公开(公告)号：US09323000B2

公开(公告)日：2016-04-26

申请号：US13981304

申请日：2012-01-25

申请人： Takashi Saida ,  Yusuke Nasu ,  Takayuki Mizuno ,  Ryoichi Kasahara

发明人： Takashi Saida ,  Yusuke Nasu ,  Takayuki Mizuno ,  Ryoichi Kasahara

IPC分类号： G02B6/27 ,  G02B6/126 ,  G02B27/28

CPC分类号： G02B6/2706 ,  G02B6/126 ,  G02B27/283

摘要： Provided is a waveguide-type polarization beam splitter in which deterioration of a polarization extinction ratio due to temperature change and wavelength change is suppressed. The waveguide-type polarization beam splitter includes: input optical waveguides; a first multimode interference optical coupler; a pair of optical waveguide arms; a second multimode interference optical coupler; and output optical waveguides. A quarter wavelength delay is provided in one of the pair of optical waveguide arms, a groove is formed to extend across both of the pair of optical waveguide arms, and two quarter wave plates are provided in the groove to extend respectively across the arms. Polarization axes of the respective quarter wave plates are orthogonal to each other.

摘要翻译： 提供了抑制由于温度变化和波长变化引起的偏振消光比的劣化的波导型偏振光束分离器。 波导型偏振分束器包括：输入光波导; 第一个多模干涉光耦合器; 一对光波导臂; 第二多模干涉光耦合器; 并输出光波导。 在一对光波导臂中的一个中提供四分之一波长延迟，形成一个沟槽以延伸穿过该对光波导臂的两个，并且两个四分之一波片设置在凹槽中以分别延伸穿过臂。 各个四分之一波片的偏振轴彼此正交。

公开(公告)号：US09235003B2

公开(公告)日：2016-01-12

申请号：US13981285

申请日：2012-01-25

申请人： Takashi Saida ,  Yusuke Nasu ,  Takayuki Mizuno ,  Ryoichi Kasahara

发明人： Takashi Saida ,  Yusuke Nasu ,  Takayuki Mizuno ,  Ryoichi Kasahara

IPC分类号： G02B6/12 ,  G02B6/126 ,  G02B6/27 ,  G02B6/28

CPC分类号： G02B6/126 ,  G02B6/2793 ,  G02B6/2813 ,  G02B2006/12116 ,  G02B2006/1215

摘要： Provided is a waveguide-type polarization beam splitter in which deterioration of a polarization extinction ratio due to temperature change and wavelength change is suppressed. A groove is formed to extend across a pair of optical waveguide arms and two quarter wave plates are provided in the groove to extend respectively across the arms. Polarization axes of the quarter wave plates are orthogonal to each other. A first optical coupler which gives a phase difference of 0° or 180° between coupled or split light beams and a second optical coupler which gives a phase difference of 90° or −90° between coupled or split light beams are used in combination.

摘要翻译： 提供了抑制由于温度变化和波长变化引起的偏振消光比的劣化的波导型偏振光束分离器。 形成一个沟槽延伸穿过一对光波导臂，并且两个四分之一波片设置在凹槽中以分别延伸穿过臂。 四分之一波片的偏振轴彼此正交。 在耦合或分裂光束之间给出0°或180°的相位差的第一光耦合器和在耦合或分束光束之间给出90°或-90°的相位差的第二光耦合器组合使用。

公开(公告)号：US20130301977A1

公开(公告)日：2013-11-14

申请号：US13981304

申请日：2012-01-25

申请人： Takashi Saida ,  Yusuke Nasu ,  Takayuki Mizuno ,  Ryoichi Kasahara

发明人： Takashi Saida ,  Yusuke Nasu ,  Takayuki Mizuno ,  Ryoichi Kasahara

IPC分类号： G02B6/27

CPC分类号： G02B6/2706 ,  G02B6/126 ,  G02B27/283

摘要： Provided is a waveguide-type polarization beam splitter in which deterioration of a polarization extinction ratio due to temperature change and wavelength change is suppressed. The waveguide-type polarization beam splitter includes: input optical waveguides; a first multimode interference optical coupler; a pair of optical waveguide arms; a second multimode interference optical coupler; and output optical waveguides. A quarter wavelength delay is provided in one of the pair of optical waveguide arms, a groove is formed to extend across both of the pair of optical waveguide arms, and two quarter wave plates are provided in the groove to extend respectively across the arms. Polarization axes of the respective quarter wave plates are orthogonal to each other.

摘要翻译： 提供了抑制由于温度变化和波长变化引起的偏振消光比的劣化的波导型偏振光束分离器。 波导型偏振分束器包括：输入光波导; 第一个多模干涉光耦合器; 一对光波导臂; 第二多模干涉光耦合器; 并输出光波导。 在一对光波导臂中的一个中提供四分之一波长延迟，形成一个沟槽以延伸穿过该对光波导臂的两个，并且两个四分之一波片设置在凹槽中以分别延伸穿过臂。 各个四分之一波片的偏振轴彼此正交。

公开(公告)号：US20130301976A1

公开(公告)日：2013-11-14

申请号：US13981285

申请日：2012-01-25

申请人： Takashi Saida ,  Yusuke Nasu ,  Takayuki Mizuno ,  Ryoichi Kasahara

发明人： Takashi Saida ,  Yusuke Nasu ,  Takayuki Mizuno ,  Ryoichi Kasahara

IPC分类号： G02B6/126

CPC分类号： G02B6/126 ,  G02B6/2793 ,  G02B6/2813 ,  G02B2006/12116 ,  G02B2006/1215

摘要： Provided is a waveguide-type polarization beam splitter in which deterioration of a polarization extinction ratio due to temperature change and wavelength change is suppressed. A groove is formed to extend across a pair of optical waveguide arms and two quarter wave plates are provided in the groove to extend respectively across the arms. Polarization axes of the quarter wave plates are orthogonal to each other. A first optical coupler which gives a phase difference of 0° or 180° between coupled or split light beams and a second optical coupler which gives a phase difference of 90° or −90° between coupled or split light beams are used in combination.

摘要翻译： 提供了抑制由于温度变化和波长变化引起的偏振消光比的劣化的波导型偏振光束分离器。 形成一个沟槽延伸穿过一对光波导臂，并且两个四分之一波片设置在凹槽中以分别延伸穿过臂。 四分之一波片的偏振轴彼此正交。 在耦合或分裂光束之间给出0°或180°的相位差的第一光耦合器和在耦合或分束光束之间给出90°或-90°的相位差的第二光耦合器组合使用。

公开(公告)号：US06625370B2

公开(公告)日：2003-09-23

申请号：US09931684

申请日：2001-08-16

申请人： Mikitaka Itoh ,  Ryoichi Kasahara ,  Takashi Saida ,  Yasuhiro Hida

发明人： Mikitaka Itoh ,  Ryoichi Kasahara ,  Takashi Saida ,  Yasuhiro Hida

IPC分类号： G02B610

CPC分类号： G02B6/136 ,  G02B6/122 ,  G02B6/132 ,  G02B2006/12061 ,  G02B2006/12097 ,  G02B2006/121 ,  G02B2006/12176

摘要： An optical waveguide and an optical waveguide circuit having polarization insensitivity or a required low-level polarization dependence without degradation of the optical characteristics and reliability are disclosed, and a fabricating method of an optical waveguide and an optical waveguide circuit having polarization insensitivity or a required low-level polarization dependence without increasing the fabricating burden and the cost are disclosed. The optical waveguide comprises a planar substrate; a lower cladding which is provided on the planar substrate, where the lower cladding has a ridge; a core, provided on the ridge of the lower cladding, for transmitting light; and an upper cladding provided in a manner such that the core is covered with the upper cladding. The ridge has a shape predetermined so as to decrease polarization dependence of the optical waveguide to a required low level.

公开(公告)号：US08346030B2

公开(公告)日：2013-01-01

申请号：US12673473

申请日：2007-08-24

申请人： Yasuaki Hashizume ,  Manabu Oguma ,  Takashi Saida ,  Masaki Kotoku ,  Takayuki Mizuno

发明人： Yasuaki Hashizume ,  Manabu Oguma ,  Takashi Saida ,  Masaki Kotoku ,  Takayuki Mizuno

IPC分类号： G02B6/00

CPC分类号： G02B6/12007 ,  G02B6/272 ,  G02B6/2766 ,  G02B6/29302 ,  G02B6/29352 ,  G02B2006/12038

摘要： A Mach-Zehnder interferometer circuit (700) is provided with two couplers (722, 724) and two arm waveguides (706, 708) connecting the couplers with each other, each fabricated on a substrate, in which a polarization rotation device (732) is disposed in a groove dividing each of the two arm waveguides into two, the polarization rotation device (732) for converting vertically polarized light into horizontally polarized light, and birefringence is adjusted by performing laser irradiation or the like partially into at least one of the two arm waveguides such that a difference between birefringence values divided by an optical wavelength to be used is within a range of 2 m-0.2 to 2 m+0.2 (m is an integer including zero), the birefringence values being those integrated linearly along the respective two arm waveguides in an optical signal travelling direction.

摘要翻译： 马赫 - 策德尔干涉仪电路（700）设置有两个耦合器（722,724）和两个彼此连接的耦合器的臂波导（706,708），每个制造在基板上，偏振旋转装置（732） 设置在将两个臂波导中的每一个分成两个的凹槽中，用于将垂直偏振光转换成水平偏振光的偏振旋转装置（732），并且通过将激光照射等部分地进行至少一个 两臂波导使得双折射值除以所使用的光波长之间的差异在2m-0.2-2m + 0.2（m是包括零的整数）的范围内，双折射值是沿着 相应的两个臂波导在光信号行进方向上。

公开(公告)号：US20110103736A1

公开(公告)日：2011-05-05

申请号：US12673473

申请日：2007-08-24

申请人： Yasuaki Hashizume ,  Manabu Oguma ,  Takashi Saida ,  Masaki Kotoku ,  Takayuki Mizuno

发明人： Yasuaki Hashizume ,  Manabu Oguma ,  Takashi Saida ,  Masaki Kotoku ,  Takayuki Mizuno

IPC分类号： G02B6/00 ,  G02B6/12

CPC分类号： G02B6/12007 ,  G02B6/272 ,  G02B6/2766 ,  G02B6/29302 ,  G02B6/29352 ,  G02B2006/12038

摘要： A Mach-Zehnder interferometer circuit (700) is provided with two couplers (722, 724) and two arm waveguides (706, 708) connecting the couplers with each other, each fabricated on a substrate, in which a polarization rotation device (732) is disposed in a groove dividing each of the two arm waveguides into two, the polarization rotation device (732) for converting vertically polarized light into horizontally polarized light, and birefringence is adjusted by performing laser irradiation or the like partially into at least one of the two arm waveguides such that a difference between birefringence values divided by an optical wavelength to be used is within a range of 2m−0.2 to 2m+0.2 (m is an integer including zero), the birefringence values being those integrated linearly along the respective two arm waveguides in an optical signal travelling direction.

摘要翻译： 马赫 - 策德尔干涉仪电路（700）设置有两个耦合器（722,724）和两个彼此连接的耦合器的臂波导（706,708），每个制造在基板上，偏振旋转装置（732） 设置在将两个臂波导中的每一个分成两个的凹槽中，用于将垂直偏振光转换成水平偏振光的偏振旋转装置（732），并且通过将激光照射等部分地进行至少一个 双臂波导使得双折射值除以所使用的光波长之间的差异在2m-0.2-2m + 0.2（m是包括零的整数）的范围内，双折射值是沿着相应的两个线性地积分的那些 臂波导在光信号传播方向上。

公开(公告)号：US06724957B2

公开(公告)日：2004-04-20

申请号：US10213075

申请日：2002-08-07

申请人： Takashi Saida ,  Takayuki Mizuno ,  Akira Himeno ,  Katsunari Okamoto ,  Koichi Takiguchi ,  Manabu Oguma

发明人： Takashi Saida ,  Takayuki Mizuno ,  Akira Himeno ,  Katsunari Okamoto ,  Koichi Takiguchi ,  Manabu Oguma

IPC分类号： G02B626

CPC分类号： G02B6/29355 ,  G02B6/105 ,  G02B6/2938 ,  G02B6/29386 ,  G02B2006/12135 ,  G02B2006/12159

摘要： It is an object of the present invention to provide an optical filter which allows parameters to be easily adjusted, which allows birefringence and temperature dependence to be easily compensated for, and which is essentially free from dispersion. The optical filter includes an optical coupler that splits light into two beams, optical couplers connected to outputs of the optical coupler, a first group of two optical waveguide delay lines connected to the coupler, a second group of two optical waveguide delay lines connected to the coupler, an optical coupler that combines lights from the first group of the lines, an optical coupler that combines lights from the second group of the lines, and a multimode interference optical coupler that combines lights from the couplers together.

摘要翻译： 本发明的目的是提供一种允许容易地调整参数的光学滤波器，其允许容易地补偿双折射和温度依赖性，并且基本上没有分散。 光学滤波器包括将光分成两个光束的光耦合器，连接到光耦合器的输出的光耦合器，连接到耦合器的第一组两个光波导延迟线，连接到该耦合器的两个光波导延迟线的第二组 耦合器，组合来自第一组线路的光的光耦合器，组合来自第二组线路的光的光耦合器和将耦合器的光组合在一起的多模干涉光耦合器。

公开(公告)号：US06937797B2

公开(公告)日：2005-08-30

申请号：US09950635

申请日：2001-09-13

申请人： Takayuki Mizuno ,  Tsutomu Kitoh ,  Yasuyuki Inoue ,  Yoshinori Hibino ,  Mikitaka Itoh ,  Takashi Saida ,  Yasuhiro Hida

发明人： Takayuki Mizuno ,  Tsutomu Kitoh ,  Yasuyuki Inoue ,  Yoshinori Hibino ,  Mikitaka Itoh ,  Takashi Saida ,  Yasuhiro Hida

IPC分类号： G02B6/12 ,  G02B6/122 ,  G02B6/132 ,  G02B6/136 ,  G02B6/34 ,  G02B6/26

CPC分类号： G02B6/12011 ,  G02B6/12016 ,  G02B6/12023 ,  G02B6/1228 ,  G02B6/132 ,  G02B6/136 ,  G02B2006/121 ,  G02B2006/12176

摘要： A planar lightwave circuit is provided. The planar lightwave circuit includes a waveguide and a spotsize converter which is a part of the waveguide, wherein a core is embedded in a cladding in the waveguide, and the spotsize converter is located near an end face of a substrate on which the planar lightwave circuit is formed, the spotsize converter including: a core width fine-tuning part in an end face side of the substrate; and a core width converting part which follows the core width fine-tuning part; wherein core width of the spotsize converter is minimum at an end face of the substrate, a mean taper angle θ1 of the core width fine-tuning part is larger than 0° and smaller than a mean taper angle θ2 of the core width converting part.

摘要翻译： 提供平面光波电路。 平面光波电路包括作为波导的一部分的波导和斑点转换器，其中芯体嵌入在波导中的包层中，并且斑点转换器位于基板的端面附近，在该基板上的平面光波电路 所述斑点转换器包括：在所述基板的端面侧的芯宽度微调部; 以及沿着芯宽微调部分的芯宽转换部分; 其中斑点转换器的芯宽度在基板的端面处最小，芯宽度微调部分的平均锥角θ1大于0°并且小于平均锥角 核心宽度转换部分的θ2/2。

公开(公告)号：US08948546B2

公开(公告)日：2015-02-03

申请号：US13984480

申请日：2012-02-15

申请人： Takashi Saida ,  Hiroshi Yamazaki ,  Takashi Goh ,  Ken Tsuzuki ,  Shinji Mino

发明人： Takashi Saida ,  Hiroshi Yamazaki ,  Takashi Goh ,  Ken Tsuzuki ,  Shinji Mino

IPC分类号： G02F1/01 ,  H04B10/50 ,  G02B6/26 ,  G02B6/12 ,  G02F1/03 ,  H04B10/548

CPC分类号： G02F1/011 ,  H04B10/5053 ,  H04B10/548

摘要： An object of the present invention is to provide a temperature-independent optical frequency shifter for generating sub-carriers with a miniaturizable configuration, as well as to provide an all-optical OFDM modulator using the same that is compact, has low temperature dependence, and is even compatible with different frequency grids. Provided is an optical frequency shifter and an optical modulator using the same, the optical frequency shifter comprises one input optical port, a 1-input, 2-output optical coupler optically connected thereto, two Mach-Zehnder modulation units individually optically connected to the two outputs thereof, a 2-input, 2-output optical coupler optically connected to the individual outputs thereof, and two output optical ports optically connected to the outputs thereof, wherein the two Mach-Zehnder modulation units are driven by periodic waveforms at the same frequency whose phases differ from each other by (2p+1)π/2 (p: integer).

摘要翻译： 本发明的目的是提供一种用于产生具有小型化配置的子载波的与温度无关的光学移频器，并且提供使用紧凑的，具有低温度依赖性的全光OFDM调制器，以及 甚至兼容不同的频率网格。 提供一种光学移频器和使用其的光调制器，该光学移频器包括一个输入光端口，与其光学连接的1输入2输出光耦合器，两个马赫 - 曾德调制单元，其光学连接到两个 光耦合到其各个输出的2输入2输出光耦合器和与其输出光学连接的两个输出光端口，其中两个马赫 - 策德尔调制单元以相同频率的周期波形驱动 其相位彼此相差（2p + 1）＆pgr; / 2（p：整数）。