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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。

4. 发明授权

US07024073B2 Reflective variable light attenuator 失效
标题翻译：反光可变光衰减器
公开(公告)号：US07024073B2
公开(公告)日：2006-04-04
申请号：US10490689
申请日：2002-09-20
申请人： Teruhisa Sahashi , Hidenori Nakada , Shohei Abe , Isao Kojima , Keisuke Ikeda
发明人： Teruhisa Sahashi , Hidenori Nakada , Shohei Abe , Isao Kojima , Keisuke Ikeda
IPC分类号： G02B6/26 , G02B6/42 , G02B6/32 , G02F1/09 , G02F1/00
CPC分类号： G02F1/09 , G02F2203/02 , G02F2203/48
摘要： A reflection-type variable optical attenuator comprises: a main attenuator unit including a first birefringent crystal plate, a Faraday rotational angle varying unit, and a second birefringent crystal plate arranged in this order; an input port and an output port that are arranged on a side of one end of the main attenuator unit; and a two-point reflection-type optical path varying reflector that is arranged on a side of the other end of the main attenuator unit. Light that comes in from the input port makes a round trip in the main attenuator unit and goes out through the output port.
摘要翻译：反射型可变光衰减器包括：主衰减器单元，其包括第一双折射晶体板，法拉第旋转角度变化单元和第二双折射晶体板，其依次排列; 输入端口和输出端口，其布置在主衰减器单元的一端的一侧; 以及布置在主衰减器单元的另一端侧的两点反射型光路改变反射器。从输入端口进入的光源在主衰减器单元中进行往返，并通过输出端口输出。

5. 发明授权

US07336418B1 Optical attenuator 有权
标题翻译：光衰减器
公开(公告)号：US07336418B1
公开(公告)日：2008-02-26
申请号：US09959671
申请日：2000-06-16
申请人： Hirotaka Kawai , Hiromitsu Umezawa , Isao Kojima , Hidenori Nakata , Teruhisa Sahashi
发明人： Hirotaka Kawai , Hiromitsu Umezawa , Isao Kojima , Hidenori Nakata , Teruhisa Sahashi
IPC分类号： G02B5/30
CPC分类号： G02B27/281 , G02F1/093 , G02F2203/48
摘要： An optical attenuator with increased dynamic range and reduced temperature-dependence over the dynamic range. The optical attenuator has a Faraday rotational angle variable device which applies an external magnetic field to light polarized by a garnet crystal, and a polarizer and an analyzer disposed at the front and rear of the optical axis of the device. There is an angle x formed between the plane of polarization of the light incident to the garnet crystal and the magnetic field orthogonal to the optical axis, where an angle y is formed between the polarizer and the analyzer, and the angle x is set to satisfy {(−z/2)+90×n}−12
摘要翻译：光衰减器具有动态范围的增加，并且在动态范围内降低了温度依赖性。光衰减器具有法拉第旋转角可变装置，其对由石榴石晶体偏振的光施加外部磁场，偏振器和分析器设置在装置的光轴的前后。在入射到石榴石晶体的光的偏振面和与光轴正交的磁场之间形成有角度x，其中在偏振器和分析器之间形成角度y，并且将角度x设定为满足 {（-z / 2）+ 90xn} -12

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