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1. 发明授权

US06876480B2 Farady rotation device and optical device comprising it 失效
标题翻译：法拉第旋转装置和包括它的光学装置
公开(公告)号：US06876480B2
公开(公告)日：2005-04-05
申请号：US10343967
申请日：2001-07-25
申请人： Teruhisa Sahashi , Hidenori Nakada , Hirotaka Kawai , Isao Kojima , Tsugio Tokumasu
发明人： Teruhisa Sahashi , Hidenori Nakada , Hirotaka Kawai , Isao Kojima , Tsugio Tokumasu
IPC分类号： G02F1/09
CPC分类号： G02F1/09 , G02F1/093 , G02F2201/16 , G02F2203/04 , G02F2203/48
摘要： Optical devices including a Faraday rotation devices improved in wavelength and temperature characteristics and an optical attenuator reduced in wavelength dependence and temperature-dependent loss. The Faraday rotation device has permanent magnets magnetized in an axial direction of through-holes, and Faraday elements having a same Faraday rotation direction with respect to a same magnetization direction. The permanent magnets are directed in the same magnetization direction along an optical path, where part of the Faraday elements are accommodated in the through-hole of the permanent magnet, and the remaining Faraday elements are arranged between the magnets, whereby the Faraday elements are to be applied by magnetic fields in opposite directions. For a device variable in Faraday rotation angle, an electromagnet is provided. An input fiber collimator and polarizer are provided on an input side of with the Faraday elements while an analyzer and output fiber collimator are on an output side.
摘要翻译：包括改善波长和温度特性的法拉第旋转装置和光衰减器的光学装置降低了波长依赖性和温度依赖性损失。法拉第旋转装置具有沿通孔的轴向磁化的永久磁体，以及相对于相同磁化方向具有相同的法拉第旋转方向的法拉第元件。永磁体沿着光路相同的磁化方向被引导，其中法拉第元件的一部分被容纳在永磁体的通孔中，并且剩余的法拉第元件被布置在磁体之间，由此法拉第元件将通过相反方向的磁场施加。对于法拉第旋转角度的装置变量，提供电磁体。在法拉第元件的输入侧设置输入光纤准直器和偏振器，而分析器和输出光纤准直器位于输出侧。

2. 发明授权

US07006273B2 Faraday rotation device and optical device using same 有权
标题翻译：法拉第旋转装置和使用其的光学装置
公开(公告)号：US07006273B2
公开(公告)日：2006-02-28
申请号：US11014085
申请日：2004-12-17
申请人： Teruhisa Sahashi , Hidenori Nakada , Hirotaka Kawai , Isao Kojima , Tsugio Tokumasu
发明人： Teruhisa Sahashi , Hidenori Nakada , Hirotaka Kawai , Isao Kojima , Tsugio Tokumasu
IPC分类号： G02F1/09
CPC分类号： G02F1/09 , G02F1/093 , G02F2201/16 , G02F2203/04 , G02F2203/48
摘要： Optical devices including a Faraday rotation devices improved in wavelength and temperature characteristics and an optical attenuator reduced in wavelength dependence and temperature-dependent loss. The Faraday rotation device has permanent magnets magnetized in an axial direction of through-holes, and Faraday elements having a same Faraday rotation direction with respect to a same magnetization direction. The permanent magnets are directed in the same magnetization direction along an optical path, where part of the Faraday elements are accommodated in the through-hole of the permanent magnet, and the remaining Faraday elements are arranged between the magnets, whereby the Faraday elements are to be applied by magnetic fields in opposite directions. For a device variable in Faraday rotation angle, an electromagnet is provided. An input fiber collimator and polarizer are provided on an input side of with the Faraday elements while an analyzer and output fiber collimator are on an output side.
摘要翻译：包括改善波长和温度特性的法拉第旋转装置和光衰减器的光学装置降低了波长依赖性和温度依赖性损失。法拉第旋转装置具有沿通孔的轴向磁化的永久磁体，以及相对于相同磁化方向具有相同的法拉第旋转方向的法拉第元件。永磁体沿着光路相同的磁化方向被引导，其中法拉第元件的一部分被容纳在永磁体的通孔中，并且剩余的法拉第元件被布置在磁体之间，由此法拉第元件将通过相反方向的磁场施加。对于法拉第旋转角度的装置变量，提供电磁体。在法拉第元件的输入侧设置输入光纤准直器和偏振器，而分析器和输出光纤准直器位于输出侧。

3. 发明授权

US5105307A Optical isolator 失效
标题翻译：光隔离器
公开(公告)号：US5105307A
公开(公告)日：1992-04-14
申请号：US431180
申请日：1989-11-03
申请人： Yuko Nishiyama , Tsugio Tokumasu
发明人： Yuko Nishiyama , Tsugio Tokumasu
IPC分类号： G02B27/28 , G02F1/09
CPC分类号： G02F1/093 , G02F2201/16 , Y10S372/703
摘要： A two-stage type optical isolator comprising two isolator units connected in series, each isolator unit having a combination of a Faraday rotator, a permanent magnet and polarizers on both sides of the Faraday rotator, the two Faraday rotators and polarizers of the units having incidence/exit surfaces having directions of normals inclined relative to the direction of optical axis, and wherein an optical axis of the incident light is aligned with an optical axis of the exit light.
摘要翻译：两级隔离器包括串联连接的两个隔离器单元，每个隔离器单元具有法拉第转子，永磁体和法拉第转子两侧的偏振器的组合，两个法拉第旋转器和具有入射角的单元的偏振器 /出射表面，其具有相对于光轴方向倾斜的法线方向，并且其中入射光的光轴与出射光的光轴对准。

4. 发明授权

US07280264B2 Magneto-optical device 有权
公开(公告)号：US07280264B2
公开(公告)日：2007-10-09
申请号：US10569097
申请日：2004-08-26
申请人： Yuji Goto , Mikio Kitaoka , Hiromitsu Umezawa , Tsugio Tokumasu , Toshihiko Watanabe , Akitoshi Mesaki , Takashi Kato , Masaharu Hoshikawa , Chiharu Nishida
发明人： Yuji Goto , Mikio Kitaoka , Hiromitsu Umezawa , Tsugio Tokumasu , Toshihiko Watanabe , Akitoshi Mesaki , Takashi Kato , Masaharu Hoshikawa , Chiharu Nishida
IPC分类号： G02F1/09
CPC分类号： G02F1/09 , G02F1/093
摘要： It is possible to reduce the size of a magneto-optical device, increase the speed of optical control, simplify power supply structure and its control, and maintain a Faraday rotation angle in an arbitrary state even after shut-off of the excitation current. The magneto-optical device includes a magnetic yoke (10) made of a high-permeability magnetic material, the magnetic yoke including a tabular portion (16) and four pillar portions (18) protruding from one side of the tabular portion (16), a coil (12) wound on each of the pillar portions, and a magneto-optical element (14) arranged in an open-magnetic-circuit region surrounded by the end portions of the four pillar portions. A magnetic field obtained by a coil is applied to the magneto-optical element.

5. 发明授权

US07050232B2 Optical circulator and optical switch 有权
标题翻译：光环行器和光开关
公开(公告)号：US07050232B2
公开(公告)日：2006-05-23
申请号：US10381474
申请日：2001-10-01
申请人： Shusuke Wada , Shohei Abe , Tomokazu Imura , Hiroaki Ono , Tsugio Tokumasu
发明人： Shusuke Wada , Shohei Abe , Tomokazu Imura , Hiroaki Ono , Tsugio Tokumasu
IPC分类号： G02B27/28 , G02B5/30
CPC分类号： G02F1/093 , G02B5/3083 , G02B6/2746 , G02B27/28 , G02F1/31 , Y10S372/703
摘要： A first separating/combining birefringent element 10, first and second optical-path controlling birefringent elements 11, 12, and a second separating/combining birefringent element 13 are spaced apart. Between the first separating/combining birefringent element and the first optical-path controlling birefringent element, a first polarization rotating means 14 is arranged for changing a polarization direction from an orthogonal relationship to a parallel relationship, or from a parallel relationship to an orthogonal relationship. Also, between the second optical-path controlling birefringent element and the second separating/combining birefringent element, a second polarization rotating means 17 is arranged. The first and second optical-path controlling birefringent elements are oppositely arranged symmetrically on optical axis about an arrangement center thereof, between which is arranged a ½-wavelength plate for rotating a polarization direction of a light on a central optical path 90 degrees, thereby structuring an optical circulator. With a similar structure, an optical switch can be structured by using a ±45-degree variable Faraday rotator in the first and second polarization rotation switch means.
摘要翻译：第一分离/组合双折射元件10，第一和第二光路控制双折射元件11,12和第二分离/组合双折射元件13间隔开。在第一分离/组合双折射元件和第一光路控制双折射元件之间，设置第一偏振旋转装置14，用于将偏振方向从正交关系改变为平行关系，或者从平行关系改变为正交关系。此外，在第二光路控制双折射元件和第二分离/组合双折射元件之间，布置有第二偏振旋转装置17。第一和第二光路控制双折射元件围绕其布置中心在光轴上对称地布置，其间布置有1/2波长板，用于将中心光路上的光的偏振方向旋转90度，从而构造光环行器。具有类似的结构，可以通过在第一和第二偏振旋转开关装置中使用±45度的可变法拉第旋转器来构造光学开关。

6. 发明授权

US07050216B2 Variable optical filter 有权
标题翻译：可变光学滤波器
公开(公告)号：US07050216B2
公开(公告)日：2006-05-23
申请号：US11009991
申请日：2004-12-10
申请人： Nobuhiro Fukushima , Hidenori Nakada , Tsugio Tokumasu , Yuko Ota
发明人： Nobuhiro Fukushima , Hidenori Nakada , Tsugio Tokumasu , Yuko Ota
IPC分类号： G02F1/09
CPC分类号： G02F1/09 , G02F2203/055
摘要： A variable optical filter comprises a first polarizer, a first phase difference element operable to generate a phase difference, a variable Faraday rotator operable to impart a variable Faraday rotation, a second phase difference element operable to generate a phase difference, and a second polarizer, wherein said polarizers, said variable Faraday rotator, and said phase difference elements are arranged in the mentioned order along the optical axis, and wherein when the angles formed by the optic axes of said first and second phase difference elements and the transmitted polarization azimuth of the first polarizer are assumed respectively to be φ1 and φ2, these φ1 and φ2 are set to different angles.
摘要翻译：可变光学滤波器包括第一偏振器，可操作以产生相位差的第一相位差元件，可操作以赋予可变法拉第旋转的可变法拉第旋转器，可操作以产生相位差的第二相位差元件和第二偏振器，其中所述偏振器，所述可变法拉第旋转器和所述相位差元件沿着光轴以所述次序布置，并且其中当由所述第一和第二相位差元件的光轴和所述第一和第二相位差元件的透射偏振方位角形成的角度假设第一偏振器分别被假设为phi1和φ2，这些phi1＆lt; 1＆lt; 2＆gt;和＆lt; 2＆gt;被设置为不同角度

7. 发明申请

US20070002425A1 Magneto-optical device 有权
标题翻译：磁光装置
公开(公告)号：US20070002425A1
公开(公告)日：2007-01-04
申请号：US10569097
申请日：2004-08-26
申请人： Yuji Goto , Mikio Kitaoka , Hiromitsu Umezawa , Tsugio Tokumasu , Toshihiko Watanabe , Akitoshi Mesaki , Takashi Kato , Masaharu Hoshikawa , Chiharu Nishida
发明人： Yuji Goto , Mikio Kitaoka , Hiromitsu Umezawa , Tsugio Tokumasu , Toshihiko Watanabe , Akitoshi Mesaki , Takashi Kato , Masaharu Hoshikawa , Chiharu Nishida
IPC分类号： G02F1/09
CPC分类号： G02F1/09 , G02F1/093
摘要： It is possible to reduce the size of a magneto-optical device, increase the speed of optical control, simplify power supply structure and its control, and maintain a Faraday rotation angle in an arbitrary state even after shut-off of the excitation current. The magneto-optical device includes a magnetic yoke (10) made of a high-permeability magnetic material, the magnetic yoke including a tabular portion (16) and four pillar portions (18) protruding from one side of the tabular portion (16), a coil (12) wound on each of the pillar portions, and a magneto-optical element (14) arranged in an open-magnetic-circuit region surrounded by the end portions of the four pillar portions. A magnetic field obtained by a coil is applied to the magneto-optical element.
摘要翻译：即使关闭励磁电流，也可以减小磁光装置的尺寸，提高光控制的速度，简化电源结构及其控制，并将法拉第旋转角保持在任意状态。磁光装置包括由高磁导率磁性材料制成的磁轭（10），磁轭包括平板状部分（16）和从平板状部分（16）的一侧突出的四个柱部分（18）卷绕在每个柱部上的线圈（12）和布置在由四个柱部分的端部包围的开放磁路区域中的磁光元件（14）。通过线圈获得的磁场被施加到磁光元件。

8. 发明申请

US20050141075A1 Faraday rotation device and optical device using same 有权
标题翻译：法拉第旋转装置和使用其的光学装置
公开(公告)号：US20050141075A1
公开(公告)日：2005-06-30
申请号：US11014085
申请日：2004-12-17
申请人： Teruhisa Sahashi , Hidenori Nakada , Hirotaka Kawai , Isao Kojima , Tsugio Tokumasu
发明人： Teruhisa Sahashi , Hidenori Nakada , Hirotaka Kawai , Isao Kojima , Tsugio Tokumasu
IPC分类号： G02F1/09
CPC分类号： G02F1/09 , G02F1/093 , G02F2201/16 , G02F2203/04 , G02F2203/48
摘要： Optical devices including a Faraday rotation devices improved in wavelength and temperature characteristics and an optical attenuator reduced in wavelength dependence and temperature-dependent loss. The Faraday rotation device has permanent magnets magnetized in an axial direction of through-holes, and Faraday elements having a same Faraday rotation direction with respect to a same magnetization direction. The permanent magnets are directed in the same magnetization direction along an optical path, where part of the Faraday elements are accommodated in the through-hole of the permanent magnet, and the remaining Faraday elements are arranged between the magnets, whereby the Faraday elements are to be applied by magnetic fields in opposite directions. For a device variable in Faraday rotation angle, an electromagnet is provided. An input fiber collimator and polarizer are provided on an input side of with the Faraday elements while an analyzer and output fiber collimator are on an output side.
摘要翻译：包括改善波长和温度特性的法拉第旋转装置和光衰减器的光学装置降低了波长依赖性和温度依赖性损失。法拉第旋转装置具有沿通孔的轴向磁化的永久磁体，以及相对于相同磁化方向具有相同的法拉第旋转方向的法拉第元件。永磁体沿着光路相同的磁化方向被引导，其中法拉第元件的一部分被容纳在永磁体的通孔中，并且剩余的法拉第元件被布置在磁体之间，由此法拉第元件将通过相反方向的磁场施加。对于法拉第旋转角度的装置变量，提供电磁体。在法拉第元件的输入侧设置输入光纤准直器和偏振器，而分析器和输出光纤准直器位于输出侧。

9. 发明申请

US20050134954A1 Variable optical filter 有权
标题翻译：可变光学滤波器
公开(公告)号：US20050134954A1
公开(公告)日：2005-06-23
申请号：US11009991
申请日：2004-12-10
申请人： Nobuhiro Fukushima , Hidenori Nakada , Tsugio Tokumasu , Yuko Ota
发明人： Nobuhiro Fukushima , Hidenori Nakada , Tsugio Tokumasu , Yuko Ota
IPC分类号： G02B5/30 , G02B27/28 , G02F1/09
CPC分类号： G02F1/09 , G02F2203/055
摘要： A variable optical filter comprises a first polarizer, a first phase difference element operable to generate a phase difference, a variable Faraday rotator operable to impart a variable Faraday rotation, a second phase difference element operable to generate a phase difference, and a second polarizer, wherein said polarizers, said variable Faraday rotator, and said phase difference elements are arranged in the mentioned order along the optical axis, and wherein when the angles formed by the optic axes of said first and second phase difference elements and the transmitted polarization azimuth of the first polarizer are assumed respectively to be φ1 and φ2, these φ1 and φ2 are set to different angles.
摘要翻译：可变光学滤波器包括第一偏振器，可操作以产生相位差的第一相位差元件，可操作以赋予可变法拉第旋转的可变法拉第旋转器，可操作以产生相位差的第二相位差元件和第二偏振器，其中所述偏振器，所述可变法拉第旋转器和所述相位差元件沿着光轴以所述次序布置，并且其中当由所述第一和第二相位差元件的光轴和所述第一和第二相位差元件的透射偏振方位角形成的角度假设第一偏振器分别被假设为phi1和φ2，这些phi1＆lt; 1＆lt; 2＆gt;和＆lt; 2＆gt;被设置为不同角度

10. 发明授权

US5521741A Polarization plane switch and optical switching device using the same 失效
标题翻译：极化平面开关和光开关器件使用相同
公开(公告)号：US5521741A
公开(公告)日：1996-05-28
申请号：US427184
申请日：1995-04-21
申请人： Hiromitsu Umezawa , Yoichi Suzuki , Tomokazu Imura , Tsugio Tokumasu , Hiroshi Rikukawa
发明人： Hiromitsu Umezawa , Yoichi Suzuki , Tomokazu Imura , Tsugio Tokumasu , Hiroshi Rikukawa
IPC分类号： G02F1/09 , G02F1/03
CPC分类号： G02F1/093
摘要： A polarization plane switch comprising a Faraday rotator made of an iron-containing garnet single-crystal film and magnetic field applying devices capable of reversing a magnetic field to be applied to the Faraday rotator. The polarization plane switch has a structure in which magnetization of part of the Faraday rotator is unsaturated and that of the remaining portion of it is saturated when a magnetic field is applied to the Faraday rotator by the magnetic field applying device, and a light beam passes through the magnetically saturated portion almost vertically to the film surface. As the above Faraday rotator, it is the most preferable to use a Faraday rotator made of Bi-substituted iron garnet single crystal formed by liquid-phase epitaxy and having a compensation temperature, and thermally treated under the top condition at a temperature between 1,120.degree. and 1,180.degree. C. for 7 hours or less.
摘要翻译：包括由含铁石榴石单晶膜制成的法拉第旋转器的偏振平面开关和能够反转施加到法拉第旋转器的磁场的磁场施加装置。偏振平面开关具有这样一种结构，其中当通过磁场施加装置向法拉第转子施加磁场时，法拉第转子的一部分的磁化是不饱和的，剩余部分的磁化饱和，并且光束通过通过磁性饱和部分几乎垂直于膜表面。作为上述法拉第旋转器，最优选使用由液相外延形成的具有补偿温度的双取代铁石榴石单晶制成的法拉第旋转器，并在顶部条件下在1120℃的温度下进行热处理和1,180℃下干燥7小时以上。

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