SUBSTANCE FOR THE ACTIVE LIGHT-CONTROLLED OPTICAL SHUTTER OF THE ULTRAVIOLET RANGE OF THE SPECTRUM Russian patent published in 2018 - IPC G02F1/355 H01S4/00 

FIELD: optics.

SUBSTANCE: invention relates to nonlinear optics, namely to optical materials having the ability to change the transmittance of ultraviolet radiation when the control radiation is applied to them. Substance for active light-controlled optical closures based on a crystal with an admixture of neodymium ions as a base contains either calcium fluoride with a uniformly distributed impurity volume of neodymium ions Nd³⁺ with a concentration of not more than 1 at. %, or strontium fluoride with a uniformly distributed impurity volume of neodymium ions Nd³⁺ with a concentration of not more than 1 at. %, or a two-component solid solution of sodium fluoride and yttrium fluoride with the general formula Na_0.4Y_0.6F_2.2 with a uniformly distributed in volume admixture of neodymium ions Nd³⁺ with a concentration of not more than 5 at%, or a two-component solid solution of potassium fluoride and yttrium fluoride with the general formula KY₃F₁₀ with a uniformly distributed in volume admixture of neodymium ions Nd³⁺ with a concentration of not more than 5 at. %.

EFFECT: shortening working wavelength of radiation, which is locked by the shutter material.

4 cl, 3 dwg