公开(公告)号：US07242697B2

公开(公告)日：2007-07-10

申请号：US10459605

申请日：2003-06-12

申请人： Kazumasa Takabayashi

发明人： Kazumasa Takabayashi

IPC分类号： H01S3/10

CPC分类号： G02B6/2746 ,  G02B6/29358 ,  G02B6/29362 ,  G02F1/093 ,  G02F2203/055 ,  H01S3/1062 ,  H01S3/1066 ,  H01S5/141

摘要： A wavelength selection filter, a wavelenth selection laser, and a tunable laser for suppressing adverse effects of non-selected light when selected light is obtained by the wavelength selection filter. A linear polarizer is arranged on a side of the wavelength selection filter from which incoming light enters, and a first faraday element and a second faraday element arranged at respective locations between the linear polarizer and the wavelength selection filter, and between the wavelength selection filter and a reflection mirror for reflecting light having passed through the wavelength selection filter. After incoming light passes through a linear polarizer, selected light passes through the wavelength selection filter and is reflected by the reflection mirror, while non-selected light is reflected by the wavelength selection filter. The selected light and the non-selected light differ in the number of times they pass through faraday elements before they return to the linear polarizer.

摘要翻译： 波长选择滤波器，波长选择激光器和可调谐激光器，用于当通过波长选择滤波器获得所选择的光时，抑制非选择光的不利影响。 线偏振器布置在入射光入射的波长选择滤光片的一侧，布置在线偏振器和波长选择滤光器之间的相应位置处的第一法拉第元件和第二法拉第元件以及波长选择滤光片和 用于反射通过波长选择滤光器的光的反射镜。 入射光通过线性偏振器后，所选择的光通过波长选择滤光片并被反射镜反射，而未选择的光被波长选择滤光片反射。 所选择的光和未选择的光在它们返回到线性偏振器之前通过法拉第元件的次数不同。

公开(公告)号：US08724938B2

公开(公告)日：2014-05-13

申请号：US13358595

申请日：2012-01-26

申请人： Kazumasa Takabayashi

发明人： Kazumasa Takabayashi

IPC分类号： G02B6/42 ,  G02B6/10

CPC分类号： H01L31/03046 ,  H01L31/035281 ,  H01L31/105 ,  Y02E10/544

摘要： A tapered waveguide is provided for connection between an input waveguide and a photodiode. The width of the tapered waveguide increases as it extends from the input end that is connected to the input waveguide towards the output end that is connected to the photodiode. The tapered waveguide has an optimum half spread angle to cause higher-order mode excitation when receiving optical signal from the input waveguide. The photodiode either has a constant width or increases in width as it extends away from the output end of the tapered waveguide, its half spread angle being equal to or less than the half spread angle of the tapered waveguide.

摘要翻译： 提供锥形波导用于输入波导和光电二极管之间的连接。 锥形波导的宽度随着从连接到输入波导的输入端延伸到连接到光电二极管的输出端而增加。 锥形波导具有最佳的半扩展角，以在从输入波导接收光信号时引起高阶模式激励。 当光电二极管从锥形波导的输出端延伸出时，光电二极管或者具有恒定的宽度或宽度增加，其半扩展角度等于或小于锥形波导的半扩展角。

公开(公告)号：US08546899B2

公开(公告)日：2013-10-01

申请号：US13401016

申请日：2012-02-21

申请人： Kazumasa Takabayashi

发明人： Kazumasa Takabayashi

IPC分类号： H01L31/0232

CPC分类号： G02B6/12004 ,  G02B6/12002 ,  G02B6/2813

摘要： A light receiving element includes a waveguide that includes a waveguide core, a multi-mode interference waveguide that has a width larger than a width of the waveguide, the multi-mode interference waveguide receiving a first light from the waveguide core at a first end, and a photodetection portion that includes a first semiconductor layer and an absorption layer disposed on the first semiconductor layer, the first semiconductor layer including at least one layer and receiving a second light from the multi-mode interference waveguide at a second end, the absorption layer being disposed above the first semiconductor layer and absorbing the second light. A distance from the first end of the multi-mode interference waveguide to the second end of the photodetection portion is longer than 70% of a first length and shorter than 100% of the first length, the first length being a length where self-imaging occurs in the multi-mode interference waveguide.

摘要翻译： 光接收元件包括：波导，其包括波导芯，多模干涉波导，其宽度大于波导的宽度;多模干涉波导，在第一端接收来自波导芯的第一光; 以及光检测部，其包括设置在所述第一半导体层上的第一半导体层和吸收层，所述第一半导体层包括至少一层，并且在第二端接收来自所述多模干涉波导的第二光，所述吸收层 设置在第一半导体层上方并吸收第二光。 从多模干涉波导的第一端到光电检测部分的第二端的距离长于第一长度的70％且小于第一长度的100％，第一长度是自成像 发生在多模干涉波导中。

公开(公告)号：US08428399B2

公开(公告)日：2013-04-23

申请号：US12639068

申请日：2009-12-16

申请人： Kazumasa Takabayashi

发明人： Kazumasa Takabayashi

IPC分类号： G02F1/035 ,  G02B6/26

CPC分类号： G02F1/035 ,  B82Y20/00 ,  G02F1/01708 ,  G02F1/0316 ,  G02F1/0356 ,  Y10T29/49002 ,  Y10T29/49016 ,  Y10T29/49208

摘要： An optical module including a first optical coupler; a second optical coupler; a first optical waveguide; a second optical waveguide; a first electrode provided on the first optical waveguide; a second electrode provided on the second optical waveguide; a short electrode shorter than the first and second electrodes and provided on the second optical waveguide; and a first high-frequency connector and a second high-frequency connector; wherein, the short electrode provided on the second optical waveguide is coupled to the second high-frequency connector; and the first electrode provided on the first optical waveguide is coupled to the first high-frequency connector.

摘要翻译： 一种光学模块，包括第一光耦合器; 第二光耦合器; 第一光波导; 第二光波导; 设置在所述第一光波导上的第一电极; 设置在所述第二光波导上的第二电极; 短电极比第一和第二电极短，并设置在第二光波导上; 和第一高频连接器和第二高频连接器; 其中，设置在第二光波导上的短电极耦合到第二高频连接器; 并且设置在第一光波导上的第一电极耦合到第一高频连接器。

公开(公告)号：US07873082B2

公开(公告)日：2011-01-18

申请号：US12545422

申请日：2009-08-21

申请人： Kazumasa Takabayashi

发明人： Kazumasa Takabayashi

IPC分类号： H01S3/10 ,  H01S5/00

CPC分类号： H01S5/06256 ,  B82Y20/00 ,  H01S5/0268 ,  H01S5/0425 ,  H01S5/0654 ,  H01S5/1221 ,  H01S5/204 ,  H01S5/34306 ,  H01S5/4031 ,  H01S5/4087

摘要： A semiconductor integrated device includes a plurality of wavelength tunable lasers, provided on a semiconductor substrate, and having oscillation wavelength ranges different from each other. Each of the wavelength tunable lasers includes an optical waveguide including, alternately in an optical axis direction, a gain waveguide portion and a wavelength controlling waveguide portion, and a diffraction grating provided over both the gain waveguide portion and the wavelength controlling waveguide portion. A value obtained by dividing a width of the wavelength controlling waveguide portion by a width of the gain waveguide portion in one of the plurality of wavelength tunable lasers is larger than a value obtained by dividing a width of the wavelength controlling waveguide portion by a width of the gain waveguide portion in a different one of the wavelength tunable lasers, which oscillates on a shorter wavelength side with respect to an oscillation wavelength range of the one wavelength tunable laser.

摘要翻译： 半导体集成器件包括设置在半导体衬底上并具有彼此不同的振荡波长范围的多个波长可调谐激光器。 每个波长可调激光器包括光波导，其在光轴方向上交替地包括增益波导部分和波长控制波导部分，以及设置在增益波导部分和波长控制波导部分两者上的衍射光栅。 通过将波长控制波导部分的宽度除以多个波长可调激光器之一中的增益波导部分的宽度获得的值大于通过将波长控制波导部分的宽度除以宽度 波长可调激光器中的增益波导部分相对于一个波长可调激光器的振荡波长范围在较短波长侧振荡。

公开(公告)号：US06847662B2

公开(公告)日：2005-01-25

申请号：US10352044

申请日：2003-01-28

申请人： Martin Bouda ,  Ken Morito ,  Kazumasa Takabayashi ,  Tadao Nakazawa ,  Naoki Hashimoto ,  Hiroshi Onaka ,  Yuji Kotaki

发明人： Martin Bouda ,  Ken Morito ,  Kazumasa Takabayashi ,  Tadao Nakazawa ,  Naoki Hashimoto ,  Hiroshi Onaka ,  Yuji Kotaki

IPC分类号： H01S3/106 ,  H01S5/062 ,  H01S5/14 ,  H01S3/10

CPC分类号： H01S5/141 ,  H01S3/0632 ,  H01S3/082 ,  H01S3/1068 ,  H01S5/06226 ,  H01S5/101 ,  H01S5/1085 ,  H01S5/142

摘要： A wavelength-selectable laser with a resonance region formed by two reflecting surfaces include a gain medium generating a laser beam, a first filter, and a second filter. The first filter has a first controllable transmission region and transmits a first predetermined wavelength region of the laser beam generated in the gain medium, the first predetermined wavelength region matching the first controllable transmission region. The second filter has a plurality of periodically arranged second transmission regions and transmits a second predetermined wavelength region of the laser beam transmitted by the first filter, the second predetermined wavelength region matching one of the second transmission regions.

摘要翻译： 具有由两个反射表面形成的谐振区域的波长可选择激光器包括产生激光束，第一滤光器和第二滤光器的增益介质。 第一滤波器具有第一可控传输区域，并且透射在增益介质中产生的激光束的第一预定波长区域，第一预定波长区域与第一可控传输区域匹配。 第二滤光器具有多个周期性排列的第二透射区域，并且透射由第一滤光器透射的激光束的第二预定波长区域，第二预定波长区域与第二透射区域中的一个匹配。

公开(公告)号：US20090310630A1

公开(公告)日：2009-12-17

申请号：US12545422

申请日：2009-08-21

申请人： Kazumasa Takabayashi

发明人： Kazumasa Takabayashi

IPC分类号： H01S3/10 ,  H01S5/125 ,  H01S3/08

CPC分类号： H01S5/06256 ,  B82Y20/00 ,  H01S5/0268 ,  H01S5/0425 ,  H01S5/0654 ,  H01S5/1221 ,  H01S5/204 ,  H01S5/34306 ,  H01S5/4031 ,  H01S5/4087

摘要： A semiconductor integrated device includes a plurality of wavelength tunable lasers, provided on a semiconductor substrate, and having oscillation wavelength ranges different from each other. Each of the wavelength tunable lasers includes an optical waveguide including, alternately in an optical axis direction, a gain waveguide portion and a wavelength controlling waveguide portion, and a diffraction grating provided over both the gain waveguide portion and the wavelength controlling waveguide portion. A value obtained by dividing a width of the wavelength controlling waveguide portion by a width of the gain waveguide portion in one of the plurality of wavelength tunable lasers is larger than a value obtained by dividing a width of the wavelength controlling waveguide portion by a width of the gain waveguide portion in a different one of the wavelength tunable lasers, which oscillates on a shorter wavelength side with respect to an oscillation wavelength range of the one wavelength tunable laser.

摘要翻译： 半导体集成器件包括设置在半导体衬底上并具有彼此不同的振荡波长范围的多个波长可调谐激光器。 每个波长可调激光器包括光波导，其在光轴方向上交替地包括增益波导部分和波长控制波导部分，以及设置在增益波导部分和波长控制波导部分两者上的衍射光栅。 通过将波长控制波导部分的宽度除以多个波长可调激光器之一中的增益波导部分的宽度获得的值大于通过将波长控制波导部分的宽度除以宽度 波长可调激光器中的增益波导部分相对于一个波长可调激光器的振荡波长范围在较短波长侧振荡。

公开(公告)号：US20070258681A1

公开(公告)日：2007-11-08

申请号：US11826592

申请日：2007-07-17

申请人： Kazumasa Takabayashi ,  Ken Morito

发明人： Kazumasa Takabayashi ,  Ken Morito

IPC分类号： G02B6/26

CPC分类号： G02F1/025 ,  B82Y20/00 ,  G02B6/14 ,  G02B6/2813 ,  G02B2006/12152 ,  G02F1/01708 ,  G02F2001/217 ,  H01S5/026 ,  H01S5/0265 ,  H01S5/028 ,  H01S5/06206 ,  H01S5/101 ,  H01S5/1014 ,  H01S5/12 ,  H01S5/20 ,  H01S5/50

摘要： In order to make it possible to suppress the influence of reflected light on a connection interface easily and with certainty, an optical waveguide device includes a first optical waveguide (1), a second optical waveguide (2) formed from a material or in a structure different from that of the first optical waveguide (1) and connected to the first optical waveguide (1), and a 1×1 multimode interference waveguide (3) formed by increasing the widths of the first optical waveguide (1) and the second optical waveguide (2) in the proximity of a connection interface between the first optical waveguide (1) and the second optical waveguide (2).

摘要翻译： 为了能够容易地且可靠地抑制反射光对连接界面的影响，光波导装置包括第一光波导（1），由材料或结构形成的第二光波导（2） 与第一光波导（1）的不同，并且连接到第一光波导（1），以及通过增加第一光波导（1）和第二光波导（1）的宽度形成的1x1多模干涉波导（3） 2）在第一光波导（1）和第二光波导（2）之间的连接接口附近。

公开(公告)号：US20060209911A1

公开(公告)日：2006-09-21

申请号：US11235250

申请日：2005-09-27

申请人： Kazumasa Takabayashi

发明人： Kazumasa Takabayashi

IPC分类号： H01S3/10 ,  H01S5/00

CPC分类号： H01S5/12 ,  H01S5/0425 ,  H01S5/06256 ,  H01S5/06258 ,  H01S5/1218 ,  H01S5/1221 ,  H01S5/124 ,  H01S5/125 ,  H01S5/4012 ,  H01S5/4087

摘要： A tunable laser includes an optical waveguide alternately including a gain waveguide portion and a wavelength controlling waveguide portion, and a diffraction grating. The diffraction grating includes a gain diffraction grating and a wavelength controlling diffraction grating. A wavelength controlling region is configured such that the wavelength controlling waveguide portion and the wavelength controlling diffraction grating are included therein. A gain region is configured such that the gain waveguide portion and the gain diffraction grating are included therein. The Bragg wavelength of the wavelength controlling region is longer than that of the gain region in a state in which current injection or voltage application is not performed for the wavelength controlling waveguide portion.

摘要翻译： 可调谐激光器包括交替地包括增益波导部分和波长控制波导部分的光波导和衍射光栅。 衍射光栅包括增益衍射光栅和波长控制衍射光栅。 波长控制区域被配置为使得波长控制波导部分和波长控制衍射光栅包括在其中。 增益区域被配置为使得增益波导部分和增益衍射光栅包括在其中。 在不对波长控制波导部分进行电流注入或施加电压的状态下，波长控制区域的布拉格波长比增益区域的布拉格波长长。

公开(公告)号：US20060002436A1

公开(公告)日：2006-01-05

申请号：US11023985

申请日：2004-12-29

申请人： Kazumasa Takabayashi ,  Tadao Nakazawa ,  Yumi Nakazawa ,  Takashi Shiraishi

发明人： Kazumasa Takabayashi ,  Tadao Nakazawa ,  Yumi Nakazawa ,  Takashi Shiraishi

IPC分类号： H01S3/10

CPC分类号： H01S3/106 ,  H01S5/141

摘要： A wavelength tunable laser is constituted by including a resonator composed of a pair of reflectors arranged to face each other, and inside the resonator, a SOA radiating a laser beam with a gain for a wide range of wavelengths, a transmission-type wavelength tunable filter having an asymmetric filter characteristic, and a phase controller controlling a phase of the laser beam resonating inside the resonator.

摘要翻译： 波长可调激光器由包括由一对反射器组成的谐振器构成，谐振器内部设置有用于宽波长增益的激光束，透射型波长可调滤波器 具有非对称滤波器特性，以及控制在谐振器内共振的激光束的相位的相位控制器。