Crystals of (K, Rb, NH.sub.4)TiO(P, As)O.sub.4 and their use in electrooptic devices
AssigneeE. I. Du Pont de Nemours and Company
InventorsJohn David Bierlein, Thurman Eugene Gier
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Abstract
Crystals of compounds of the type (K, Rb, Tl, NH.sub.4)TiO(P, As)O.sub.4 with the proviso that when NH.sub.4 is present, As is absent, can be grown by hydrothermal methods. The crystals are optically biaxially positive, and piezoelectric and are useful in parametric amplifiers, oscillators, second harmonic generators, modulators and the like.
Claims4
In a nonlinear optical device comprising means to direct at least one incident beam of electromagnetic radiation into a crystal having nonlinear optical properties whereby electromagnetic radiation emerging from said crystal contains at least one frequency different from the frequency of any incident beam of radiation, wherein the improvement comprises a crystal consisting of a compound having the formula
- MTiO(XO.sub.4)
- wherein M is at least one K, Rb, Tl or NH.sub.4 and X is at least one of P or As and wherein X is P when M is NH.sub.4 as said crystal having nonlinear optical properties.
In an electrooptic modulator comprising means to direct a beam of polarized radiation into a birefringent crystal, and means to apply an electric field to said crystal to change birefringence, whereby the polarization of radiation emerging from said crystal is changed, wherein the improvement comprises said crystal consisting of a compound having the formula
- MTiO(XO.sub.4)
- wherein M is at least one of K, Rb, T1 or NH.sub.4 and X is at least one of P or As and wherein X is P when M is NH.sub.4 as said birefringent crystal.
Dependencies are inferred from the claim text.