公开(公告)号：US08457168B2

公开(公告)日：2013-06-04

申请号：US12086287

申请日：2007-01-10

申请人： Koji Kudo ,  Shinya Sudo ,  Kenji Sato ,  Kenji Mizutani

发明人： Koji Kudo ,  Shinya Sudo ,  Kenji Sato ,  Kenji Mizutani

IPC分类号： H01S5/00

CPC分类号： H01S5/026

摘要： A semiconductor optical waveguide-A having an optical amplification function and a semiconductor optical waveguide-B having a light control function are integrated together on the same substrate. A facet of the semiconductor optical waveguide-A facing an isolation trench and a facet of the semiconductor optical waveguide-B facing the isolation trench are configured as a composite optical reflector/optical connector using an optical interference. The facet of the semiconductor optical waveguide-A achieves an optical reflectivity not higher than the reflectivity corresponding to a cleaved facet and not smaller than several percent, and an optical coupling coefficient of not lower than 50% between the semiconductor optical waveguide-A and the semiconductor optical waveguide-B.

摘要翻译： 具有光放大功能的半导体光波导A和具有光控功能的半导体光波导-B一起集成在同一基板上。 面向隔离沟槽的半导体光波导A的面和面向隔离沟槽的半导体光波导-B的面被配置为使用光学干涉的复合光反射器/光连接器。 半导体光波导A的小面实现不高于对应于切割面的反射率并且不小于几个百分比的光学反射率，并且半导体光波导A与第二半导体光波导A之间的光耦合系数不低于50％ 半导体光波导-B。

公开(公告)号：US20130113641A1

公开(公告)日：2013-05-09

申请号：US13698019

申请日：2011-04-28

申请人： Shinya Sudo ,  Kenji Sato

发明人： Shinya Sudo ,  Kenji Sato

IPC分类号： G02F1/01 ,  H03M1/12

CPC分类号： G02F1/011 ,  G02F1/225 ,  G02F1/3517 ,  G02F7/00 ,  H03M1/12 ,  Y10T29/49

摘要： An optical intensity-to-phase converter according to the present invention includes first and second waveguides to which a first input light is input, a third waveguide to which a second input light is input, and an interaction region that is provided in common on the second and third waveguides in which the first and second input lights are multiplexed and interact. The optical intensity-to-phase converter provides delay to output lights output from the first and second waveguides based on intensity of the first or second input light. Then, it is possible to provide an optical intensity-to-phase converter that enables simple configuration of an optical A/D converter.

摘要翻译： 根据本发明的光强度相变转换器包括输入第一输入光的第一波导和第二波导，输入第二输入光的第三波导和在其上共同设置的相互作用区 第二和第三波导，其中第一和第二输入光被复用和相互作用。 光强度相变转换器基于第一或第二输入光的强度向第一和第二波导输出的输出光提供延迟。 然后，可以提供能够简单配置光学A / D转换器的光学强度相变转换器。

公开(公告)号：US20120224856A1

公开(公告)日：2012-09-06

申请号：US13508721

申请日：2010-09-28

申请人： Kenji Sato ,  Shinya Sudo

发明人： Kenji Sato ,  Shinya Sudo

IPC分类号： H04J14/00

CPC分类号： H04B10/5053 ,  G02F2203/56 ,  H04B10/516

摘要： The present invention has an object to provide an optical modulation device and an optical modulation method that achieve an excellent spectral efficiency with a simple and compact configuration and low power consumption. An optical modulation device according to an exemplary aspect of the present invention includes a CW light source (11), a coupler (12), optical modulators (14a) and (14b), an optical frequency shifter (15b), a serial-to-parallel converter (21), and a delay circuit (24a). The serial-to-parallel converter (21) divides a data signal having a bit rate B into two data strings having a bit rate B/2, and extracts a clock signal (CLK). The delay circuit (24a) temporally synchronizes the two data strings. CW light emitted from the CW light source is split into two beams by the coupler (12). The optical modulators (14a) and (14b) generate optical signals by modulating the two split light beams according to the data strings. The optical frequency shifter (15b) shifts center frequencies of the optical signals by Δf=B/(2×2) according to the clock signal (CLK).

摘要翻译： 本发明的目的是提供一种光调制装置和光调制方法，其以简单紧凑的结构和低功耗实现了优异的光谱效率。 根据本发明的示例性方面的光调制装置包括CW光源（11），耦合器（12），光调制器（14a）和（14b），光移频器（15b），串 - 并联转换器（21）和延迟电路（24a）。 串行到并行转换器（21）将具有比特率B的数据信号分成具有比特率B / 2的两个数据串，并提取时钟信号（CLK）。 延迟电路（24a）在时间上同步两个数据串。 从CW光源发射的CW光被耦合器（12）分成两束。 光调制器（14a）和（14b）通过根据数据串调制两个分束光束来产生光信号。 光移位器（15b）根据时钟信号（CLK）将光信号的中心频率移位＆Dgr; f = B /（2×2）。

公开(公告)号：US07991024B2

公开(公告)日：2011-08-02

申请号：US11994085

申请日：2006-06-29

申请人： Kenji Sato ,  Jan De Merli ,  Kenji Mizutani ,  Koji Kudo ,  Shinya Sudo ,  Mads. L Nielsen

发明人： Kenji Sato ,  Jan De Merli ,  Kenji Mizutani ,  Koji Kudo ,  Shinya Sudo ,  Mads. L Nielsen

IPC分类号： H01S3/13 ,  H01S3/08

CPC分类号： H01S5/141

摘要： In an external cavity wavelength tunable laser device including an external cavity (20) which includes a semiconductor optical amplifier (2) and performs laser oscillation operation by feeding back external light, a wavelength tunable mirror (7) having at least a single-peak reflection spectrum characteristic within a laser wavelength tuning range is placed on one end of the external cavity (20), and a Fabry-Perot mode interval determined by the effective length of the external cavity (20) is not less than 1/10 times and not more than 10 times the reflection band full width half maximum of the wavelength tunable mirror (7).

摘要翻译： 在包括具有半导体光放大器（2）的外部空腔（20）并通过反馈外部光进行激光振荡操作的外腔波长可调激光器件中，具有至少单峰反射的波长可调谐镜（7） 在激光波长调谐范围内的光谱特性被放置在外腔（20）的一端，并且由外腔（20）的有效长度确定的法布里 - 珀罗模式间隔不小于1/10倍 波长可调镜（7）的反射带全宽度的最大半数的10倍以上。

公开(公告)号：US20090122817A1

公开(公告)日：2009-05-14

申请号：US12064441

申请日：2006-09-04

申请人： Kenji Sato ,  Jan De Merli ,  Kenji Mizutani ,  Shinya Sudo ,  Koji Kudo ,  Hiroyuki Yamazaki

发明人： Kenji Sato ,  Jan De Merli ,  Kenji Mizutani ,  Shinya Sudo ,  Koji Kudo ,  Hiroyuki Yamazaki

IPC分类号： H01S3/10 ,  G02B6/10

CPC分类号： G02B6/12007 ,  G02F1/313 ,  G02F2203/15 ,  G02F2203/585 ,  H01S5/02248 ,  H01S5/0687 ,  H01S5/101 ,  H01S5/1032 ,  H01S5/142

摘要： Only the light at an overlapping wavelength of the transmission characteristics of at least two wavelength selecting filters is looped, and at least one of the wavelength selecting filters varies a selected wavelength. Since a loss due to the optical filters is small and there is not a loss caused by a highly reflecting film, the output of an external-resonator variable-wavelength laser can be increased. Optical circuit component (8) divides light input from external device (1) into at least two ports. Loop waveguide (11) interconnects at least ports (9, 10) divided by optical circuit component (8) in the form of a loop. At least two first wavelength selecting filters (12, 13) are inserted in series in a path of loop waveguide (11), and have periodic transmission characteristics on a frequency axis which are different from each other. At least one of first wavelength selecting filters (12, 13) varies the selected wavelength.

摘要翻译： 只有至少两个波长选择滤波器的传输特性的重叠波长的光被环绕，并且至少一个波长选择滤波器改变选定的波长。 由于由于滤光器引起的损耗小，并且不会由高反射膜引起的损耗，所以可以增加外部谐振器可变波长激光器的输出。 光电路部件（8）将从外部设备（1）输入的光分成至少两个端口。 环形波导（11）至少以循环形式的由光电路部件（8）划分的端口（9,10）互连。 至少两个第一波长选择滤波器（12,13）串联插入到环形波导（11）的路径中，并且在频率轴上具有彼此不同的周期性传输特性。 第一波长选择滤光器（12,13）中的至少一个改变所选择的波长。

公开(公告)号：US20090141747A1

公开(公告)日：2009-06-04

申请号：US11994085

申请日：2006-06-29

申请人： Kenji Sato ,  Jan De Merli ,  Kenji Mizutani ,  Koji Kudo ,  Shinya Sudo ,  Mads L. Nielsen

发明人： Kenji Sato ,  Jan De Merli ,  Kenji Mizutani ,  Koji Kudo ,  Shinya Sudo ,  Mads L. Nielsen

IPC分类号： H01S3/10

CPC分类号： H01S5/141

摘要： In an external cavity wavelength tunable laser device including an external cavity (20) which includes a semiconductor optical amplifier (2) and performs laser oscillation operation by feeding back external light, a wavelength tunable mirror (7) having at least a single-peak reflection spectrum characteristic within a laser wavelength tuning range is placed on one end of the external cavity (20), and a Fabry-Perot mode interval determined by the effective length of the external cavity (20) is not less than 1/10 times and not more than 10 times the reflection band full width half maximum of the wavelength tunable mirror (7).

摘要翻译： 在包括具有半导体光放大器（2）的外部空腔（20）并通过反馈外部光进行激光振荡操作的外腔波长可调激光器件中，具有至少单峰反射的波长可调谐镜（7） 在激光波长调谐范围内的光谱特性被放置在外腔（20）的一端，并且由外腔（20）的有效长度确定的法布里 - 珀罗模式间隔不小于1/10倍 波长可调镜（7）的反射带全宽度的最大半数的10倍以上。

公开(公告)号：US20070003183A1

公开(公告)日：2007-01-04

申请号：US10569454

申请日：2004-08-30

申请人： Kazuhiro Shiba ,  Koichi Naniwae ,  Shinya Sudo ,  Koji Kudo

发明人： Kazuhiro Shiba ,  Koichi Naniwae ,  Shinya Sudo ,  Koji Kudo

IPC分类号： G02B6/12

CPC分类号： G02B6/122 ,  G02B6/125 ,  G02B6/131 ,  G02B6/2813

摘要： Input ports (103a, 103b) formed from fundamental mode waveguides are provided at one end of a multimode waveguide (104). Further, an output port (105) formed from a fundamental mode waveguide is provided at the other end of the multimode waveguide (104). The multimode waveguide (104) has a width wider than those of the input ports (103a, 103b) and the output port (105), and provides modes including multimode to the waveguide. The multimode waveguide (104) is embedded with a buried layer (200). Both of the end faces of the multimode waveguide (104) are made to be planes equivalent to a (100) plane or planes inclined from these planes. In a case of inclined planes, the planes are made to be planes inclined to a direction that the waveguide region spreads toward a stacked direction of the semiconductor layers.

摘要翻译： 在多模波导（104）的一端设置由基波导波导形成的输入端口（103a，103b）。 此外，在多模波导（104）的另一端设置由基波导波导形成的输出端口（105）。 多模波导（104）的宽度大于输入端口（103a，103b）和输出端口（105）的宽度，并且提供包括多模式到波导的模式。 多模波导（104）嵌入有埋层（200）。 多模波导（104）的两个端面被制成与（100）平面相等的平面或从这些平面倾斜的平面。 在倾斜平面的情况下，将这些平面制成为使波导区域向半导体层的堆叠方向扩展的方向倾斜的面。

公开(公告)号：US08705980B2

公开(公告)日：2014-04-22

申请号：US13508721

申请日：2010-09-28

申请人： Kenji Sato ,  Shinya Sudo

发明人： Kenji Sato ,  Shinya Sudo

IPC分类号： H04B10/12

CPC分类号： H04B10/5053 ,  G02F2203/56 ,  H04B10/516

摘要： The present invention has an object to provide an optical modulation device and an optical modulation method that achieve an excellent spectral efficiency with a simple and compact configuration and low power consumption. An optical modulation device according to an exemplary aspect of the present invention includes a CW light source (11), a coupler (12), optical modulators (14a) and (14b), an optical frequency shifter (15b), a serial-to-parallel converter (21), and a delay circuit (24a). The serial-to-parallel converter (21) divides a data signal having a bit rate B into two data strings having a bit rate B/2, and extracts a clock signal (CLK). The delay circuit (24a) temporally synchronizes the two data strings. CW light emitted from the CW light source is split into two beams by the coupler (12). The optical modulators (14a) and (14b) generate optical signals by modulating the two split light beams according to the data strings. The optical frequency shifter (15b) shifts center frequencies of the optical signals by Δf=B/(2×2) according to the clock signal (CLK).

摘要翻译： 本发明的目的是提供一种光调制装置和光调制方法，其以简单紧凑的结构和低功耗实现了优异的光谱效率。 根据本发明的示例性方面的光调制装置包括CW光源（11），耦合器（12），光调制器（14a）和（14b），光移频器（15b），串 - 并联转换器（21）和延迟电路（24a）。 串行到并行转换器（21）将具有比特率B的数据信号分成具有比特率B / 2的两个数据串，并提取时钟信号（CLK）。 延迟电路（24a）在时间上同步两个数据串。 从CW光源发射的CW光被耦合器（12）分成两束。 光调制器（14a）和（14b）通过根据数据串调制两个分束光束来产生光信号。 光移位器（15b）根据时钟信号（CLK）将光信号的中心频率移位＆Dgr; f = B /（2×2）。

公开(公告)号：US08600198B2

公开(公告)日：2013-12-03

申请号：US13254336

申请日：2010-03-05

申请人： Shinya Sudo ,  Tomoaki Kato ,  Kenji Sato ,  Takao Morimoto

发明人： Shinya Sudo ,  Tomoaki Kato ,  Kenji Sato ,  Takao Morimoto

IPC分类号： G02F1/035 ,  G02F1/01 ,  G02B6/10 ,  H01L21/00 ,  H01L33/00

CPC分类号： G02F1/2257 ,  G02F2001/212 ,  G02F2201/05 ,  G02F2201/063

摘要： The invention provides a semiconductor optical modulator including a two-step mesa optical waveguide having a first clad layer (101); a mesa-like core layer (102) formed over the first clad layer (101); and a second clad layer (103) formed into a mesa shape over the core layer (102), and having a mesa width smaller than that of the core layer (102). The two-step mesa optical waveguide includes a multi-mode optical waveguide region to which an electric field is applied or into which an electric current is injected, and a single-mode optical waveguide region to which the electric field is not applied and into which the electric current is not injected. When the mesa width of the core layer in the multi-mode optical waveguide region is defined as Wmesa1, and the mesa width of the core layer in the single-mode optical waveguide region is defined as Wmesa2, Wmesa1>Wmesa2 is satisfied.

摘要翻译： 本发明提供一种半导体光调制器，包括具有第一覆层（101）的两步台面光波导; 在所述第一包层（101）上形成的台面状芯层（102）; 以及在所述芯层（102）上形成为台面形状的第二包层（103），并且具有比所述芯层（102）的台面宽度小的台面宽度。 两级台面光波导包括施加电场或注入电流的多模光波导区域和不施加电场的单模光波导区域，其中 电流不会被注入。 当多模光波导区域中的核心层的台面宽度被定义为Wmesa1时，单模光波导区域中的核心层的台面宽度被定义为Wmesa2，所以满足Wmesa1> Wmesa2。

公开(公告)号：US20130063806A1

公开(公告)日：2013-03-14

申请号：US13698018

申请日：2011-04-28

申请人： Shinya Sudo ,  Kenji Sato

发明人： Shinya Sudo ,  Kenji Sato

IPC分类号： H03M1/12 ,  B23P11/00 ,  G02F2/00

CPC分类号： G02F7/00 ,  G02F2/00 ,  G02F2002/006 ,  G02F2203/50 ,  Y10T29/49826

摘要： An optical A/D converter according to the present invention includes an optical splitter that splits an analog input signal light into plurals, a plurality of Mach-Zehnder interferometers to which each of the signal lights split by the optical splitter is input, and plurality of optical/electrical conversion unit that convert each signal lights output from each Mach-Zehnder interferometer into a digital electrical signal, in which each Mach-Zehnder interferometer includes optical intensity-to-phase conversion unit that optically convert intensity of the input signal light into an amount of phase shift and the amount of phase shift differs for each Mach-Zehnder interferometer. Then, it is possible to provide a high speed and low power consuming optical demodulation circuit.

摘要翻译： 根据本发明的光学A / D转换器包括将模拟输入信号光分解为多个的光分路器，输入由光分路器分离的每个信号光的多个马赫 - 曾德干涉仪，并且多个 将每个马赫 - 策德尔干涉仪输出的每个信号光转换为数字电信号的光/电转换单元，其中每个马赫 - 策德尔干涉仪包括光学强度 - 相位转换单元，其将输入信号光的强度光学地转换成 每个Mach-Zehnder干涉仪的相移量和相移量都不同。 然后，可以提供高速，低功耗的光解调电路。