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。

公开(公告)号：US06798566B2

公开(公告)日：2004-09-28

申请号：US10173237

申请日：2002-06-13

申请人： Shohei Abe ,  Hidenori Nakada ,  Mototsugu Goto ,  Ikuo Maeda ,  Hideo Takeshita ,  Hiroaki Ono ,  Shusuke Wada

发明人： Shohei Abe ,  Hidenori Nakada ,  Mototsugu Goto ,  Ikuo Maeda ,  Hideo Takeshita ,  Hiroaki Ono ,  Shusuke Wada

IPC分类号： H01S300

CPC分类号： G02B6/29385 ,  G02B6/266 ,  G02B6/272 ,  G02B6/2766 ,  G02B6/29358 ,  G02B6/29361 ,  G02B27/283 ,  H01S3/005 ,  H01S2301/04

摘要： A variable optical gain equalizer in accordance with one embodiment of the present invention comprises a variable branching ratio beam splitter having a variable polarization rotator, the variable branching ratio beam splitter branching an input light beam into two light beams at an arbitrary power ratio, through control of the rotation angle of the polarization direction by the variable polarization rotator; an optical filter presenting different filter characteristics to the two branched output light beams; and a polarization coupler for polarization coupling the two light beams that have passed through the optical filter, wherein the rotation angle of the polarization direction is controlled by the variable polarization rotator so as to vary the spectra of the output light beams.

摘要翻译： 根据本发明的一个实施例的可变光学增益均衡器包括具有可变偏振旋转器的可变分光比分束器，可变分光比分光分束器通过控制将输入光束以任意的功率比分光成两个光束 通过可变偏振旋转器的偏振方向的旋转角度; 对两个分支输出光束具有不同滤光器特性的滤光器; 以及用于偏振耦合已经通过滤光器的两个光束的偏振耦合器，其中偏振方向的旋转角度由可变偏振旋转器控制，以便改变输出光束的光谱。

公开(公告)号：US06667827B2

公开(公告)日：2003-12-23

申请号：US10205148

申请日：2002-07-23

申请人： Hiroaki Ono ,  Shohei Abe ,  Hideo Takeshita ,  Shusuke Wada

发明人： Hiroaki Ono ,  Shohei Abe ,  Hideo Takeshita ,  Shusuke Wada

IPC分类号： G02F109

CPC分类号： G02F1/09 ,  G02F2202/40

摘要： A beam shutter is provided which comprises a plane-parallel birefringent element for separation arranged to separate input light beams having orthogonal polarization directions on the same optical path; a plane-parallel birefringent element for synthesis arranged to synthesize light beams having orthogonal polarization directions on different optical paths, for output; the birefringent element for separation and the birefringent element for synthesis being disposed in a spaced apart relationship; and polarization rotating means having a variable Faraday rotator, the polarization rotating means interposed between the birefringent element for separation and the birefringent element for synthesis, for magneto-optically controlling the polarization directions; wherein transmission and interruption of output light beams are controlled by switching the polarization directions by means of the variable Faraday rotator.

公开(公告)号：US07142362B2

公开(公告)日：2006-11-28

申请号：US10969195

申请日：2004-09-17

申请人： Hidenori Nakada ,  Shusuke Wada ,  Keisuke Ikeda ,  Yuko Ota

发明人： Hidenori Nakada ,  Shusuke Wada ,  Keisuke Ikeda ,  Yuko Ota

IPC分类号： G02B5/30 ,  G02B6/00

CPC分类号： G02B27/281

摘要： A low-cost compact optical attenuator structure has an input port and an output port for optical signals arranged side by side; a reflecting member arranged to face both ports to reverse light from the input side on an optical path folded 180°; a birefringence crystal splits incident light into two polarization components, a converging lens converges the incident light, a fixed Faraday rotator having a variable rotation angle arranged in that order in the optical path. The partial reflecting member that transmits a portion of incident light to the rear side thereof, an optical sensor at the rear side of the reflecting member, optical guide means guide only the transmitted light from the input port side to the optical sensor, and optical detection signals of the optical sensor are used as optical input monitoring signals.

摘要翻译： 低成本紧凑型光衰减器结构具有并排布置的用于光信号的输入端口和输出端口; 反射构件，被布置成面对两个端口以在180°的光路上反转来自输入侧的光; 双折射晶体将入射光分成两个偏振分量，会聚透镜会聚入射光，在光路中依次布置具有可变旋转角度的固定法拉第旋光器。 将入射光的一部分透射到其后侧的部分反射构件，反射构件的后侧的光学传感器，光导单元仅将从输入端侧向透过光引导到光学传感器， 光传感器的信号用作光输入监视信号。

公开(公告)号：US20060061863A1

公开(公告)日：2006-03-23

申请号：US10969195

申请日：2004-09-17

申请人： Hidenori Nakada ,  Shusuke Wada ,  Keisuke Ikeda ,  Yuko Ota

发明人： Hidenori Nakada ,  Shusuke Wada ,  Keisuke Ikeda ,  Yuko Ota

IPC分类号： G02B5/30

CPC分类号： G02B27/281

摘要： A low-cost compact optical attenuator having a simple structure is constructed from an input port and an output port for optical signals arranged side by side; a reflecting member arranged to face both of the ports to reverse light from the input side on an optical path folded 180°; a birefringence crystal which splits incident light into two polarization components, a converging lens which converges the incident light, a fixed Faraday rotator having a fixed rotation angle, and a variable Faraday rotator having a variable rotation angle arranged in that order in the optical path; wherein the reflecting member is a partial reflecting member that transmits a portion of the incident light to the rear side thereof, an optical sensor is provided at the rear side of the reflecting member, optical guide means are provided to guide only the transmitted light from the input port side to the optical sensor, and optical detection signals of the optical sensor are used as optical input monitoring signals.

摘要翻译： 具有简单结构的低成本紧凑型光衰减器由并排布置的光信号的输入端口和输出端口构成; 反射构件，其布置成面对两个端口以在180°的光路上反转来自输入侧的光; 将入射光分为两个偏振分量的双折射晶体，会聚入射光的会聚透镜，具有固定旋转角度的固定法拉第旋转器和在光路中依次排列的具有可变旋转角度的可变法拉第旋转器; 其中所述反射部件是将入射光的一部分透射到其后侧的部分反射部件，在所述反射部件的后侧设置有光学传感器，所述光导部件设置成只引导来自所述反射部件的透射光 输入端口侧，光传感器的光检测信号用作光输入监视信号。