-
公开(公告)号：US5349463A
公开(公告)日：1994-09-20
申请号：US68572
申请日：1993-05-28
申请人： Kazutoshi Hirohashi , Hiroshi Horii , Hideo Koike , Yoshiaki Yunoki , Tetsuo Fukasawa , Susumu Katayama , Akio Yoshikawa , Keishi Ushijima , Takaaki Takeda , Takeshi Nomoto , Michio Kikuta , Shunichi Shichijo , Yoshiki Iwasaki
发明人： Kazutoshi Hirohashi , Hiroshi Horii , Hideo Koike , Yoshiaki Yunoki , Tetsuo Fukasawa , Susumu Katayama , Akio Yoshikawa , Keishi Ushijima , Takaaki Takeda , Takeshi Nomoto , Michio Kikuta , Shunichi Shichijo , Yoshiki Iwasaki
CPC分类号： H04B10/1149
摘要： An optical radio system includes a host device, an end device, and a repeater. The host device and the end device communicate with each other via the repeater by use of optical radio. The repeater includes a section for receiving a first light signal from one of the host device and the end device, a section for converting the received first light signal into a first electric signal, a section for frequency-converting the first electric signal into a second electric signal, and a section for generating a second light signal in response to the second electric signal and transmitting the generated second light signal. The repeater also includes a section for demodulating one of the first electric signal and the second electric signal into a baseband signal, a section for detecting a quality of the baseband signal, and a section for enabling transmission of the second light signal only when the detected quality of the baseband signal is equal to or greater than a predetermined quality.
摘要翻译： 光无线电系统包括主机设备，终端设备和中继器。 主机设备和终端设备通过中继器通过使用光无线电相互通信。 中继器包括用于从主机设备和终端设备之一接收第一光信号的部分，用于将接收的第一光信号转换为第一电信号的部分，用于将第一电信号频率转换为第二电信号的部分 电信号和用于响应于第二电信号产生第二光信号并发送所生成的第二光信号的部分。 中继器还包括用于将第一电信号和第二电信号中的一个解调为基带信号的部分，用于检测基带信号的质量的部分，以及仅在检测到的基带信号时能够传输第二光信号的部分 基带信号的质量等于或大于预定质量。
-
公开(公告)号：US5289306A
公开(公告)日：1994-02-22
申请号：US858292
申请日：1992-03-26
CPC分类号： H04B10/1149
摘要： A repeater for packet data optical communication between terminal devices includes a first section and a second section. The first section includes a first device for receiving a first optical signal transmitted from a terminal device and for converting the first optical signal into a first electric signal, a second device for frequency-converting the first electric signal to a second electric signal, and a third device for converting the second electric signal into a second optical signal and for transmitting the second optical signal. The second section includes a fourth device for receiving a third optical signal and for converting the third optical signal into a third electric signal, a fifth device for frequency-converting the third electric signal to a fourth electric signal, and a sixth device for converting the fourth electric signal into a fourth optical signal and for transmitting the fourth optical signal to a terminal device.
摘要翻译： 用于终端设备之间的分组数据光通信的中继器包括第一部分和第二部分。 第一部分包括用于接收从终端装置发送的第一光信号并将第一光信号转换为第一电信号的第一装置，用于将第一电信号频率转换为第二电信号的第二装置，以及 第三装置，用于将第二电信号转换成第二光信号并用于发送第二光信号。 第二部分包括用于接收第三光信号并将第三光信号转换为第三电信号的第四装置，用于将第三电信号频率转换为第四电信号的第五装置，以及用于转换第三电信号的第六装置 第四电信号转换成第四光信号，并将第四光信号发送到终端装置。
-
公开(公告)号：US06631148B1
公开(公告)日：2003-10-07
申请号：US09515248
申请日：2000-02-29
申请人： Toshiya Fukuhisa , Akio Yoshikawa
发明人： Toshiya Fukuhisa , Akio Yoshikawa
IPC分类号： H01S500
CPC分类号： B82Y20/00 , H01S5/209 , H01S5/222 , H01S5/2231 , H01S5/305 , H01S5/34326
摘要： A semiconductor laser, includes: a first cladding layer; an active layer that is formed on top of the first cladding layer; a second cladding layer that is formed on top of the active layer and has a different type of conductivity to the first cladding layer; an etch-stop layer that is formed on top of the second cladding layer and has a same type of conductivity as the second cladding layer; and a light-confining construction that is formed on top of the etch-stop layer by an etching process. The etch-stop layer has a surface part that contacts the light-confining construction. This surface part is composed of an (AlxGa1−x)yIn1−yP semiconductor, where 0.2≦x
摘要翻译： 一种半导体激光器，包括：第一包层; 形成在所述第一包层的顶部上的有源层; 第二覆层，形成在所述有源层的顶部上并且具有与所述第一包层不同的导电性; 蚀刻停止层，其形成在所述第二包层的顶部上，并且具有与所述第二包层相同类型的导电性; 以及通过蚀刻工艺形成在蚀刻停止层的顶部上的光限制结构。 蚀刻停止层具有接触限光结构的表面部分。 该表面部分由（Al x Ga 1-x）y In 1-y P半导体组成，其中0.2 <= x <0.7且0
-
4.发明授权公开(公告)号：US06501601B1
公开(公告)日：2002-12-31
申请号：US09557711
申请日：2000-04-25
IPC分类号： G02B518
CPC分类号： G11B7/1353 , G02B5/1866 , G11B7/0903 , G11B7/123 , G11B7/1356 , G11B11/10543 , G11B11/10576
摘要： An optical device includes a light-emitting element for irradiating light onto an information recording medium, a diffraction grating for splitting light emitted from said light-emitting element into a plurality of beams, a focussing member for focussing the plurality of beams onto the information recording medium, a deflection member for deflecting the plurality of beams after they have been reflected from the information recording medium; and a photodetector for receiving the plurality of beams after they have been deflected by the deflection member. The diffraction grating has a first grating region and a second grating region, which have different diffraction efficiencies. The zero-order diffraction light in the first grating region is used as the main beam for reproducing the information signal, and the +1-order or −1-order diffraction light in the second grating regions is used as sub-beams for reproduction of the tracking error signal. Thus, the light amount of both the main beam and the sub-beams can be increased without increasing the light emission of the semiconductor laser element 1, and the S/N ratio of the main beam and the sub-beams can be enhanced.
摘要翻译： 光学装置包括用于将光照射到信息记录介质上的发光元件，用于将从所述发光元件发射的光分解成多个光束的衍射光栅，用于将多个光束聚焦到信息记录上的聚焦部件 介质，用于在已经从信息记录介质反射之后偏转多个光束的偏转构件; 以及用于在被偏转构件偏转之后接收多个光束的光电检测器。 衍射光栅具有第一光栅区域和第二光栅区域，其具有不同的衍射效率。 将第一光栅区域中的零级衍射光用作再现信息信号的主光束，并且将第二光栅区域中的+ 1级或-1级衍射光用作用于再现 跟踪误差信号。 因此，在不增加半导体激光元件1的发光的同时，可以增加主光束和子光束的光量，并且可以提高主光束和子光束的S / N比。
-
5.发明授权
公开(公告)号：US5751756A
公开(公告)日：1998-05-12
申请号：US707566
申请日：1996-09-04
申请人： Toru Takayama , Osamu Imafuji , Masaaki Yuri , Masahiro Kume , Akio Yoshikawa
发明人： Toru Takayama , Osamu Imafuji , Masaaki Yuri , Masahiro Kume , Akio Yoshikawa
CPC分类号： H01S5/20 , H01S5/2231 , H01S5/2004 , H01S5/205
摘要： A buffer layer composed of an n-type semiconductor layer, a cladding layer composed of an n-type semiconductor layer, and an active layer are formed sequentially on an n-type semiconductor substrate. On the active layer, there are formed a first optical guiding layer composed of a p-type semiconductor layer including a loss varying layer composed of a p-type semiconductor layer having a bandgap smaller than that of the active layer and a second optical guiding layer composed of a p-type semiconductor layer in this order. On the second optical guiding layer, there is formed a third optical guiding layer composed of a p-type semiconductor layer extending in a stripe. On both sides of the third optical guiding layer on the second optical guiding layer, there are formed current blocking layers which become transparent to a lasing light generated in the active layer composed of the n-type semiconductor layer.
摘要翻译： 在n型半导体衬底上依次形成由n型半导体层，由n型半导体层构成的覆层和有源层构成的缓冲层。 在有源层上形成有由p型半导体层构成的第一光导层，该p型半导体层包括由具有小于有源层的带隙的p型半导体层构成的损耗变化层和第二光导层 由p型半导体层构成。 在第二光导层上形成由条带延伸的p型半导体层构成的第三光导层。 在第二导光层上的第三光导层的两侧形成有对由在n型半导体层构成的有源层中产生的激光产生透明的电流阻挡层。
-
公开(公告)号：US5481524A
公开(公告)日：1996-01-02
申请号：US11311
申请日：1993-01-29
申请人： Akira Ueno , Hideyuki Nakanishi , Hideo Nagai , Akio Yoshikawa
发明人： Akira Ueno , Hideyuki Nakanishi , Hideo Nagai , Akio Yoshikawa
CPC分类号： G11B7/1353 , G11B7/0903
摘要： A diffraction element includes a diffraction grating for dividing a light beam, emitted from a light source along a predetermined path, into a principal light beam and at least two auxiliary light beams, and a hologram for separating the beam, which has been reflected from an optical information recording medium, from the predetermined path. The diffraction grating and the hologram are integrated together by being formed in alignment with each other in opposite portions of a block of glass or plastics. A slide is provided at at least a portion of the diffraction element and includes a peripheral wall in sliding engagement with a cylindrical surface coaxial with an optical axis of the diffraction element to permit the diffraction element to be rotatable about the optical axis.
摘要翻译： 衍射元件包括用于将从光源沿着预定路径发射的光束分成主光束和至少两个辅助光束的衍射光栅和用于分离已经从 光学信息记录介质。 衍射光栅和全息图通过在玻璃或塑料块的相对部分彼此对准地形成在一起。 在衍射元件的至少一部分处设置有滑动件，并且包括与与衍射元件的光轴同轴的圆柱形表面滑动接合的周壁，以允许衍射元件围绕光轴旋转。
-
7.发明授权Semiconductor laser device with integrated reflector on a (511) tilted lattice plane silicon substrate 失效具有集成反射器的半导体激光器件（511）倾斜晶格面硅衬底
公开(公告)号：US5479426A
公开(公告)日：1995-12-26
申请号：US206052
申请日：1994-03-04
CPC分类号： H01S5/02296 , H01S5/0071 , H01S5/02248 , H01S5/0683 , H01S5/3202
摘要： Radiating light from a semiconductor laser element is radiated in a direction normal to the surface of a photodetector substrate. The semiconductor laser element and photodetector are disposed on the same plane. Specifically, a reflecting mirror surface formed of a slanting surface of (111) lattice plane having a ridge line of direction is disposed on a silicon substrate of (100) lattice plane having an off-angle of 4.degree. to 14.degree. about an axis of direction or on a silicon substrate of (511) lattice plane having an off-angle of 1.degree. to 11.degree. about an axis of direction. The semiconductor laser chip is disposed at a position opposing to the reflecting mirror surface.
摘要翻译： 来自半导体激光元件的散射光沿着与光检测器基板的表面垂直的方向辐射。 半导体激光元件和光电检测器设置在同一平面上。 具体地说，在具有<110>方向的棱线的（111）晶格面倾斜表面形成的反射镜表面设置在离开角度为4°至14°的（100）晶格面的硅衬底上 （511）晶格面的硅基板上，沿着<110>方向的轴线偏离为1°至11°。 半导体激光芯片设置在与反射镜表面相对的位置。
-
公开(公告)号：US4948753A
公开(公告)日：1990-08-14
申请号：US114065
申请日：1987-10-29
申请人： Akio Yoshikawa , Takashi Sugino
发明人： Akio Yoshikawa , Takashi Sugino
IPC分类号： H01S5/227
CPC分类号： H01S5/227 , Y10S148/095 , Y10S148/11
摘要： A semiconductor laser and a method of producing the same wherein the semiconductor laser is produced by forming a stripe-shaped projection on the surface of a semiconductor substrate, and forming multilayered thin films with a double heterostructure including an active layer on said semiconductor substrate by using the metal organic chemical vapor phase epitaxial growth method or the molecular beam epitaxial growth method. Thus, a buried stripe-structure semiconductor laser can be produced by a sequence of crystal growth processes.
-
9.发明授权Photodetector unit, and optical pickup, optical reproduction apparatus, and optical recording apparatus equipped with the same 有权光电检测器单元，光拾取器，光学再现装置和配备有其的光学记录装置公开(公告)号：US06597642B1
公开(公告)日：2003-07-22
申请号：US09709929
申请日：2000-11-10
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/0906 , G11B7/0943 , G11B7/123 , G11B7/1275 , G11B7/131 , G11B7/1356 , G11B11/10543 , G11B11/10576 , G11B11/10597 , G11B2007/0006
摘要： An optical pickup that is equipped with a photodetector unit, irradiates an optical disc with a laser beam, and receives returning light reflected by the optical disc, where the optical pickup is constructed to (1) divide the laser beam into a main beam, a preceding sub-beam, and a succeeding sub-beam, (2) direct the main beam, the preceding sub-beam, and the succeeding sub-beam toward the optical disc, and (3) divide returning lights of the main beam, the preceding sub-beam, and the succeeding sub-beam respectively into first-fourth main returning lights, first-fourth preceding returning lights, and first-fourth succeeding returning lights, and the photodetector unit includes: first-fourth main photodetectors that respectively receive the first-fourth main returning lights; first-fourth preceding photodetectors that respectively receive the first-fourth preceding returning lights; and first-fourth succeeding photodetectors that respectively receive the first-fourth succeeding returning lights. A tracking error signal appropriate to the optical disc to be reproduced is selected from three tracking error signals detected according to the detection signals from the photodetectors, and a tracking servo is driven according to the selected tracking error signal.
摘要翻译： 具有光检测器单元的光学拾取器，用激光束照射光盘，并接收由光盘反射的返回光，其中光学拾取器被构造为（1）将激光束分割成主光束， 前面的子光束和后续的子光束，（2）将主光束，前一个子光束和后一个子光束指向光盘，以及（3）分割主光束的返回光， 分别将前次侧光束和后续子光束分别插入第一至第四主回光灯，第一至第四返回灯和第四后续返回光，并且光检测器单元包括：第一至第四主光电检测器，分别接收 第四回主灯; 分别接收前四个返回光的前四分之一的光电检测器; 以及分别接收第一至第四个后续返回光的第一至第四后续光电检测器。 从根据来自光电检测器的检测信号检测的三个跟踪误差信号中选择适合于要再现的光盘的跟踪误差信号，并且根据所选择的跟踪误差信号来驱动跟踪伺服。
-
10.发明授权公开(公告)号：US06501156B1
公开(公告)日：2002-12-31
申请号：US09657484
申请日：2000-09-08
IPC分类号： H01L2312
CPC分类号： H01L23/49568 , H01L23/49503 , H01L23/49541 , H01L23/49548 , H01L31/0203 , H01L33/62 , H01L2924/0002 , H01L2924/00
摘要： A lead frame includes a die pad including a die pad main portion having a large thickness and a die pad peripheral portion having an intermediate thickness smaller than that of the die pad main portion, provided on at least one side of the die pad main portion, at least one support lead connected to the die pad, and at least two first inner leads having a small thickness smaller than that of the die pad peripheral portion, arranged such that end portions thereof are opposed to the die pad peripheral portion. The thick die pad provides good heat release properties, and reducing the thickness of the leads allows fine pitched leads to be produced. Such a lead frame can be manufactured easily by press stamping after belt-shaped regions having different thickness are formed by rolling.
摘要翻译： 引线框架包括：芯片焊盘，其包括具有大厚度的管芯焊盘主体部分和设置在管芯焊盘主体部分的至少一侧上的中间厚度小于管芯焊盘主体部分的中间厚度的焊盘周边部分; 连接到管芯焊盘的至少一个支撑引线，以及至少两个第一内部引线，其小于管芯焊盘周边部分的厚度的小的第一内部引线，其布置成使其端部与管芯焊盘周边部分相对。 厚芯片提供良好的散热性能，并且减小引线的厚度可以产生精细的引线。 通过轧制形成具有不同厚度的带状区域之后，可以通过冲压加工容易地制造这种引线框架。
-
-
-
-
-
-
-
-
-
搜索结果
30 条记录 (耗时 0.056 秒)
