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    • 71. 发明授权
    • Semiconductor laser drive device, semiconductor laser drive method, light transmission device, optical wiring module, and electronic device
    • 半导体激光驱动装置,半导体激光驱动方法,光传输装置,光配线模块和电子装置
    • US08457499B2
    • 2013-06-04
    • US12672763
    • 2008-08-08
    • Kentaro HamanaAkira EnamiYukari TerakawaKeisuke UnoHayami Hosokawa
    • Kentaro HamanaAkira EnamiYukari TerakawaKeisuke UnoHayami Hosokawa
    • H04B10/12H01S3/13H01S3/00
    • H01S5/06804H01S5/183
    • A semiconductor laser drive apparatus comprises a bias current setting section (232) which sets a bias current value on the basis of the drive temperature so that the temperature characteristic of the bias current value with respect to the drive temperature may be a linear function having a slope except zero and a drive current setting section (233) for setting the drive current value on the basis of the drive temperature so that the temperature characteristic of the drive current value with respect to the drive temperature may be a function having a slope except zero. The temperature characteristic of the bias current and that of the drive current are functions different from each other. With this, low cost, space-saving, and power-saving of a semiconductor laser are achieved, and a semiconductor laser drive apparatus enabling a good transmission characteristic on the reception side and a high optical output over the whole drive temperature range when driving the semiconductor laser can be provided.
    • 半导体激光器驱动装置包括偏置电流设定部(232),该偏置电流设定部(232)根据驱动温度设定偏置电流值,使得偏置电流值相对于驱动温度的温度特性可以是具有 除了零以外的斜坡以及用于根据驱动温度设定驱动电流值的驱动电流设定部(233),使得驱动电流值相对于驱动温度的温度特性可以是除了零之外的斜率的函数 。 偏置电流的温度特性和驱动电流的温度特性相互不同。 由此,实现了半导体激光器的低成本,节省空间和省电,并且在驱动了半导体激光器时,在整个驱动温度范围内能够在接收侧具有良好的传输特性和高的光输出 可以提供半导体激光器。
    • 72. 发明授权
    • Optical waveguide, optical waveguide module, and electronic apparatus
    • 光波导,光波导模块和电子设备
    • US08457455B2
    • 2013-06-04
    • US12530793
    • 2008-03-14
    • Yukari TerakawaHayami Hosokawa
    • Yukari TerakawaHayami Hosokawa
    • G02B6/42G02B6/02
    • G02B6/4214G02B6/43
    • A light guide includes a core and a clad made of a material having an index of refraction different from an index of refraction of the core and covering the core, in which at least one of a light incident surface or a light exit surface of the core is arranged while shifted in parallel without changing respective inclined angles so that the inclined surface is divided into a plurality of inclined surfaces parallel in a longitudinal direction (X direction) of the rectangular shape in the orthogonal projection and the plurality of inclined surfaces closer to the light emitting portion are positioned in a direction (Z direction) of moving away from the end face to be in a shape extending in the direction (Z direction) of moving away from the end face in a stepwise manner as a whole.
    • 光导包括芯和由折射率不同于芯的折射率并覆盖芯的材料制成的包层,其中芯的光入射表面或光出射表面中的至少一个 被布置成平行移动而不改变相应的倾斜角度,使得倾斜表面被分成在正交突起中在矩形的纵向(X方向)上平行的多个倾斜表面,并且多个倾斜表面更靠近 发光部分沿着从端面移动的方向(Z方向)定位成整体上沿着从端面远离的方向(Z方向)延伸的形状。
    • 73. 发明授权
    • Optical transmission module and electronic device
    • 光传输模块和电子设备
    • US08380062B2
    • 2013-02-19
    • US12594725
    • 2008-04-03
    • Keisuke UnoYoshihisa IshidaAkira EnamiHayami Hosokawa
    • Keisuke UnoYoshihisa IshidaAkira EnamiHayami Hosokawa
    • H04B17/00
    • H04B10/808H04B10/801
    • A light transmission module has a light transmitting unit having a light emitting portion for outputting an optical signal corresponding to a data signal input as an electrical signal, and a first power supply controller for controlling a drive power supply of the light emitting portion, a light transmission path for transmitting the optical signal introduced from the light transmitting unit, a light receiving unit having a light receiving portion for receiving the optical signal output from the light transmission path and outputting an electrical signal corresponding to the optical signal, and a second power supply controller for controlling a drive power supply of the light receiving portion, and at least one electrical transmission path, connecting the light transmitting unit and the light receiving unit, for transmitting a control signal for controlling power supply to the light emitting portion and the light receiving portion to the first power supply controller and the second power supply controller. The first power supply controller and the second power supply controller control the power supply to the light emitting portion and the light receiving portion based on the control signal input via the electrical transmission path.
    • 光传输模块具有光发射单元,该发光单元具有用于输出与作为电信号输入的数据信号相对应的光信号的发光部分,以及用于控制发光部分的驱动电源的第一电源控制器, 用于发送从光发射单元引入的光信号的传输路径;光接收单元,具有用于接收从光传输路径输出的光信号并输出​​与光信号对应的电信号的光接收部分;以及第二电源 用于控制光接收部分的驱动电源的控制器,以及连接光发射单元和光接收单元的至少一个电传输路径,用于发送用于控制向发光部分供电的控制信号和光接收 部分到第一电源控制器和第二电源 供应控制器。 第一电源控制器和第二电源控制器基于经由电传输路径输入的控制信号来控制对发光部分和光接收部分的电力供应。
    • 77. 发明授权
    • Optical pickup device with substantially mutually orthogonal reflection
surfaces
    • US5835472A
    • 1998-11-10
    • US62321
    • 1993-05-17
    • Noriyoshi HorieTatsuo OhgakiHayami HosokawaMasami TadaTsukasa Yamashita
    • Noriyoshi HorieTatsuo OhgakiHayami HosokawaMasami TadaTsukasa Yamashita
    • G11B7/12G11B7/135G11B11/105G11B7/00
    • G11B7/1356G11B7/124G11B7/1353G11B11/10543
    • An integrated optical pickup device for a magnetooptical recording medium (e.g. a magnetooptical recording disk) and/or an optical recording medium (e.g. an optical recording disk) in which a plurality of focusing grating couplers are formed on an optical waveguide layer manufactured on a substrate. A light reflected from a magnetooptical disk or an optical disk is guided by the focusing grating couplers into the waveguide layer to be separated and to be converged therethtough. The converged lights are detected so as to produce a tracking error signal, a focusing error signal, and an information readout signal. The plural focusing grating couplers are fabricated at an identical location on the waveguide in a superimposed fashion. This increases the utilization efficiency of reflection light per each unitary area of the focusing grating couplers and hence the signals are obtained in a stable state. Between a semiconductor laser and a collimation lens, there is formed a composite beam splitter having two reflection surfaces. Reflection lights from the magnetooptical disk are respectively reflected by these reflection surfaces and are then received by photosensors. Analyzers are disposed respectively on front sides of the photosensors. The analyzers respectively have polarization directions orthogonal to each other. Each photosensor includes three-partition photodiode. The beam sizing method and the push-pull detection methods are used for detecting the focusing and tracking errors. The optical pickup device can also used to read data from an optical disk. A prism is disposed between a semiconductor laser and a collimation lens. The prism has two reflection surfaces. Reflection lights from a magnetooptical disk are respectively reflected by these reflection surfaces to be received by photosensors. On front sides of the photosensors, there are respectively arranged analyzers respectively having polarization directions orthogonal to each other.