专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明授权

US06215566B1 Multi-wavelength light source and discrete-wavelength-variable light source 失效
公开(公告)号：US06215566B1
公开(公告)日：2001-04-10
申请号：US09625387
申请日：2000-07-26
申请人： Tetsuya Miyazaki , Noboru Edagawa , Shu Yamamoto
发明人： Tetsuya Miyazaki , Noboru Edagawa , Shu Yamamoto
IPC分类号： H04J1406
CPC分类号： H01S3/2383 , H01S3/067 , H01S3/06791 , H01S3/08086 , H04B2210/258 , H04J14/02
摘要： In a light source for generating light containing multiple wavelengths substantially uniform in intensity, a wavelength demultiplexing element 10 (for example, waveguide-type wavelength selecting filter) demultiplexes input light into a plurality of wavelengths &lgr;1 through &lgr;32. Optical amplifiers 14-1 through 14-32 amplify outputs of the element 10 and applies them to input ports of a wavelength multiplexing element 12. The wavelength multiplexing element 12 wavelength-multiplexes their input. Output of the wavelength multiplexing element 12 is applied to a fiber coupler 16 which, in turn, applies one of its outputs to the wavelength demultiplexing element 10. The optical amplifiers 14 have a gain larger by approximately 10 dB than the loss in the optical loop made of the element 10, optical amplifier 14, element 12 and fiber coupler 16. The other output of the fiber coupler 16 is wavelength-multiplex light containing wavelengths &lgr;1 through &lgr;32.

42. 发明授权

US06768872B1 Optical transmission system, optical transmission line and optical transmitter 失效
标题翻译：光传输系统，光传输线和光发射机
公开(公告)号：US06768872B1
公开(公告)日：2004-07-27
申请号：US09670003
申请日：2000-09-25
申请人： Takehiro Tsuritani , Keiji Tanaka , Noboru Edagawa , Masatoshi Suzuki
发明人： Takehiro Tsuritani , Keiji Tanaka , Noboru Edagawa , Masatoshi Suzuki
IPC分类号： H04J1402
CPC分类号： H04B10/25253
摘要： An optical transmitter outputs WDM signal lights comprising signal lights with 100 wavelengths of 10 Gbit/s, onto an optical transmission fiber. In the optical transmission line, a transmission fiber and a local area dispersion compensation fiber are disposed per repeater span defined by an optical amplification repeater, the local area dispersion compensation fiber is for compensating the average chromatic dispersion in the repeater span to become 2 ps/nm/km as well as a dispersion slope to become zero, and a wide area dispersion compensation fiber for compensating the average chromatic dispersion to become −0.2 ps/nm/km as well as the dispersion slope to become zero is disposed per predetermined number of optical repeater spans. The optical transmission fiber comprises a single mode optical fiber with large core diameter having a zero dispersion wavelength at a 1.3 &mgr;m band and plus chromatic dispersion at a signal wavelength band (a 1.55 &mgr;m band). The optical amplification repeater comprises an erbium-doped optical fiber to be pumped by a 0.98 &mgr;m band pumping light.
摘要翻译：光发射机将包含10兆比特/秒波长的信号光的WDM信号灯输出到光传输光纤上。在光传输线路中，在由光放大中继器限定的每个中继器跨度上布置传输光纤和局部色散补偿光纤，局部色散补偿光纤用于将中继器跨度中的平均色散补偿为2ps / nm / km以及色散斜率为零，并且将用于将平均色散补偿为-0.2ps / nm / km以及将色散斜率补偿为零的广域色散补偿光纤设置为每个预定数量的光中继器。光传输光纤包括在1.3mum波段处具有零色散波长的大芯径的单模光纤，并且在信号波长带（1.55μm波段）处加上色散。光放大中继器包括一个掺铒光纤，通过0.98 mum带激发光泵浦。

43. 发明授权

US06748178B2 Optical transmission line 失效
标题翻译：光传输线
公开(公告)号：US06748178B2
公开(公告)日：2004-06-08
申请号：US09795245
申请日：2001-02-26
申请人： Takayuki Miyakawa , Masatoshi Suzuki , Noboru Edagawa
发明人： Takayuki Miyakawa , Masatoshi Suzuki , Noboru Edagawa
IPC分类号： H04B1018
CPC分类号： H04B10/2916 , H04B2210/003
摘要： An optical fiber (12a) with a large effective core area and a large chromatic dispersion value is disposed on an input side of signal light, and an optical fiber (12b) with a small effective core area and a small chromatic dispersion value or a chromatic dispersion value of negative polarity is disposed on an output side of the signal light. A pumping light source (14) generates pumping light of 1450 nm to cause Raman amplification of 1550 nm in the optical fiber (12b). The output light from the pumping light source (14) enters the optical fiber (12b) from the back through a WDM optical coupler (16). Provided that y=(Pin−&agr;)/(Pp·10 Log L) where input power of the optical fiber (12a) (i.e. output power of an optical transmitter (10)) is Pin, a total loss of the optical fibers (12a and 12b) is &agr;, pumping power for Raman amplification is Pp, and a total length of the optical fibers (12a and 12b) is L, the relation between ratio x (0≦x≦1) of the optical fiber (12b) and y is expressed as y=6.63×10−2x−0.077. Here, the satisfactory x value is in a range from +0.2 to −0.2 of the y value.
摘要翻译：具有大的有效核心面积和大的色散值的光纤（12a）被布置在信号光的输入侧，并且具有小的有效核心区域和小的色散值或色度的光纤（12b）负极性的色散值被设置在信号光的输出侧。泵浦光源（14）产生1450nm的泵浦光，以在光纤（12b）中引起1550nm的拉曼放大。来自泵浦光源（14）的输出光通过WDM光耦合器（16）从后面进入光纤（12b）。假设光纤（12a）的输入功率（即，光发射器（10）的输出功率））为Pin的y =（Pin-alpha）/（Pp.10Log L），光纤的总损耗 12a和12b）为α，用于拉曼放大的泵送功率为Pp，光纤（12a和12b）的总长度为L，光纤的比例x（0 <= x <= 1） 12b），y表示为y = 6.63×10 -2 x-0.077。这里，满意的x值在y值的+0.2〜-0.2的范围内。

44. 发明授权

US06728437B2 Pumping light generator and fiber Raman amplifier 失效
标题翻译：泵浦光发生器和光纤拉曼放大器
公开(公告)号：US06728437B2
公开(公告)日：2004-04-27
申请号：US09882352
申请日：2001-06-15
申请人： Noboru Edagawa , Masatoshi Suzuki
发明人： Noboru Edagawa , Masatoshi Suzuki
IPC分类号： G02B626
CPC分类号： H01S3/09415 , H01S3/09408 , H01S3/302
摘要： An object of the present invention is to prevent an increase of the degree of polarization of an output pumping light even if one of pumping light sources has a failure. Laser diodes (30a, 30b) are composed of FP-LDs made of InGaAsP to laser-oscillate at 1480 nm band. The outputs from the laser diodes (30a, 30b) enter a polarizing beam splitter (32) in orthogonal state of polarization and are combined there. The combined light by the polarizing beam splitter (32) enters a depolarizing element (34) and is depolarized there.
摘要翻译：本发明的一个目的是防止输出泵浦光的偏振度的增加，即使其中一个泵浦光源有故障。激光二极管（30a，30b）由由InGaAsP制成的FP-LD组成，以1480nm波段激光振荡。来自激光二极管（30a，30b）的输出以正交偏振态进入偏振光束分离器（32）并在其中组合。由偏振分束器（32）组合的光进入去极化元件（34），并在那里去极化。

45. 发明授权

US06549711B1 Soliton pulse compression optical fiber and method for making soliton pulse compression optical fiber 失效
标题翻译：孤子脉冲压缩光纤和孤子脉冲压缩光纤的方法
公开(公告)号：US06549711B1
公开(公告)日：2003-04-15
申请号：US09240593
申请日：1999-02-01
申请人： Tadakatsu Shimada , Kazuo Koya , Noboru Edagawa , Masatoshi Suzuki , Itsuro Morita
发明人： Tadakatsu Shimada , Kazuo Koya , Noboru Edagawa , Masatoshi Suzuki , Itsuro Morita
IPC分类号： G02B602
CPC分类号： G02B6/02247 , C03B37/027 , C03B2203/06 , C03B2203/18 , C03B2203/36 , G02B6/02 , G02B6/02028
摘要： The soliton pulse compression optical fiber comprises a core and a clad that surrounds the core for compressing the injected light pulse in width. The maximum relative index difference between the core and the clad is between about 1.2% and 2.5%. The core diameter of the soliton pulse compression optical fiber varies along the length of the soliton pulse compression optical fiber and the core has a step-like refractive index distribution. The optical fiber perform of the soliton pulse compression optical fiber comprises a core preform, which is to be a core of the soliton pulse compression optical fiber, and a clad preform that surrounds the core preform. The maximum relative index difference between the core perform and the clad preform is also between about 1.2% and 2.5%.
摘要翻译：孤子脉冲压缩光纤包括芯和围绕芯的包层，用于压缩注入的光脉冲的宽度。芯和包层之间的最大相对折射率差在约1.2％至2.5％之间。孤子脉冲压缩光纤的芯直径沿着孤子脉冲压缩光纤的长度变化，并且芯具有阶梯状折射率分布。孤子脉冲压缩光纤的光纤执行包括作为孤子脉冲压缩光纤的核心的芯预制棒和围绕芯预制棒的包层预制棒。核心执行和包层预制件之间的最大相对折射率差异也在约1.2％至2.5％之间。

46. 发明授权

US5260816A Optical amplifier with erbium-doped fiber 失效
标题翻译：具有掺铒光纤的光放大器
公开(公告)号：US5260816A
公开(公告)日：1993-11-09
申请号：US949788
申请日：1992-09-22
申请人： Noboru Edagawa , Yoshihiro Yoshida , Minoru Taya , Kazuo Koya
发明人： Noboru Edagawa , Yoshihiro Yoshida , Minoru Taya , Kazuo Koya
IPC分类号： C03B13/04 , C03C13/04 , G02B6/00 , G02B6/02 , G02F1/35 , H01S3/06 , H01S3/067 , H01S3/10 , H01S3/30
CPC分类号： H01S3/06708
摘要： The optical amplification gain of an optical amplifier consisting of an optical amplifier unit and a single-mode erbium-doped fiber can be optimized when the length of the fiber L in meters and the optical absorption in dB/meter of the fiber per unit length at a wavelength of 1.53 .mu.m satisfy the relationship that L.times.y is in the range from 70 to 170 dB by appropriately selecting the doping level of the glass with erbium and the length of the fiber.

47. 发明授权

US06519078B2 Raman amplifier 失效
公开(公告)号：US06519078B2
公开(公告)日：2003-02-11
申请号：US09887915
申请日：2001-06-21
申请人： Takayuki Miyakawa , Noboru Edagawa , Masatoshi Suzuki
发明人： Takayuki Miyakawa , Noboru Edagawa , Masatoshi Suzuki
IPC分类号： H01S330
CPC分类号： H01S3/302
摘要： The object of this invention is to improve SNR in the Raman amplification. An optical fiber (10) consists of a dispersion shift fiber in which a zero dispersion wavelength is shifted to the 1.55 &mgr;m band, and an optical fiber (12) consists of a single mode optical fiber having the effective core area of 100 &mgr;m2 which is larger than that of the optical fiber (10). An optical coupler 14 is disposed at the optical signal emission end of the optical fiber (12). A laser diode (16) outputs the laser light of 1455 nm as a Raman pumping light source. The output light from the laser diode (16) is introduced into the optical fiber (12) from the back, namely in the opposite direction to that of the optical signal propagation. The ratio of the Raman gain coefficient of the optical fiber (12) to that of the optical fiber (11) should be 1/1.08 or less, preferably 1/1.1 or less.

48. 发明授权

US5246475A Method for preparing a fused silica glass body co-doped with a rare earth element and aluminum 失效
标题翻译：制备与稀土元素和铝共掺的熔融石英玻璃体的方法
公开(公告)号：US5246475A
公开(公告)日：1993-09-21
申请号：US858045
申请日：1992-03-26
申请人： Noboru Edagawa , Yoshihiro Yoshida , Minoru Taya , Tadakatsi Shimada , Kazuo Koya
发明人： Noboru Edagawa , Yoshihiro Yoshida , Minoru Taya , Tadakatsi Shimada , Kazuo Koya
IPC分类号： C03B20/00 , C03B8/04 , C03B37/014 , C03C3/06 , G02B6/00 , G02F1/35
CPC分类号： C03C23/0095 , C03B37/01413 , C03B37/01433 , C03C3/06 , C03B2201/36 , C03B2207/90 , C03C2201/31 , C03C2201/3423 , C03C2201/3435 , C03C2201/3447 , C03C2201/3476 , C03C2201/36 , C03C2203/40 , C03C2203/44 , Y10S65/901
摘要： A novel method is proposed for the preparation of a transparent fused silica glass body co-doped with a rare earth element and aluminum each in a high uniformity of the dopant distribution. The method comprises the steps of: (a) flame-hydrolyzing a silicon compound and an aluminum compound in an oxyhydrogen flame to form a porous silicon oxide body containing aluminum; (b) soaking the porous body having a specified bulk density with a solution of a rare earth compound; (c) drying the solution-soaked porous body; and (d) sintering and vitrifying the dried porous body into a transparent glass body.
摘要翻译：提出了一种制备掺杂有稀土元素和铝的透明熔融石英玻璃体的新颖方法，每个都具有高均匀度的掺杂剂分布。该方法包括以下步骤：（a）在氢氧焰中使硅化合物和铝化合物火焰水解，形成含有铝的多孔氧化硅体; （b）用稀土化合物溶液浸泡具有特定体积密度的多孔体; （c）干燥溶液浸泡的多孔体; 和（d）将干燥的多孔体烧结并玻璃化成透明玻璃体。

49. 发明授权

US07558482B2 Method for dynamically establishing logical link in PON systems and an optical network unit for the method 失效
标题翻译：在PON系统中动态建立逻辑链路的方法和该方法的光网络单元
公开(公告)号：US07558482B2
公开(公告)日：2009-07-07
申请号：US11251608
申请日：2005-10-13
申请人： Keiji Tanaka , Noboru Edagawa
发明人： Keiji Tanaka , Noboru Edagawa
IPC分类号： H04J14/08
CPC分类号： H04L12/12 , Y02D50/40
摘要： The invention is applied to a PON system including an optical line terminal (OLT) at a center station, a plurality of optical network units (ONUs) at subscribers' sites, and an optical transmission line shared by the plurality ONUs to optically connect between the OLT and the plurality of ONUs. Each of the ONUs requests the OLT to assign a logical link according to start-up of an application.
摘要翻译：本发明应用于包括中心站的光线路终端（OLT），用户站点处的多个光网络单元（ONU）和由多个ONU共享的光传输线的PON系统，以在 OLT和多个ONU。每个ONU请求OLT根据应用的启动分配逻辑链路。

50. 发明申请

US20060083245A1 Method for dynamically establishing logical link in PON systems and an optical network unit for the method 失效
公开(公告)号：US20060083245A1
公开(公告)日：2006-04-20
申请号：US11251608
申请日：2005-10-13
申请人： Keiji Tanaka , Noboru Edagawa
发明人： Keiji Tanaka , Noboru Edagawa
IPC分类号： H04L12/28
CPC分类号： H04L12/12 , Y02D50/40
摘要： The invention is applied to a PON system including an optical line terminal (OLT) at a center station, a plurality of optical network units (ONUs) at subscribers' sites, and an optical transmission line shared by the plurality ONUs to optically connect between the OLT and the plurality of ONUs. Each of the ONUs requests the OLT to assign a logical link according to start-up of an application.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式