrị, anyị etoolakristal gasena ezigbo mma ọma.
Teknụzụ anyị nwere ike inyeGaSekristal nwere nnukwu oghere na ọkpụrụkpụ dị mkpa.
Gallium Selenide (GaSe) otu kristal anya na-abụghị nke linear, na-ejikọta ọnụ ọgụgụ buru ibu na-abụghị nke linear, ọnụ ụzọ mmebi dị elu na oke nghọta.Ọ bụ ihe dị mma maka SHG na etiti IR.Njirimara ugboro-abụọ nkeGaSeA mụrụ ya n'ogo ogologo n'etiti 6.0 µm na 12.0 µm.GaSeejirila nke ọma mee ihe maka SHG nke CO2 laser nke ọma (ruo ngbanwe 9%);maka SHG nke pulsed CO, CO2 na chemical DF-laser (l = 2.36 µm) radieshon;mgbanwe nke CO na CO2 laser radieshon n'ime ihe a na-ahụ anya;Ọgbọ infrared site na ngwakọta ugboro ugboro nke Neodymium na laser dye infrared ma ọ bụ (F-) -ụkpụrụ laser etiti;Ọgbọ ọkụ OPG n'ime 3.5-18 µm;terahertz (T-ray) ọgbọ radieshon.Ọ bụ ihe na-agaghị ekwe omume igbutu kristal maka akụkụ ụfọdụ dabara na akụkụ n'ihi nhazi ihe (cleave along (001) ụgbọelu) na-amachi mpaghara ngwa.