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AssigneeOwens-Illinois, Inc.
InventorsHaynes A. Lee, Jr., Charles F. Rapp
Estimating the term…
There is disclosed a Faraday rotator device suitable for radiation phase shifters, isolators and shutters, that operate in the visible and infrared regions of the electromagnetic spectrum. The device includes (1) means for supplying polarized, electromagnetic radiation, (2) a lithia-silica-terbia glass article capable of effecting Faraday rotation when subjected to a magnetic field, and (3) means for inducing a magnetic field within the glass article, the glass generally comprising about 61-80 mole percent SiO.sub.2, 15-27.5 mole percent Li.sub.2 O, 3-9 mole percent Tb.sub.2 O.sub.3, and optionally, up to about 3 mole percent of R.sub.2 O.sub.3, such as Al.sub.2 O.sub.3 or B.sub.2 O.sub.3 --and optionally, minor amounts of Na.sub.2 O, K.sub.2 O or CaO, providing the sum of Li.sub.2 O + Na.sub.2 O + K.sub.2 O + CaO is not substantially greater than about 32.5 mole percent.
A Faraday rotator device comprising
A method for effecting Faraday rotation of polarized electromagnetic radiation in a glass article, the method including the steps of
The new use for a glass article in which the glass has a composition approximately as follows:
A Faraday rotator device comprising a source of light for providing a monochromatic light beam, light polarizing means for polarizing the monochromatic light beam to provide a monochromatic polarized light beam, a glass article capable of effecting Faraday rotation of the monochromatic polarized light beam when subjected to a magnetic field, and magnetic means for inducing a magnetic field for rotating the polarized monochromatic light beam within the glass article, said glass article having a high Verdet constant, good light transmission, good melt properties, high damage threshold, good forming properties including a relatively wide working temperature at approximately log 4 viscosity, being relatively seed-free and being easily homogenized, the glass having a composition approximately as follows
Dependencies are inferred from the claim text.