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The crystals exist in the high-temperature α phase and low-temperature β phase, abbreviated as BBO; both phases are birefringent, and BBO is a common nonlinear optical material. Barium borate was discovered and developed by Chen Chuangtian and others of the Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences .
The crystal is important in superconductor research and can allow the replacement of excimer laser with solid-state ones in photolithography used in the semiconductor and the medical industries. [3] Until at least 2009, Chen's laboratory at the Fujian Institute of Research on the Structure of Matter was the only place in the world that could ...
Schematic of SPDC process. Note that conservation laws are with respect to energy and momentum inside the crystal.. Spontaneous parametric down-conversion (also known as SPDC, parametric fluorescence or parametric scattering) is a nonlinear instant optical process that converts one photon of higher energy (namely, a pump photon) into a pair of photons (namely, a signal photon, and an idler ...
BBO may stand for: Barium boron oxide, another name of barium borate; Big Bang Observer, planned space gravitational wave observatory; IATA code for Berbera Airport "BBO (Bad Bitches Only)", a song by Migos from the album Culture II; Beta barium borate (β-BaB 2 O 4) crystal; Bundesbahn Österreich, a former name for the Austrian Federal Railways
Lithium niobate (Li Nb O 3) is a synthetic salt consisting of niobium, lithium, and oxygen.Its single crystals are an important material for optical waveguides, mobile phones, piezoelectric sensors, optical modulators and various other linear and non-linear optical applications. [6]
The material for the crystals is usually a wide-bandgap inorganic crystal, or in some cases a suitable organic polymer. Some popular materials in current use are potassium titanyl phosphate (KTP), lithium niobate, and lithium tantalate. The periodic structure is created in the crystal using a range of techniques.