A nonlinear optical crystal is a crystal that shows more than twice the nonlinear optical effect for a laser strong electric field. Nonlinear optical crystal is a kind of functional material. The frequency doubling (or "frequency conversion") crystal can be used to convert the laser wavelength, so as to expand the tunable range of the laser. It has important application value in the field of laser technology.
Crystals with nonlinear optical effects. In a broad sense, it refers to a crystal that can produce nonlinear optical effects under the action of strong light or an external field. Nonlinear optical crystals are usually produced under the action of strong light; Electro-optic, magneto-optic and acoustooptic crystals are produced under the action of the external field. In addition, there are crystals or polymers composed of organic molecules containing conjugated systems. KH2PO4 (KDP), NH4H2PO4 (ADP) and csh2a5o4 (CDA) are widely used; KTiOPO4、KNbO3、NiNbO3、 Ba2NaNb5O15； BaB2O4(BBO)、LiB3O5(LBO)、NaNO2； GaAs, InSb, InAs, ZnS, etc. According to the state, it is divided into block, film, fiber, and liquid crystal. Frequency doubling, mixing, parametric oscillation, optical parametric amplification, and other frequency conversion technologies generated by the second-order nonlinear effect can broaden the wavelength range of laser. It has been applied to nuclear fusion, medical treatment, underwater photography, optical communication, optical ranging and so on.
Crystals with nonlinear optical effects. In a broad sense, it refers to a crystal that can produce nonlinear optical effects under the action of strong light or an external field. Nonlinear optical crystals are usually produced under the action of strong light; Electro-optic, magneto-optic and acoustooptic crystals are produced under the action of the external field. In addition, there are crystals or polymers composed of organic molecules containing conjugated systems. KH2PO4 (KDP), NH4H2PO4 (ADP) and csh2a5o4 (CDA) are widely used; KTiOPO4、KNbO3、NiNbO3、 Ba2NaNb5O15； BaB2O4(BBO)、LiB3O5(LBO)、NaNO2； GaAs, InSb, InAs, ZnS, etc. According to the state, it is divided into block, film, fiber, and liquid crystal. Frequency doubling, mixing, parametric oscillation, optical parametric amplification, and other frequency conversion technologies generated by the second-order nonlinear effect can broaden the wavelength range of laser. It has been applied to nuclear fusion, medical treatment, underwater photography, optical communication, optical ranging and so on.
Nonlinear Crystal
