Abstract:
Polarisierendes Glas (1), das formanisotrope Metallteilchen (3) enthält, die in einem Glasverbund (2) aus zwei Gläsern, die jeweils eine Metallteilchen enthaltende Schicht auf wenigstens einer der Hauptflächen aufweisen, so dass die Orientierungsrichtungen der Metallteilchen miteinander zusammenfallen und die Hauptflächen, die die Metallteilchen enthaltenden Schichten aufweisen, einander gegenüberliegen wobei die formanisotropen Metallteilchen (3) im Glasverbund (2) in einer Richtung orientiert und dispergiert sind und wobei die Konzentration der Metallteilchen eine Verteilung hat, bei der die Konzentration der formanisotropen Metallteilchen (3) in der Nähe einer der Oberflächen des Glasverbunds (2) und in der Nähe der anderen Oberfläche null ist, dann von einer der Oberflächen des Glasverbunds (2) in Bewegungsrichtung des Lichts, auf das eine polarisierende Funktion ausgeübt wird, zu der anderen Oberfläche allmählich zunimmt und in dem Glasverbund (2) innerhalb eines Bereichs der durch Verbinden zweier Gläser bestimmt ist und zu der anderen Oberfläche hin allmählich wieder abnimmt.
Abstract:
A polarizing glass includes shape-anisotropic metal particles oriented and dispersed in a glass substrate, the concentration of the metal particles having a distribution in which in the travel direction of light in which a polarizing function is exhibited, the concentration is substantially zero near one of the surfaces of the glass substrate and near the other surface, gradually increases from one of the surfaces of the glass substrate to the other surface, becomes a value within a predetermined range in the glass substrate, and then gradually decreases toward the other surface.
Abstract:
PROBLEM TO BE SOLVED: To provide a pigtail type optical isolator using a metal particulate-dispersed polarizing glass which achieve isolation of ≥30 dB as a polarizing element. SOLUTION: The pigtail type optical isolator includes at least a first polarizing element, a Farady rotator, and a second polarizing element from the side of a light source. The first and second polarizing elements each includes, in the vicinity of the surface of a base material glass substrate, an acicular metal particulate-dispersed layer in which acicular metal particulates are dispersed in such a manner that the longitudinal direction thereof is aligned with a specified direction. The second polarizing element includes the acicular metal-dispersed layer only in the vicinity of the surface facing the Farady rotator, and the space with the face opposite to an optical fiber includes an acicular metal particulate-absent part in which no acicular metal particulate exist. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a polarization glass, manufactured comparatively simply and having no problem such as surface reflection, an optical isolator and a manufacturing method for polarization glass. SOLUTION: This polarization glass contains shape anisotropic metal particles aligned and dispersed in a glass substrate, and the metal particle concentration has distribution such that in the traveling direction of light showing the polarizing action, it is substantially zero in the vicinity of one side surface of the glass substrate and in the vicinity of the other side surface, it gradually increases as it goes from one side of the glass substrate toward the other side thereof, it falls within a predetermined range in the glass substrate, and then it gradually decreases as it goes toward the other side. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a polarizing element composed of a metal particulate-dispersed type polarizing glass in which isolation of ≥30 dB can be attained even in a pigtail type optical isolator. SOLUTION: A method for obtaining the condition of reduction is disclosed by which a polarizing element produced by reducing a glass substrate in which the acicular particles of silver halide or of first copper are dispersed so as to be oriented to one direction in a reducing atmosphere, thus forming a reduction layer comprising acicular metal silver or copper exhibits an extinction ratio suitable to be used in a pigtail type optical isolator. For each of samples of the polarizing elements obtained by reducing the test samples of a glass substrate under at least two reduction conditions, the distance to a light receiver is set within 100 mm, an extinction ratio is measured with light having a wavelength of 1.3 to 1.6 μm, the polarizing element sample in which the extinction ratio is the maximum or the highest is selected, and a reduction condition under which the selected polarizing element is prepared is determined as reduction condition under which an extinction ratio suitable for a pigtail type light isolator is exhibited. Also a method for producing a polarizing element under the reduction condition obtained by the above method, the polarizing element and an optical isolator are disclosed. COPYRIGHT: (C)2009,JPO&INPIT