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    • 1. 发明授权
    • Ultraviolet Faraday rotator glass
    • 紫外法拉第旋转玻璃
    • US5364819A
    • 1994-11-15
    • US53287
    • 1993-04-28
    • James L. DexterDavid G. CooperDouglas H. BlackburnDavid C. CranmerDale A. Kauffman
    • James L. DexterDavid G. CooperDouglas H. BlackburnDavid C. CranmerDale A. Kauffman
    • C03C3/247C03C3/32C03C4/00G02F1/00
    • G02F1/0036C03C3/247C03C3/325C03C4/00Y10S501/90Y10S501/905
    • A Faraday rotator glass composition based on a fluoride glass, phosphate glass, fluorophosphate glass or a mixture thereof 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).times.(1.667.times.10.sup.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.
    • 基于氟化物玻璃,磷酸盐玻璃,氟磷酸盐玻璃或其混合物的法拉第旋转玻璃组合物掺杂有镧系元素,其浓度足以提供至少2870度/特斯拉米[(1分钟/厘米2) Oe)×(1.667×104)= 1度/特斯拉计],并且在200nm至400nm波长区域中的至少一个波长的25mm厚的抛光玻璃样品中的至少50%的光学透射率。 法拉第旋转器玻璃还包括一定浓度的单价非镧系元素阳离子,例如Na,Li,K或其混合物,其浓度足以提供高于至少2870度/特斯拉计的维尔德恒定,并且在25以上的光透射率至少为50% 至少在200至400nm波长区域中的一个波长处的mm厚的抛光玻璃样品。 法拉第旋转玻璃还包括二价或三价非镧系元素阳离子如Mg,Be,Ca,Al或其混合物的浓度,其足以提供在632.8nm处至少1/10的工作波长的表面平坦度。