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    • 2. 发明授权
    • Directional coupler for coupling single-polarization optical fibers
    • 用于耦合单偏振光纤的定向耦合器
    • US4753497A
    • 1988-06-28
    • US601551
    • 1984-04-18
    • Yoshimasa FujiiYoshinobu MitsuhashiHisato Uetsuka
    • Yoshimasa FujiiYoshinobu MitsuhashiHisato Uetsuka
    • G02B6/28G02B6/26
    • G02B6/2843Y10S359/90
    • A directional coupler for coupling two single-polarization optical fibers each comprising a core, a cladding, and an elliptic jacket having a major axis is made by preparing two quartz substrates each of which is formed with a channel on one major surface; embedding and bonding the jacketed single-polarization optical fibers in the channels in the substrates, respectively, such that the major axis of the elliptic jacket extends perpendicular to the substrate surface; abrading away the substrates together with the fiber embedded therein from the major surface to a depth where light traveling in the core of said fiber may leak out; placing one substrate on the other substrate with the abraded surfaces facing each other; and bonding the substrates to keep the cores in sufficiently close relation to establish evanescent wave coupling therebetween. A stress perpendicular to the major axis is preferably applied to the fiber.
    • 用于耦合两个单极化光纤的定向耦合器,每个单极化光纤包括具有长轴的芯,包层和椭圆形护套,通过制备两个石英基板​​,每个石英基板​​在一个主表面上形成有通道; 将夹套的单偏振光纤分别嵌入和粘合在基板中的通道中,使得椭圆形护套的长轴垂直于基板表面延伸; 将基板与从主表面嵌入其中的纤维一起研磨到其中在所述纤维的芯中行进的光可能泄漏的深度; 将一个基板放置在另一个基板上,其磨损表面彼此面对; 并且将基板粘合以使芯保持足够紧密的关系,以在它们之间建立ev逝波耦合。 垂直于长轴的应力优选地施加到纤维上。
    • 4. 发明授权
    • Polarization-maintaining fiber system and method of manufacturing the
same
    • 保偏光纤系统及其制造方法
    • US4603941A
    • 1986-08-05
    • US535656
    • 1983-09-26
    • Yoshimasa FujiiYoshinobu MitsuhashiOsamu Koike
    • Yoshimasa FujiiYoshinobu MitsuhashiOsamu Koike
    • G01D5/34G01J9/02G02B6/26
    • G01D5/344G01J9/02Y10S359/90
    • In an optical fiber system comprising first and second polarization-maintaining fibers, a first orthogonal coordinate system of the first polarization-maintaining fiber is azimuthally rotated relative to a second orthogonal coordinate system of the second polarization-maintaining fiber by the use of an optical coupler by a preselected angle between 0.degree. and 90.degree., both exclusive. Preferably, the optical coupler is shorter than a beat length of each fiber and the preselected angle is equal to 45.degree.. The optical fiber system is applicable to an optical sensor for sensing a variable physical parameter. In the sensor, a light beam is incident onto one end of the first polarization-maintaining fiber so that a plane of polarization of the light beam is matched to one of those planes of the first polarization-maintaining fiber which are determined by the first orthogonal coordinate system. A third polarization-maintaining fiber is coupled through an additional optical coupler to the second polarization-maintaining fiber. The optical fiber system can be manufactured either by twisting and locally fusing a single polarization-maintaining fiber or by splicing together two polariation-maintaining fibers.
    • 在包括第一和第二偏振保持光纤的光纤系统中,第一偏振保持光纤的第一正交坐标系通过使用光耦合器相对于第二偏振波保持光纤的第二正交坐标系方位角旋转 在0°和90°之间的预选角度,都是排他的。 优选地,光耦合器比每个光纤的拍子长度短,并且预选角度等于45°。 光纤系统适用于用于感测可变物理参数的光学传感器。 在传感器中,光束入射到第一保偏光纤的一端,使得光束的偏振面与第一偏振保持光纤的那些平面中的一个相匹配,这些平面由第一正交 坐标系。 第三偏振保持光纤通过附加光耦合器耦合到第二保偏光纤。 光纤系统可以通过扭转和局部地融合单个偏振保持光纤或通过拼接在一起来制造两个保持维护的光纤。
    • 5. 发明授权
    • Optical branching element
    • 光分支元件
    • US4684208A
    • 1987-08-04
    • US704174
    • 1985-02-22
    • Haruo IshikawaYoshimasa Fujii
    • Haruo IshikawaYoshimasa Fujii
    • G02B6/28G02B27/10
    • G02B6/2817
    • An optical branching element mainly composed of a central linear optical transmission line and a plurality of peripheral linear optical transmission lines. They have circular sections of approximately the same diameters. The peripheral linear optical transmission lines are provided around the central linear optical transmission line such that their end surfaces are arranged on the same plane as the end surface of the central linear optical transmission line. A holder fixes these central and peripheral linear optical transmission lines on the end surface side. Semispheric reflecting concave surfaces having radii larger than the diameters of said peripheral linear optical transmission lines are formed around the contact points of the end surface of the central linear optical transmission line and the end surfaces of the linear optical transmission lines. A reflector which is provided in opposed contact with the contacting surface of the holder incorporates a plurality of semi-spherical reflecting concave surfaces as a reflecting concave surface.
    • 一种主要由中心线性光传输线和多条外围线性光传输线组成的光分路元件。 它们具有大致相同直径的圆形截面。 外围线性光传输线设置在中心线性光传输线周围,使得它们的端面布置在与中心线性光传输线的端表面相同的平面上。 支架将这些中心和外围的线性光传输线固定在端面侧。 在中心线状光传输线的端面和线状光传输线的端面的接触点的周围形成半径大于所述外围线性光传输线的直径的半球反射凹面。 与保持器的接触表面相对地设置的反射器包括多个半球形反射凹面作为反射凹面。