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  2. Barium borate - Wikipedia

    en.wikipedia.org/wiki/Barium_borate

    Barium borate is an inorganic compound, a borate of barium with a chemical formula BaB 2 O 4 or Ba(BO 2) 2. It is available as a hydrate or dehydrated form, as white powder or colorless crystals. 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 ...

  3. Spontaneous parametric down-conversion - Wikipedia

    en.wikipedia.org/wiki/Spontaneous_parametric...

    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 ...

  4. Quantum eraser experiment - Wikipedia

    en.wikipedia.org/wiki/Quantum_eraser_experiment

    First, a photon is shot through a specialized nonlinear optical device: a beta barium borate (BBO) crystal. [3] This crystal converts the single photon into two entangled photons of lower frequency, a process known as spontaneous parametric down-conversion (SPDC). These entangled photons follow separate paths.

  5. Delayed-choice quantum eraser - Wikipedia

    en.wikipedia.org/wiki/Delayed-choice_quantum_eraser

    This is done by a nonlinear optical crystal BBO (beta barium borate) that converts the photon (from either slit) into two identical, orthogonally polarized entangled photons with 1/2 the frequency of the original photon.

  6. Pockels effect - Wikipedia

    en.wikipedia.org/wiki/Pockels_effect

    The Pockels effect occurs in crystals that lack inversion symmetry, such as monopotassium phosphate (KH 2 PO 4, abbr. KDP), potassium dideuterium phosphate (KD 2 PO 4, abbr. KD*P or DKDP), lithium niobate (LiNbO 3), beta-barium borate (BBO), barium titanate (BTO) and in other non-centrosymmetric media such as electric-field poled polymers or ...

  7. Woman takes down US flag, replaces it with Mexican flag at ...

    www.aol.com/news/woman-takes-down-us-flag...

    Crystal Aguilar, 24, was arrested Thursday for allegedly taking down an American flag from a flagpole at a California park and replacing it with a Mexican flag. "Touch me, motherf-----, and when ...

  8. Diode-pumped solid-state laser - Wikipedia

    en.wikipedia.org/wiki/Diode-pumped_solid-state_laser

    Blue DPSSLs use a nearly identical process, except that the 808 nm light is being converted by an Nd:YAG crystal to 946 nm light (selecting this non-principal spectral line of neodymium in the same Nd-doped crystals), which is then frequency-doubled to 473 nm by a beta barium borate (BBO) crystal or LBO crystal. Because of the lower gain for ...

  9. People are eating borax. Why? Here's what experts say ... - AOL

    www.aol.com/lifestyle/people-eating-borax-why...

    People are ingesting borax. Also known by its chemical name sodium borate decahydrate, borax is a salt typically used to kill ants and boost laundry detergent, among other household cleaning needs ...