公开(公告)号：US06919985B2

公开(公告)日：2005-07-19

申请号：US10364522

申请日：2003-02-12

申请人： Yukio Furukawa ,  Hajime Sakata

发明人： Yukio Furukawa ,  Hajime Sakata

IPC分类号： G02F1/37 ,  G02F1/35 ,  G02F1/377 ,  G02F1/39

CPC分类号： G02F1/3544 ,  G02F1/3534 ,  G02F1/3551 ,  G02F2001/3548 ,  G02F2203/21

摘要： An optical wavelength converting apparatus comprising first and second light sources and a nonlinear optical material. Beams from the two light sources, incident on the material, generate sum frequency light of these beams. The nonlinear optical material is provided with a periodic structure that matches phases of the beams from the two light sources with a phase of the sum frequency light of these beams. Also, wavelengths of the beams from the two light sources and of the sum frequency light of these beams, polarization directions of these three beams in the material, and propagation directions of these three beams in the material are determined such that an efficiency of conversion into sum frequency light does not change even with a change in one of the defining parameters, thus providing an advantageous pumping light source.

摘要翻译： 一种光波长转换装置，包括第一和第二光源和非线性光学材料。 来自两个光源的光束，入射到材料上，产生这些光束的和频。 非线性光学材料设置有周期性结构，其使来自两个光源的光束的相位与这些光束的和频光的相位匹配。 此外，来自两个光源的光束的波长以及这些光束的和频光，材料中的这三个光束的偏振方向以及材料中的这三个光束的传播方向被确定为使得转换成 即使在一个定义参数的变化中，和频频率光也不改变，从而提供有利的泵浦光源。

公开(公告)号：US06201644B1

公开(公告)日：2001-03-13

申请号：US09190098

申请日：1998-11-12

申请人： Hajime Sakata ,  Takayuki Yagi

发明人： Hajime Sakata ,  Takayuki Yagi

IPC分类号： G02B2710

CPC分类号： G02B6/3512 ,  G02B6/3556 ,  G02B6/356 ,  G02B6/357 ,  G02B26/0875

摘要： A light deflection device comprises a segmental sphere body having a deflection face portion for deflecting and transmitting an incident light beam, and a segmental sphere face portion opposing to the deflecting face portion, a base plate for supporting the segmental sphere body in a turnable manner, and a driving means for turning the segmental sphere body, the refractive index of the segmental sphere body being different from the refractive index of a space or medium brought into contact with the deflection face portion. A light deflection device array coomprises the light deflection devices arranged in a one-dimensional or two-dimensional array.

摘要翻译： 光偏转装置包括具有用于偏转和透射入射光束的偏转面部分和与偏转面部分相对的节段球面部分的节段球体，用于以可转动的方式支撑节段球体的基板， 以及用于转动节段球体的驱动装置，节段球体的折射率不同于与偏转面部分接触的空间或介质的折射率。 光偏转装置阵列包括以一维或二维阵列排列的光偏转装置。

公开(公告)号：US5233187A

公开(公告)日：1993-08-03

申请号：US978156

申请日：1992-11-17

申请人： Hajime Sakata ,  Shinsuke Takeuchi

发明人： Hajime Sakata ,  Shinsuke Takeuchi

IPC分类号： G02B6/34 ,  G02B6/42 ,  H01S5/00 ,  H01S5/026 ,  H01S5/10 ,  H01S5/40 ,  H01S5/50

CPC分类号： H01S5/4031 ,  G02B6/4249 ,  H01S5/1032 ,  G02B6/29316 ,  H01S5/0028 ,  H01S5/0264 ,  H01S5/1035 ,  H01S5/4025 ,  H01S5/4087 ,  H01S5/5045

摘要： In a multi-wavelength light detecting and/or emitting apparatus, there are provided of a first unit of a first directional coupler having a grating for an optical coupling function and a photodetector having a photoelectric conversion function and a second unit of a second directional coupler having a grating for an optical coupling function and a semiconductor laser, and a common light waveguide extending parallel with the unit in a light propagating direction. The first directional coupler and the photodetector are serially arranged in the light propagating direction and parallel with the common light waveguide, and the second directional coupler and the semiconductor laser are serially arranged in the light propagating direction and parallel with the common light waveguide. When there are formed a plurality of the first units and the gratings have different pitches, wavelength multiplexed light signals can be simultaneously detected per each wavelength with an equal detection performance. When there are formed a plurality of the second units and the gratings have different pitches, laser lights of different wavelengths can be emitted from a single emission end of the common waveguide and the semiconductor lasers can be independently driven.

摘要翻译： 在多波长光检测和/或发射装置中，提供了具有用于光耦合功能的光栅的第一定向耦合器的第一单元和具有光电转换功能的光电检测器和第二定向耦合器的第二单元 具有用于光耦合功能的光栅和半导体激光器，以及在光传播方向上与该单元平行延伸的公共光波导。 第一定向耦合器和光电检测器沿光传播方向串联布置并与公共光波导平行，并且第二定向耦合器和半导体激光器在光传播方向上串联布置并且与公共光波导平行。 当形成多个第一单元并且光栅具有不同的间距时，可以以相同的检测性能每个波长同时检测波长复用光信号。 当形成多个第二单元并且光栅具有不同的间距时，可以从公共波导的单个发射端发射不同波长的激光，并且半导体激光器可以被独立驱动。

公开(公告)号：US5088097A

公开(公告)日：1992-02-11

申请号：US504626

申请日：1990-04-04

申请人： Takeo Ono ,  Hajime Sakata

发明人： Takeo Ono ,  Hajime Sakata

IPC分类号： H01S3/1055 ,  H01S5/0625 ,  H01S5/12 ,  H01S5/125 ,  H01S5/50

CPC分类号： H01S3/1055 ,  H01S5/5045 ,  H01S5/06256 ,  H01S5/06258 ,  H01S5/12 ,  H01S5/125

摘要： A wavelength selective filter capable of changing a selected wavelength over a wide range, andd a method for driving such a filter. The wavelength selective filter has a substrate and an optical waveguide layer including a superlattice structure on the substrate. The optical waveguide layer includes a reflection portion and an optical waveguide portion which are juxtaposed in a light propagation direction. A diffraction grating is formed in the reflection portion of the optical waveguide layer, and an electrode is formed in the reflection portion for applying voltage.

摘要翻译： 一种能够在宽范围内改变选定波长的波长选择滤波器，以及用于驱动这种滤波器的方法。 波长选择滤光器具有基板和在基板上包括超晶格结构的光波导层。 光波导层包括在光传播方向上并列的反射部和光波导部。 衍射光栅形成在光波导层的反射部分中，并且电极形成在用于施加电压的反射部分中。

公开(公告)号：US4729640A

公开(公告)日：1988-03-08

申请号：US782558

申请日：1985-10-01

申请人： Hajime Sakata

发明人： Hajime Sakata

IPC分类号： G02F1/1333 ,  G02F1/13 ,  G02B5/18

CPC分类号： G02F1/133371 ,  G02F2201/305 ,  G02F2203/22

摘要： A liquid crystal light modulation device conprises a pair of substrates at least one of which is transparent, a diffraction grating formed between or on at least one of the substrates, a liquid crystal arranged between fine grooves of the diffraction grating, and control means for changing the orientation of the liquid crystal which has been oriented in a predetermined state by the grooves of the diffraction grating.

摘要翻译： 液晶光调制装置具有一对基板，其中至少一个是透明的，形成在至少一个基板之间或之上的衍射光栅，布置在衍射光栅的细槽之间的液晶，以及用于改变 通过衍射光栅的凹槽在预定状态下取向的液晶的取向。

公开(公告)号：US07411992B2

公开(公告)日：2008-08-12

申请号：US11120950

申请日：2005-05-04

申请人： Yukio Furukawa ,  Hajime Sakata ,  Kazunari Fujii

发明人： Yukio Furukawa ,  Hajime Sakata ,  Kazunari Fujii

IPC分类号： H01S3/08

CPC分类号： H01S5/06256 ,  H01S5/005 ,  H01S5/0092 ,  H01S5/02248 ,  H01S5/0617 ,  H01S5/06804

摘要： A light wavelength converting apparatus includes a semiconductor laser having gain, phase, and DBR regions, a nonlinear optical device for receiving fundamental-wave light emitted from the semiconductor laser and outputting second harmonic wave light, a first optical detector for monitoring output of the fundamental-wave light, a second optical detector for monitoring the second harmonic wave light, and a control portion for controlling a drive current for driving the semiconductor laser. The control portion includes a control parameter determiner and wavelength controller. The control parameter determiner changes a DBR current supplied to the DBR region and a phase current supplied to the phase region to obtain a changing point, and determines a control parameter for controlling the DBR and phase currents such that the relationship therebetween is not located on the changing point. The wavelength controller controls the DBR and phase currents pursuant to the control parameter.

摘要翻译： 光波长转换装置包括具有增益，相位和DBR区域的半导体激光器，用于接收从半导体激光器发射的基波并输出二次谐波光的非线性光学装置，用于监视基波的输出的第一光学检测器 波光，用于监测二次谐波光的第二光检测器，以及用于控制用于驱动半导体激光器的驱动电流的控制部分。 控制部分包括控制参数确定器和波长控制器。 控制参数确定器改变提供给DBR区域的DBR电流和提供给相位区域的相电流以获得改变点，并且确定用于控制DBR和相电流的控制参数，使得它们之间的关系不位于 变化点 波长控制器根据控制参数控制DBR和相电流。

公开(公告)号：US20050265419A1

公开(公告)日：2005-12-01

申请号：US11120951

申请日：2005-05-04

申请人： Kazunari Fujii ,  Hajime Sakata ,  Yukio Furukawa

发明人： Kazunari Fujii ,  Hajime Sakata ,  Yukio Furukawa

IPC分类号： G03B21/00 ,  H01S3/10 ,  H01S5/00 ,  H01S5/06 ,  H01S5/0625 ,  H01S5/068 ,  H01S5/0683 ,  H01S5/125 ,  H04N9/31

CPC分类号： H04N9/3129 ,  H01S5/005 ,  H01S5/0092 ,  H01S5/06256 ,  H01S5/06804

摘要： A distributed Bragg reflection (DBR) semiconductor laser is controlled in an image projecting apparatus. The image projecting apparatus includes the DBR semiconductor laser which is provided with a phase region and a DBR region, a light wavelength converting device for converting fundamental-wave light emitted from the DBR semiconductor laser into second harmonic wave light, an optical deflector for scanning the second harmonic wave in a one-dimensional or two-dimensional manner, and a modulating portion for modulating the DBR semiconductor laser based on an image signal. In the control method, a coefficient calculating step and a wavelength adjusting step are performed within a non-drawing time during which a drawing signal, which corresponds to the image signal, is absent. In the coefficient calculating step, at least one coefficient in a relationship between a DBR current to be injected into the DBR region and a phase current to be injected into the phase region for continuously shifting the wavelength of the fundamental-wave light is calculated. In the wavelength adjusting step, the DBR current injected into the DBR region and the phase current injected into the phase region are changed based on the relationship such that the second harmonic wave light is adjusted.

摘要翻译： 在图像投影装置中控制分布式布拉格反射（DBR）半导体激光器。 图像投影装置包括具有相位区域和DBR区域的DBR半导体激光器，用于将从DBR半导体激光器发射的基波光转换为二次谐波光的光波长转换装置，用于扫描 一维或二维二次谐波，以及用于基于图像信号调制DBR半导体激光器的调制部分。 在控制方法中，系数计算步骤和波长调整步骤在不存在对应于图像信号的绘制信号的非绘制时间内执行。 在系数计算步骤中，计算要注入到DBR区域的DBR电流和要注入到用于连续移位基波的波长的相位区域的相电流之间的关系中的至少一个系数。 在波长调整步骤中，根据调整二次谐波光的关系，改变注入DBR区域的DBR电流和注入相位区域的相电流。

公开(公告)号：US6154302A

公开(公告)日：2000-11-28

申请号：US191534

申请日：1998-11-13

申请人： Takayuki Yagi ,  Hajime Sakata ,  Etsuro Kishi

发明人： Takayuki Yagi ,  Hajime Sakata ,  Etsuro Kishi

IPC分类号： G02B26/08

CPC分类号： G02B26/0816

摘要： A light deflection device includes a deflection member having a sphere body enclosing a deflection face portion for deflecting a light beam, or a segmental sphere body having the deflection face portion and a segmental sphere face opposing to the deflection face portion. The device also includes a supporting member for supporting the deflection member in a turnable manner, and a driver for turning the deflection member. The driver is provided on the sphere face of the deflection member, and at a position opposing the sphere face or the segmental sphere face of the deflection member to apply a driving force to the sphere face or the segmental face. In one embodiment, a light deflection device array includes the arrangement of light deflection devices in a one-dimensional or two-dimensional array.

摘要翻译： 光偏转装置包括具有包围用于偏转光束的偏转面部分的球体的偏转构件或具有偏转面部分的节段球体和与偏转面部分相对的节段球面。 该装置还包括用于以可转动的方式支撑偏转构件的支撑构件和用于转动偏转构件的驱动器。 驱动器设置在偏转构件的球面上，并且在与偏转构件的球体面或节段球面相对的位置处，以向球面或节段面施加驱动力。 在一个实施例中，光偏转装置阵列包括一维或二维阵列中的光偏转装置的布置。

公开(公告)号：US5878066A

公开(公告)日：1999-03-02

申请号：US904448

申请日：1997-07-31

申请人： Natsuhiko Mizutani ,  Hajime Sakata ,  Yukio Furukawa

发明人： Natsuhiko Mizutani ,  Hajime Sakata ,  Yukio Furukawa

IPC分类号： H01S5/062 ,  H01S5/0625 ,  H01S5/10 ,  H01S5/12 ,  H01S5/20 ,  H01S5/227 ,  H01S5/32 ,  H01S5/34 ,  H01S5/343 ,  H01S5/50 ,  H01S3/10

CPC分类号： B82Y20/00 ,  H01S5/0625 ,  H01S5/12 ,  H01S2301/14 ,  H01S5/06203 ,  H01S5/06236 ,  H01S5/1057 ,  H01S5/106 ,  H01S5/1064 ,  H01S5/1215 ,  H01S5/1225 ,  H01S5/124 ,  H01S5/204 ,  H01S5/227 ,  H01S5/2275 ,  H01S5/3201 ,  H01S5/3404 ,  H01S5/3413 ,  H01S5/34306 ,  H01S5/3434 ,  H01S5/5009 ,  H01S5/5018

摘要： An optical semiconductor apparatus includes at least two semiconductor laser portions each having a light waveguide with an active layer and a distributed reflector, and a stimulating unit for independently stimulating the active layers of the light waveguides. The semiconductor laser portions are serially arranged in a light propagation direction. The light waveguides are constructed such that a difference between propagation constants for two different polarization modes in one of the waveguides is different from a difference between propagation constants for the two different polarization modes in the other of the waveguides. When one of injection of a modulation current signal into or application of a modulation voltage to the optical semiconductor apparatus, an oscillation state can be switched between a state in which Bragg wavelengths for one of the two different polarization modes coincide with each other between the light waveguides and a state in which Bragg wavelengths for the other of the two different polarization modes coincide with each other between the light waveguides.

摘要翻译： 光学半导体装置包括至少两个半导体激光器部分，每个半导体激光器部分具有有源层的光波导和分布反射器，以及用于独立地激发光波导的有源层的刺激单元。 半导体激光器部分沿光传播方向串联布置。 光波导被构造成使得波导中的一个中的两个不同偏振模式的传播常数之间的差异不同于另一个波导中两种不同偏振模式的传播常数之差。 当将调制电流信号注入或向光半导体装置施加调制电压中的一个时，可以在两个不同偏振模式中的一个的布拉格波长在光之间彼此重合的状态之间切换振荡状态 波导和两个不同偏振模式中的另一个的布拉格波长在光波导之间彼此重合的状态。

公开(公告)号：US5333216A

公开(公告)日：1994-07-26

申请号：US120234

申请日：1993-09-14

申请人： Hajime Sakata ,  Hitoshi Oda

发明人： Hajime Sakata ,  Hitoshi Oda

IPC分类号： G02B6/12 ,  G02B6/124 ,  H01S5/026 ,  H01S5/10 ,  H01S5/12 ,  H01S5/34 ,  H01S5/50 ,  G02B6/00 ,  G02B6/36

CPC分类号： H01S5/1032 ,  G02B6/12007 ,  G02B6/124 ,  H01S5/5045 ,  G02B2006/12107 ,  G02B2006/12109 ,  G02B2006/12147 ,  H01S5/0264 ,  H01S5/1035 ,  H01S5/1225 ,  H01S5/3428

摘要： An optical device comprises a substrate, a first guiding layer having a guided mode provided on the substrate, a second guiding layer laminated with the first guiding layer on the substrate, the second guiding layer having a guided mode different from that of the first guiding layer, and a diffraction grating provided on an area where the first and second guiding layers have their guided modes overlapping, the diffraction grating serving to couple the light on the specific range of wavelengths that propagate through the first guiding layer, with the second layer, wherein the diffraction grating comprises a high refractive index region and a low refractive index region disposed periodically in the propagation direction of light, the ratio of the high refractive index region to the low refractive index region occupied in one period changing gradually in the propagation direction of light.

摘要翻译： 光学装置包括基板，具有设置在基板上的引导模式的第一引导层，与基板上的第一引导层层压的第二引导层，第二引导层具有与第一引导层不同的引导模式 以及设置在第一和第二引导层具有其引导模式的区域上的衍射光栅，所述衍射光栅用于将通过第一引导层传播的特定波长范围的光耦合到第二层，其中 衍射光栅包括在光的传播方向周期性地设置的高折射率区域和低折射率区域，在一个周期中占据的高折射率区域与低折射率区域的比率在光的传播方向上逐渐变化 。