公开(公告)号：US6091745A

公开(公告)日：2000-07-18

申请号：US916231

申请日：1997-08-22

申请人： Jun Nitta

发明人： Jun Nitta

IPC分类号： H01S5/00 ,  H01S5/042 ,  H01S5/062 ,  H01S5/0625 ,  H01S5/12 ,  H01S3/102

CPC分类号： H01S5/0625 ,  H01S5/06236 ,  H01S5/124

摘要： In a semiconductor laser capable of changing its polarization mode, there are arranged a plurality of regions in its cavity direction and each region includes an active layer and a diffraction grating. The laser is driven by performing a control for switching the polarization mode to a region of the laser, out of the plurality of regions, where a refractive index is easier to be changed by a control than the other region.

摘要翻译： 在能够改变其偏振模式的半导体激光器中，在其空腔方向上布置有多个区域，并且每个区域包括有源层和衍射光栅。 通过在多个区域中执行用于将偏振模式切换到激光器的区域的控制来驱动激光器，其中折射率比通过其它区域的控制更容易改变。

公开(公告)号：US5926497A

公开(公告)日：1999-07-20

申请号：US816335

申请日：1997-03-13

申请人： Jun Nitta ,  Yuichi Handa ,  Hidetoshi Nojiri

发明人： Jun Nitta ,  Yuichi Handa ,  Hidetoshi Nojiri

IPC分类号： G02B5/18 ,  B82Y20/00 ,  G02B5/30 ,  H01S5/00 ,  H01S5/042 ,  H01S5/062 ,  H01S5/0625 ,  H01S5/12 ,  H01S5/32 ,  H04B10/40 ,  H04B10/50 ,  H04B10/508 ,  H04B10/532 ,  H04B10/572 ,  H04B10/58 ,  H04B10/60 ,  H01S3/19

CPC分类号： H01S5/0625 ,  H01S5/12 ,  H01S2301/14 ,  H01S5/06236 ,  H01S5/1228 ,  H01S5/3201 ,  H01S5/3216

摘要： A diffraction grating includes first regions for mainly reflecting first polarized light and second regions for mainly reflecting second polarized light. The first regions and the second regions are alternately arranged in a light propagation direction in a variety of manners to appropriately set its polarization-mode dependency according to need. An optical semiconductor device includes a semiconductor substrate, a laser structure and that diffraction grating formed in the laser structure. The laser structure is a distributed feedback semiconductor laser structure or a distributed Bragg reflector semiconductor laser structure formed on the semiconductor substrate.

摘要翻译： 衍射光栅包括用于主要反射第一偏振光的第一区域和用于主要反射第二偏振光的第二区域。 第一区域和第二区域以各种方式沿光传播方向交替布置，以根据需要适当地设定其偏振模式依赖性。 光学半导体器件包括半导体衬底，激光结构和形成在激光结构中的衍射光栅。 激光器结构是分布式反馈半导体激光器结构或在半导体衬底上形成的分布式布拉格反射器半导体激光器结构。

公开(公告)号：US5848085A

公开(公告)日：1998-12-08

申请号：US580975

申请日：1996-01-03

申请人： Jun Nitta

发明人： Jun Nitta

IPC分类号： G02F1/015 ,  B82Y10/00 ,  B82Y20/00 ,  H01L29/06 ,  H01L29/15 ,  H01S5/00 ,  H01S5/34 ,  H01S5/343 ,  H01S5/50 ,  H01S3/19

CPC分类号： H01L33/06 ,  B82Y20/00 ,  H01L29/155 ,  H01S5/34 ,  H01S5/5036 ,  H01L33/30 ,  H01S5/3403 ,  H01S5/34306 ,  H01S5/3434

摘要： A semiconductor quantum well structure having at least two quantum wells, each having an electron quantum level, a heavy hole quantum level and a light hole quantum level. In the two quantum wells, only their respective heavy hole quantum levels or their respective light hole quantum levels coincide with each other. Further, there is a construction in which a barrier portion between the two quantum wells has a thickness and a band gap which allow connecting the wave functions of the respective electrons between the two quantum wells. Alternatively, the thickness and band gap of the barrier allow the connection between the quantum wells of the wave functions of those holes whose quantum levels coincide with each other. In order to set the hole quantum level to a desired quantum level, a specific construction imparts an appropriate strain to the quantum wells.

摘要翻译： 一种具有至少两个量子阱的半导体量子阱结构，每个量子阱具有电子量子级，重孔量子级和光空穴量级。 在两个量子阱中，只有它们各自的重孔量子水平或它们各自的光空穴量子水平彼此一致。 此外，存在两个量子阱之间的势垒部分具有允许连接两个量子阱之间的各个电子的波函数的厚度和带隙的结构。 或者，屏障的厚度和带隙允许量子阱彼此之间的那些孔的波函数的量子阱之间的连接。 为了将空穴量子水平设定为期望的量子水平，特定的结构赋予量子阱适当的应变。

公开(公告)号：US5822352A

公开(公告)日：1998-10-13

申请号：US931938

申请日：1997-09-17

申请人： Natsuhiko Mizutani ,  Jun Nitta

发明人： Natsuhiko Mizutani ,  Jun Nitta

IPC分类号： H01S5/00 ,  H01S5/0625 ,  H01S5/20 ,  H01S5/50 ,  H01S3/19 ,  H01S3/23

CPC分类号： H01S5/5009 ,  H01S2301/14 ,  H01S5/0625

摘要： An optical semiconductor apparatus includes a single substrate, at least two semiconductor laser portions each having a semiconductor laser structure and a current injection unit for independently injecting currents into the at least two semiconductor laser portions. The semiconductor laser portions are serially arranged on the substrate in a light propagation direction and respectively includes waveguides having active layers, and layer-extending planes of the waveguides partially overlap and are not parallel to each other. The electric-field directions of TE modes in the respective semiconductor laser portions are parallel to the layer-extending planes of the waveguides, so that the non-parallel layer-extending planes of the waveguides can establish non-parallel TE modes in the respective semiconductor laser portions. In such an integrated optical semiconductor apparatus, such as an integrated semiconductor laser apparatus and an integrated semiconductor optical amplifier apparatus, the polarization mode dependency of gain can be controlled by unevenly injecting current into the semiconductor laser portions whose TE modes are not parallel to each other.

摘要翻译： 光学半导体装置包括：单个基板，至少两个半导体激光器部分，每个半导体激光器部分都具有半导体激光器结构;以及电流注入单元，用于独立地将电流注入至少两个半导体激光器部分。 半导体激光器部分在光传播方向上串联地布置在基板上，并且分别包括具有有源层的波导，并且波导的层延伸平面部分地重叠并且彼此不平行。 各个半导体激光器部分的TE模式的电场方向平行于波导的层延伸平面，使得波导的非平行层延伸平面能够在相应半导体中建立非平行TE模式 激光部分。 在诸如集成半导体激光装置和集成半导体光放大器装置的集成光半导体装置中，通过不均匀地将电流注入到TE模式不相互平行的半导体激光器部分中，可以控制增益的偏振模式依赖性 。

公开(公告)号：US5809047A

公开(公告)日：1998-09-15

申请号：US814316

申请日：1997-03-11

申请人： Jun Nitta

发明人： Jun Nitta

IPC分类号： H04B10/60 ,  H01S5/00 ,  H01S5/06 ,  H01S5/062 ,  H01S5/0625 ,  H04B10/40 ,  H04B10/50 ,  H04B10/508 ,  H04B10/532 ,  H04B10/572 ,  H04B10/58 ,  H01S3/10

CPC分类号： H04B10/506 ,  H01S5/06256 ,  H04B10/572 ,  H01S2301/14 ,  H01S5/0287 ,  H01S5/06236

摘要： A light source apparatus includes a light source, a mode selecting unit, a light source control unit and a mode selection control unit. An oscillation mode of the light source is switchable between a first mode under a first stimulated condition and a second mode under a second stimulated condition, and an oscillation wavelength of the light source is changeable. The mode selecting unit selects between oscillation light in the first mode and oscillation light in the second mode emitted from the light source, and the mode selecting unit can change the mode to be selected between the first mode and the second mode. The light source control unit modulates the oscillation mode of the light source between the first mode and the second mode in accordance with a modulation signal and changes the oscillation wavelength of the light in the unselected mode to set this wavelength to a desired value, in response to an instruction from equipment connected to the light source apparatus, while repressing fluctuation of the oscillation wavelength of the light in the selected mode. The mode selection control unit controls the mode selecting unit to switch the mode to be selected by the mode selecting unit to the mode of the light whose oscillation wavelength has been set to the desired value by the light source control unit.

摘要翻译： 光源装置包括光源，模式选择单元，光源控制单元和模式选择控制单元。 光源的振荡模式可以在第一受激条件下的第一模式和第二受激条件下的第二模式之间切换，并且光源的振荡波长是可变的。 模式选择单元在第一模式的振荡光和从光源发射的第二模式中的振荡光之间进行选择，并且模式选择单元可以改变在第一模式和第二模式之间选择的模式。 光源控制单元根据调制信号在第一模式和第二模式之间调制光源的振荡模式，并且以未选择模式改变光的振荡波长，以将该波长设置为期望值 涉及连接到光源设备的设备的指令，同时抑制所选择的模式下的光的振荡波长的波动。 模式选择控制单元控制模式选择单元将由模式选择单元选择的模式切换到由光源控制单元将振荡波长设置为期望值的光的模式。

公开(公告)号：US5440581A

公开(公告)日：1995-08-08

申请号：US2276

申请日：1993-01-08

申请人： Takeo Ono ,  Jun Nitta

发明人： Takeo Ono ,  Jun Nitta

IPC分类号： G02F1/015 ,  G02F1/025 ,  H01L33/06 ,  H01L33/10 ,  H01L33/30 ,  H01L33/40 ,  H01L33/44 ,  H01S5/00 ,  H01S5/042 ,  H01S5/12 ,  H01S5/34 ,  H01S5/50 ,  H01S3/08

CPC分类号： B82Y20/00 ,  H01S5/5045 ,  H01S5/12 ,  H01S5/3418

摘要： A semiconductor optical filter that includes a semiconductor substrate and a laser structure formed on the substrate. The laser structure includes an active layer of a quantum well structure and a grating formed along the active layer. The active layer is constructed to have a ground state level and an energy level other than the ground state level. A saturation gain of the ground state level is set to a value less than an internal loss, and the other energy level is set to permit an increase in the amount of carriers injected into the laser structure. The laser structure is typically a distributed feedback type laser structure. Anti-reflection coatings may be formed on the end surfaces of the laser structure.

摘要翻译： 一种半导体滤光器，包括半导体衬底和形成在衬底上的激光器结构。 激光器结构包括量子阱结构的有源层和沿有源层形成的光栅。 有源层被构造成具有基态状态电平和除基态电平以外的能级。 基态状态电平的饱和增益被设定为小于内部损耗的值，另一个能级被设定为允许注入到激光器结构中的载流子的量增加。 激光器结构通常是分布式反馈型激光器结构。 可以在激光结构的端面上形成防反射涂层。

公开(公告)号：US5212577A

公开(公告)日：1993-05-18

申请号：US922001

申请日：1992-08-04

申请人： Kenji Nakamura ,  Jun Nitta

发明人： Kenji Nakamura ,  Jun Nitta

IPC分类号： H04B10/145 ,  H04B10/155 ,  H04J14/02

CPC分类号： H04J14/02 ,  H04B10/50 ,  H04B10/506

摘要： An optical communication terminal detects an unused first wavelength in a wavelength range in response to a transmission request and transmits a call signal to a transmission destination using the first wavelength. An acknowledgement signal from the destination is detected in a portion of the wavelength range not including the first wavelength. When a call signal addressed to the terminal from another terminal is detected thereat and the terminal is ready for communication, an unused second wavelength in the wavelength range is detected and an acknowledgement signal is sent using the second wavelength in response to the call signal.

摘要翻译： 光通信终端响应于发送请求检测波长范围内的未使用的第一波长，并使用第一波长将呼叫信号发送到发送目的地。 在不包括第一波长的波长范围的一部分中检测来自目的地的确认信号。 当在其上检测到来自另一终端的终端的呼叫信号，并且终端准备好进行通信时，响应于呼叫信号，检测波长范围内的未使用的第二波长并且使用第二波长发送确认信号。

公开(公告)号：US5157544A

公开(公告)日：1992-10-20

申请号：US659278

申请日：1991-02-22

申请人： Jun Nitta

发明人： Jun Nitta

IPC分类号： G02F1/35 ,  H01S3/105 ,  H01S5/00 ,  H01S5/028 ,  H01S5/042 ,  H01S5/0625 ,  H01S5/0683 ,  H01S5/16 ,  H01S5/34 ,  H01S5/50

CPC分类号： H04B10/2914 ,  H01S5/16 ,  H01S5/50 ,  H01S3/105 ,  H01S5/028 ,  H01S5/0625 ,  H01S5/06255 ,  H01S5/0683 ,  H01S5/3428 ,  H01S5/5045

摘要： A waveguide optical element includes a waveguide layer which is formed on a substrate, through which light propagates and which has an end face from which the propagation light becomes incident on the waveguide layer or emerges, a thin film formed on the end face of the waveguide layer, for increasing or decreasing a reflectance of light at end face, and control means having an electrode formed on a portion of the waveguide layer, for controlling a refractive index of the portion of the waveguide layer, which portion is in contact with the thin film. And its driving method is provided.

公开(公告)号：US4990508A

公开(公告)日：1991-02-05

申请号：US337656

申请日：1989-04-13

申请人： Hirokazu Narita ,  Yozo Todo ,  Jun Nitta ,  Hiroyasu Takagi ,  Fumihiko Iino ,  Mikako Miyajima ,  Yoshikazu Fukuoka ,  Isamu Saikawa

发明人： Hirokazu Narita ,  Yozo Todo ,  Jun Nitta ,  Hiroyasu Takagi ,  Fumihiko Iino ,  Mikako Miyajima ,  Yoshikazu Fukuoka ,  Isamu Saikawa

IPC分类号： A61K31/535 ,  A61K31/44 ,  A61K31/47 ,  A61K31/495 ,  A61K31/54 ,  A61P31/04 ,  C07D20060101 ,  C07D471/04 ,  C07D471/06 ,  C07D471/10 ,  C07D498/04 ,  C07D498/06 ,  C07D513/04 ,  C07D513/06

CPC分类号： C07D471/06 ,  C07D513/06 ,  Y02P20/55

摘要： This invention relates to a novel pyridone carboxylic acid derivative having a substituted or unsubstituted cyclopropyl group at the 10-position of pyridobenzoxazine, pyridobenzothiazine or pyridoquinoxaline and a salt thereof, a process for the production thereof and an antibacterial agent comprising the same.

摘要翻译： 本发明涉及在吡啶并苯并恶嗪10位具有取代或未取代的环丙基基团的吡啶甲酸羧酸衍生物及其盐，其制备方法和含有它们的抗菌剂。