公开(公告)号：US07274010B2

公开(公告)日：2007-09-25

申请号：US11217590

申请日：2005-08-31

申请人： Kyoko Matsuda ,  Toshiyuki Okumura

发明人： Kyoko Matsuda ,  Toshiyuki Okumura

IPC分类号： H01J43/00 ,  H01L31/00 ,  H01S3/00

CPC分类号： H01S5/50 ,  H01L31/101 ,  H01S5/0601 ,  H01S5/5027 ,  H03F3/08

摘要： A semiconductor optical amplifier device includes an active layer, an n-type InP substrate, an n-type InP clad layer, a p-type InP clad layer, p-electrodes and n-electrodes. The active layer is made of, e.g., InGaAsP, and includes a saturable absorption region and optical amplification regions. A common modulated current is injected into each optical amplification region through the p-electrode. A modulated current is injected into the saturable absorption region through the p-electrode independently of the optical amplification region. The active layer receives injection light produced by adding additional noise light to an externally applied light signal, and emits output light produced by amplifying the injection light.

摘要翻译： 半导体光放大器装置包括有源层，n型InP衬底，n型InP包覆层，p型InP覆盖层，p电极和n电极。 有源层由例如InGaAsP制成，并且包括饱和吸收区域和光学放大区域。 普通的调制电流通过p电极注入每个光放大区域。 调制电流通过p电极而不依赖于光放大区域而注入可饱和吸收区域。 有源层接收通过向外部施加的光信号增加附加噪声光而产生的注入光，并且发射通过放大注入光产生的输出光。

公开(公告)号：US07251390B2

公开(公告)日：2007-07-31

申请号：US11497691

申请日：2006-08-01

申请人： Yasuo Fukai ,  Toshiyuki Okumura

发明人： Yasuo Fukai ,  Toshiyuki Okumura

IPC分类号： G02B6/12

CPC分类号： G02B6/12007 ,  G02B6/136 ,  G02F1/0147 ,  G02F1/025 ,  G02F1/313

摘要： An OBO planar waveguide device includes an Si substrate, an SiO2 layer formed on the Si substrate, and a plurality of Si optical waveguides provided on the Si substrate in parallel to each other. A heater and a heat sink are provided on opposing side end portions of the Si substrate respectively. As a result of a function of the heater and the heat sink, gradient of temperature distribution of the Si substrate is formed in a direction in which the plurality of Si optical waveguides are aligned. Thermal resistance of the Si substrate in the direction in which the gradient of temperature distribution is formed is greater than 20 K/W and lower than 2000 K/W. The OBO planar waveguide device attaining reduced power consumption is thus obtained.

摘要翻译： OBO平面波导器件包括Si衬底，在Si衬底上形成的SiO 2层以及在Si衬底上彼此平行地设置的多个Si光波导。 分别在Si衬底的相对的侧端部上设置加热器和散热器。 作为加热器和散热器的功能的结果，Si衬底的温度分布的梯度在多个Si光波导对准的方向上形成。 在形成温度分布的梯度的方向上的Si衬底的热阻大于20K / W且低于2000K / W。 从而获得降低功耗的OBO平面波导装置。

公开(公告)号：US07088902B2

公开(公告)日：2006-08-08

申请号：US10853249

申请日：2004-05-26

申请人： Yoshimichi Katoh ,  Toshiyuki Okumura

发明人： Yoshimichi Katoh ,  Toshiyuki Okumura

IPC分类号： G02B6/02 ,  G02B6/28 ,  G02B6/32 ,  G02B6/36 ,  G02B6/10 ,  G02B6/00 ,  H01L21/00

CPC分类号： B82Y20/00 ,  G02B6/1225

摘要： A photonic crystal and a producing method thereof are provided. The photonic crystal includes at least two media of different refractive indices formed on a semiconductor substrate. One of the media is periodically arranged in another one of the media. The photonic crystal has a cleaved surface on its side. The directions of primitive translation vectors representing the periodic arrangement directions of the one medium are at desired angles with the cleaved surface. Preferably, the direction of at least one of the primitive translation vectors is in parallel with the cleaved surface.

摘要翻译： 提供了一种光子晶体及其制造方法。 光子晶体包括形成在半导体衬底上的至少两种不同折射率的介质。 其中一个媒体定期安排在另一个媒体中。 光子晶体在其侧面具有裂开的表面。 表示一个介质的周期排列方向的原始平移向量的方向与切割的表面处于期望的角度。 优选地，原始翻译向量中的至少一个的方向与切割的表面平行。

公开(公告)号：US06787384B2

公开(公告)日：2004-09-07

申请号：US10653810

申请日：2003-09-03

申请人： Toshiyuki Okumura

发明人： Toshiyuki Okumura

IPC分类号： H01L2100

CPC分类号： G02B6/29395 ,  B81B2201/047 ,  B81C1/00238 ,  B81C3/001 ,  B81C2201/019 ,  G02B6/12007 ,  G02B6/29358 ,  G02B6/29361 ,  G02B6/29362 ,  G02B6/3518 ,  G02B6/352 ,  G02B6/3546 ,  G02B6/3556 ,  G02B6/356 ,  G02B6/357 ,  G02B6/3584 ,  G02B6/3588 ,  G02B6/3594 ,  G02B26/001 ,  G02B26/0833 ,  G02B26/0841 ,  G02B2006/12104 ,  H01L2924/0002 ,  H01L2924/00

摘要： A driver circuit substrate is prepared and a mirror substrate is so provided as to be placed on the driver circuit substrate. Nine mirror elements are lad out on the mirror substrate in a 3×3 matrix form. The mirror elements are prepared by a microelectromechanical system (MEMS). An insulating substrate is provided on the driver circuit substrate and a driver circuit which drives a light reflecting mirror element is provided on the insulating substrate. The driver circuit substrate is connected to the mirror substrate via a resin layer of a thermosetting adhesive or the like.

摘要翻译： 制备驱动器电路基板，并且设置反射镜基板以放置在驱动电路基板上。 九个镜子元素以3×3矩阵形式在镜子基板上出射。 镜子元件由微机电系统（MEMS）制备。 在驱动电路基板上设置绝缘基板，在绝缘基板上设置驱动光反射镜元件的驱动电路。 驱动电路基板经由热固性粘合剂等的树脂层与镜面基板连接。

公开(公告)号：US06764870B2

公开(公告)日：2004-07-20

申请号：US10219165

申请日：2002-08-13

申请人： Toshiyuki Okumura

发明人： Toshiyuki Okumura

IPC分类号： H01L2118

CPC分类号： B82Y20/00 ,  H01S5/0602 ,  H01S5/0658 ,  H01S5/22 ,  H01S5/2219 ,  H01S5/2222 ,  H01S5/2231 ,  H01S5/34333

摘要： A gallium nitride type semiconductor laser device includes: a substrate; and a layered structure formed on the substrate. The layered structure at least includes an active layer of a nitride type semiconductor material which is interposed between a pair of nitride type semiconductor layers each functioning as a cladding layer or a guide layer. A current is injected into a stripe region in the layered structure having a width smaller than a width of the active layer. The width of the stripe region is in a range between about 0.2 &mgr;m and about 1.8 &mgr;m.

摘要翻译： 氮化镓型半导体激光器件包括：基板; 以及形成在基板上的分层结构。 层状结构至少包括氮化物型半导体材料的有源层，其介于一对氮化物型半导体层之间，各自用作包覆层或引导层。 将电流注入到具有小于有源层的宽度的宽度的层状结构中的条带区域中。 条纹区域的宽度在约0.2μm至约1.8μm之间的范围内。

公开(公告)号：US06714719B1

公开(公告)日：2004-03-30

申请号：US09438951

申请日：1999-11-12

申请人： Toshiyuki Okumura

发明人： Toshiyuki Okumura

IPC分类号： H04N591

CPC分类号： G11B20/1883 ,  G11B27/36 ,  G11B2020/10759 ,  G11B2020/10944 ,  G11B2020/1893 ,  G11B2220/20 ,  H04N5/781 ,  H04N5/782

摘要： A video recording/reproduction system is equipped with a magnetic disk drive, which records and reproduces video data on a magnetic disk by driving a magnetic head. Herein, the magnetic disk drive is controlled by a CPU in accordance with control programs, while a host machine is provided to perform a variety of controls regarding recording and reproduction in accordance with commands being given by manipulation of an operation panel. The magnetic disk drive is characterized by performing a reassignment process and/or calibration such as to suppress reduction of throughput of video data. That is, if the CPU fails to access a target sector of the magnetic disk so that the target sector is regarded as a defect sector, the CPU makes a decision whether to perform the reassignment process based on transfer speeds and vacant capacity of a buffer memory built in the magnetic disk drive. If transferring data of the host machine overflow the buffer memory by execution of the reassignment process, the CPU temporarily refuges the data to a storage, then, after completion of recording or reproduction, the CPU performs the reassignment process again. Further, the magnetic disk drive performs calibration only when a time margin between a present time and a start time of reserved recording is greater that a calibration time. Thus, it is possible to avoid occurrence of breaks by which pictures being recorded or reproduced are interrupted intermittently. So, it is possible to improve reliability and picture quality in recording and reproduction.

摘要翻译： 视频记录/再现系统配备有磁盘驱动器，其通过驱动磁头来在磁盘上记录和再现视频数据。 这里，根据控制程序，由CPU控制磁盘驱动器，同时提供主机以根据操作面板的操作给出的命令执行关于记录和再现的各种控制。 磁盘驱动器的特征在于执行重新分配处理和/或校准，以便抑制视频数据的吞吐量的降低。 也就是说，如果CPU无法访问磁盘的目标扇区，使得目标扇区被视为缺陷扇区，则CPU基于缓冲存储器的传送速度和空闲容量来决定是否执行重新分配处理 内置在磁盘驱动器中。 如果通过执行重新分配处理来传送主机的数据溢出缓冲存储器，则CPU暂时将数据保存到存储器中，然后在完成记录或再现之后，CPU再次执行重新分配处理。 此外，仅当当前时间与预约记录的开始时间之间的时间裕度大于校准时间时，磁盘驱动器才执行校准。 因此，可以避免间歇地断开记录或再现的图像的断裂的发生。 因此，可以提高记录和再现的可靠性和图像质量。

公开(公告)号：US06614824B2

公开(公告)日：2003-09-02

申请号：US09950576

申请日：2001-09-13

申请人： Yuhzoh Tsuda ,  Shigetoshi Ito ,  Toshiyuki Okumura

发明人： Yuhzoh Tsuda ,  Shigetoshi Ito ,  Toshiyuki Okumura

IPC分类号： H01S500

CPC分类号： B82Y20/00 ,  H01S5/22 ,  H01S5/34333 ,  H01S2301/04

摘要： A nitride semiconductor laser device having a low threshold current and low noise is provided. The laser device includes n-type and p-type layers made of nitride semiconductor and formed on a substrate, and a light emitting layer between the n-type and p-type layers. The light emitting layer is formed of a well layer or a combination of well and barrier layers. At least the well layer is made of nitride semiconductor containing element X, N and Ga, wherein element is at least one selected from the group consisting of As, P and Sb. The atomic fraction of element X is smaller than that of N. A maximum width through which current is injected into the light emitting layer via the p-type layer is from 1.0 &mgr;m to 4.0 &mgr;m.

公开(公告)号：US6157507A

公开(公告)日：2000-12-05

申请号：US162509

申请日：1998-09-29

申请人： Takahiro Korenari ,  Toshiyuki Okumura

发明人： Takahiro Korenari ,  Toshiyuki Okumura

IPC分类号： G11B5/00 ,  G11B5/02 ,  G11B5/09 ,  G11B5/39 ,  G11B5/455 ,  G11B20/10

CPC分类号： G11B5/455 ,  G11B5/09 ,  G11B20/10009 ,  G11B2005/0016

摘要： A performance evaluation method of an MR head whereby resolution performance of an MR head can be estimated, an isolated repreoduction wave form V(t) of the MR head is approximated by an equation V(t)=1/(1+(2t/PW50).sup.P), t denoting time difference from a timing which gives a peak value of the isolated reproduction wave form V(t), and PW50 denoting a half-peak-width where the isolated reproduction wave form V(t) shows more than 50% of the peak value. The resolution performance of the MR head is evaluated according to the order value P of the above equation which gives the most likelihood approximation of the isolated wave form, together with the half-peak-width PW50 relative to a minimum bit-interval to be reproduced by the MR head.

摘要翻译： MR头的性能评估方法，其中可以估计MR头的分辨率性能，MR头的隔离反向波形V（t）由等式V（t）= 1 /（1+（2t / PW50）P），t表示给出隔离再现波形V（t）的峰值的定时的时间差，表示隔离再现波形V（t）的半峰宽的PW50表示超过 峰值的50％。 MR头的分辨率性能根据给出孤立波形的最可能近似的上述等式的阶数值P以及相对于要再现的最小位间隔的半峰宽PW50来评估 由MR主管。

公开(公告)号：US5658824A

公开(公告)日：1997-08-19

申请号：US521905

申请日：1995-08-31

申请人： Shigetoshi Itoh ,  Toshiyuki Okumura

发明人： Shigetoshi Itoh ,  Toshiyuki Okumura

IPC分类号： H01L33/06 ,  H01L33/12 ,  H01L33/14 ,  H01L33/28 ,  H01L33/44 ,  H01S5/00 ,  H01S5/22 ,  H01S5/223 ,  H01S5/327 ,  H01S5/347 ,  H01L21/203

CPC分类号： B82Y20/00 ,  H01S5/2231 ,  H01S5/327 ,  H01S5/22 ,  H01S5/2205 ,  H01S5/347

摘要： A semiconductor laser device includes: a lower cladding layer; an upper cladding layer having a bottom and a strip-shaped ridge portion projecting from the bottom; a II-VI compound semiconductor active layer interposed between the lower cladding layer and the upper cladding layer; and a burying blocking layer made of an aromatic polyamide resin formed on a bottom of the upper cladding layer so as to be in contact with sides of the stripe-shaped ridge portion.

摘要翻译： 半导体激光装置包括：下包层; 具有底部的上包层和从底部突出的条形脊部; 插入在下包层和上包层之间的II-VI化合物半导体活性层; 以及形成在上包层的底部上以与条状脊部分的侧面接触的由芳族聚酰胺树脂制成的掩埋阻挡层。

公开(公告)号：US5448425A

公开(公告)日：1995-09-05

申请号：US259349

申请日：1994-06-14

申请人： Toshiyuki Okumura

发明人： Toshiyuki Okumura

IPC分类号： G11B5/187 ,  G11B5/008 ,  G11B5/024 ,  G11B5/265 ,  G11B5/03

CPC分类号： G11B5/024 ,  G11B5/0086

摘要： A method for erasing information recorded on a magnetic tape by a magnetic erase head having a magnetic core having a magnetic gap of a predetermined width and a coil wound on the core. An erasing current is flown through the coil to generate an erasing magnetic field above the magnetic gap. The magnetic field generated by that current has a profile defined by a first zero point, first and second peak points, and a second zero point above the magnetic erase head. The magnetic tape having information recorded therein through the magnetic field is moved above the magnetic erase head. The frequency of the erasing current and a moving speed of the magnetic tape relative to the magnetic erase head are set such that the magnetic field changes in phase at least three times during a time in which the magnetic tape is moved in a moving direction of the magnetic tape by a distance which is determined by the first zero point and the first peak point of the magnetic field profile.

摘要翻译： 一种用于通过具有具有预定宽度的磁隙的磁芯的磁性擦除头擦除记录在磁带上的信息的方法和缠绕在芯上的线圈。 擦除电流流过线圈，以在磁隙上方产生擦除磁场。 由该电流产生的磁场具有由第一零点，第一和第二峰值点以及磁性擦除头上方的第二零点限定的轮廓。 具有通过磁场记录在其中的信息的磁带移动到磁性擦除头的上方。 擦除电流的频率和磁带相对于磁性擦除头的移动速度被设定为使磁场在磁带沿着移动方向移动的时间内相位变化至少三次 磁带的距离由磁场分布的第一个零点和第一个峰值确定。