Accession Number : ADD017302

Title :   Ultraviolet Faraday Rotator Glass.

Descriptive Note : Patent, Filed 28 Apr 93, patented 15 Nov 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Dexter, James L ; Cooper, David G ; Blackburn, Douglas H ; Cranmer, David C ; Kauffman, Dale A

Report Date : 15 Nov 1994

Pagination or Media Count : 9

Abstract : A Faraday rotator glass composition based on a fluoride glass, phosphate glass,fluorophosphate glass or a mixture there of is doped with a lanthanide in a concentration sufficient to provide a Verdet constant above at least 2870 deg/Tesla-meter (1 min/cm Oe)X(1.667 X 10(exp 4)= 1 deg/Tesla-meter and optical transmission above at least 50 percent in a 25 mm thick polished glass sample at least at one wavelength in the 200 to 400 nm wavelength region. The Faraday rotator glass also includes monovalent non-lanthanide cations such as Na, Li, K or mixtures thereof in a concentration sufficient to provide a Verdet constant above at least 2870 deg/Tesla-meter and optical transmission above at least 50 percent in a 25 mm thick polished glass sample at least at one wavelength in the 200 to 400 nm wavelength region. The Faraday rotator glass further includes a concentration of divalent or trivalent non-lanthanide cations such as Mg, Be, Ca, Al or mixtures thereof sufficient to provide surface flatness of at least 1/10 of the operating wavelength at 632.8 nm. (jg)

Descriptors :   *ULTRAVIOLET RADIATION, *GLASS, *FARADAY EFFECT, *ROTATION, *PATENTS, FREQUENCY, MAGNESIUM, CALCIUM, CATIONS, OPTICS, SODIUM, LITHIUM, ALUMINUM, LIGHT TRANSMISSION, DOPING, BERYLLIUM, RARE EARTH ELEMENTS, FLUORIDES, LANTHANUM, POTASSIUM, PHOSPHATES

Subject Categories : Ceramics, Refractories and Glass
      Inorganic Chemistry
      Physical Chemistry
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE