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    Semiconductor optical device and integration type optical semiconductor device
    43.
    发明专利
    Semiconductor optical device and integration type optical semiconductor device 审中-公开
    半导体光学器件和集成型光学半导体器件

    公开(公告)号：JP2003069153A

    公开(公告)日：2003-03-07

    申请号：JP2001259141

    申请日：2001-08-29

    Applicant: Hitachi Ltd ,  株式会社日立製作所

    Inventor： NAKAHARA KOJI ,  SUDO TSUTOMU

    IPC: G02B6/122 ,  G02F1/017 ,  G02F1/025 ,  H01S5/026 ,  H01S5/042 ,  H01S5/062 ,  H01S5/0625 ,  H01S5/20 ,  H01S5/22 ,  H01S5/223 ,  H01S5/34

    CPC classification number: H01S5/22 ,  H01S5/0425 ,  H01S5/06226 ,  H01S5/06256 ,  H01S5/2081

    Abstract: PROBLEM TO BE SOLVED: To achieve a high-speed and reliable structure in a ridge type semiconductor optical device. SOLUTION: The semiconductor optical device apparatus has a structure where a conductive block structure is provided at one portion of a rectangular bottom section in a ridge type semiconductor optical device where both the sides of a mesa stripe are dug in a rectangular shape by depth that does not reach an active layer. The conductive block structure is achieved by a structure where the ion implantation of impurities is made to, for example, a channel or a semiconductor.

    Abstract translation: 要解决的问题：为了在脊型半导体光学器件中实现高速可靠的结构。 解决方案：半导体光学器件装置具有在脊型半导体光学器件中的矩形底部的一部分处设置导电块结构的结构，其中台阶条的两侧被切成矩形形状，深度为 没有达到活动层。 导电块结构通过将杂质离子注入例如沟道或半导体的结构来实现。

    Semiconductor laser
    44.
    发明专利
    Semiconductor laser 有权
    半导体激光器

    公开(公告)号：JP2003046190A

    公开(公告)日：2003-02-14

    申请号：JP2001228866

    申请日：2001-07-30

    Applicant: Hitachi Ltd ,  株式会社日立製作所

    Inventor： AOKI MASAHIRO

    IPC: G02B6/14 ,  G02B6/12 ,  G02B6/122 ,  H01S5/02 ,  H01S5/026 ,  H01S5/062 ,  H01S5/0625 ,  H01S5/10 ,  H01S5/125 ,  H01S5/22

    CPC classification number: H01S5/22 ,  H01S5/0203 ,  H01S5/0264 ,  H01S5/0265 ,  H01S5/06256 ,  H01S5/0655 ,  H01S5/1064 ,  H01S5/125 ,  H01S2301/185

    Abstract: PROBLEM TO BE SOLVED: To provide an element structure that can realize a short resonator laser which can be operated at a high speed with a low-threshold current or a wavelength tunable laser which is excellent in wavelength stability, and to provide a method of manufacturing the structure. SOLUTION: In a partial portion or the whole portion of the waveguide of the short resonator of the short resonator laser, the width of the waveguide is set to a lateral multi-mode permissible width. In this way, the element structure that can improve the gain of the short resonator laser and can reduce the electric resistance and thermal resistance of the laser while the characteristics of the laser are maintained is devised. In this case, the mode conversion loss in the laser resonator can be reduced by utilizing a self-image forming effect based on a multi-mode interference effect and, in addition, the light emitting edge of the laser becomes an ideal structure for the connection with an optical fiber, etc., because the light intensity distribution at the emitting edge becomes the lowest-order mode having a single peak. In addition, a method by which a laser resonator containing a multi-mode interference waveguide section can be manufactured with high dimensional accuracy by using both lithography and dry etching is also devised.

    Abstract translation: 要解决的问题：提供一种能够实现能够以波长稳定性优异的低阈值电流或波长可调谐激光器高速运转的短谐振器激光器的元件结构，并提供制造方法 结构。 解决方案：在短谐振器激光器的短谐振器的波导的局部或整个部分中，将波导的宽度设定为横向多模允许宽度。 以这种方式，设计了可以改善短谐振器激光器的增益并且可以在保持激光器的特性的同时降低激光器的电阻和热阻的元件结构。 在这种情况下，通过利用基于多模式干涉效应的自图像形成效果，可以降低激光谐振器中的模式转换损耗，另外，激光的发光边缘成为连接的理想结构 由于发射边缘处的光强分布变为具有单峰的最低阶模式，所以具有光纤等。 此外，还设计了通过使用光刻和干蚀刻二者均可以通过使用高尺寸精度制造包含多模干涉波导部分的激光谐振器的方法。

    INTEGRATED TUNABLE LASER
    46.
    发明专利
    INTEGRATED TUNABLE LASER 审中-公开

    公开(公告)号：JP2002353556A

    公开(公告)日：2002-12-06

    申请号：JP2002134558

    申请日：2002-05-09

    Applicant: AGILENT TECHNOLOGIES INC

    Inventor： STEFFENS WOLF

    IPC: H01S5/026 ,  H01S5/0625 ,  H01S5/10 ,  H01S5/12

    Abstract: PROBLEM TO BE SOLVED: To provide a laser structure by which a wavelength is made tunable over a wide wavelength range, and which can be manufactured easily. SOLUTION: The integrated laser structure comprises a first segment (1), a second segment (3) and a third segment (4) on a substrate composed of a semiconductor material; the first segment (2) amplifies light waves resonating in the laser structure, and it provides a filter for a low-selectivity interferometer; the second segment (3) continuously fine tunes and phase-adjusts the light waves; the third segment (4) provides reflection of the light waves in a wavelength selection manner. Respective segments are constituted, in such a way that a current is injected, where the current into the first segment (2) causes the wavelength shift of the low-selective interferometric filter, where the current into the second segment (3) causes the wavelength shift of a resonator mode, and where the current into the third segment (4) causes wavelength shift of the reflection of the wavelength selective reflection.

    WAVELENGTH MULTIPLEX OPTICAL COMMUNICATION SYSTEM AND ITS METHOD
    49.
    发明专利
    WAVELENGTH MULTIPLEX OPTICAL COMMUNICATION SYSTEM AND ITS METHOD 失效

    公开(公告)号：JP2002033706A

    公开(公告)日：2002-01-31

    申请号：JP2000217549

    申请日：2000-07-18

    Applicant: ATR ADAPTIVE COMM RES LAB

    Inventor： RIYUU UN ,  PETER DAVIS

    IPC: H01S5/0625 ,  G09C1/00 ,  H04B10/516 ,  H04B10/54 ,  H04B10/564 ,  H04B10/572 ,  H04B10/588 ,  H04B10/61 ,  H04J14/00 ,  H04J14/02 ,  H04B10/152 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142

    Abstract: PROBLEM TO BE SOLVED: To provide a wavelength multiplex optical communication system that has a simpler configuration and a simpler adsjustment method than those of a conventional system and can transmit a multiplexed data signal. SOLUTION: An optical chaos signal wavelength hopping generator 101 of an optical transmitter 100 is provided with a DBR type laser diode device 10a that can oscillate lights of a plurality of wavelengths, the optical transmitter 100 generates an optical chaos signal which acts as an optical reference signal through mode hopping between two wavelengths λ1, λ2 and modulates the optical chaos signal having the two wavelengths λ1, λ2 with a received data signal and transmits the modulated chaos signal to an optical receiver 200. The optical receiver 200 is provided with an optical chaos signal wavelength hopping generator 201 similar to the optical chaos signal wavelength hopping generator 101, the optical receiver 200 injects the received optical chaos signal to the optical chaos signal wavelength hopping generator 201 to extract a synchronized optical chaos signal and use it for a reference signal, and demodulates the received optical chaos signal by using the reference signal.

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