| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 1 | 光纤以及光传送路 | CN201310311165.6 | 2013-07-23 | CN103576234A | 2014-02-12 | 丸山辽; 桑木伸夫; 松尾昌一郎; 大桥正治 |
| 本发明提供光纤以及光传送路。光纤（1）具备折射率分布为α次方型的内侧纤芯（111）、折射率为n1’的外侧纤芯（112）、以及折射率为n2（n1’＜n2＜n1）的包层（12），其中，使沟槽的深度n2－n1’足够大。 | ||||||
| 2 | 用于模分多路复用的少模光纤 | CN201280043850.9 | 2012-08-02 | CN104067152A | 2014-09-24 | S·R·别克汉姆; M-J·李; D·A·诺兰; J·王 |
| 披露一种适用于模分多路复用(MDM)光传输系统的少模光纤。该光纤具有渐变折射率纤芯，该渐变折射率纤芯具有在8μm至14μm范围内的半径R1、在1550nm的波长处大于或等于约2.3并小于约2.7的α值以及相对于包层从大约0.3%至大约0.6%的最大相对折射率Δ1MAX。光纤也具有大于约90μm2并小于约160μm2的有效面积。纤芯和包层在大于1500nm的波长处仅支持LP01和LP11模。包层具有最大相对折射率Δ4MAX，其中Δ1MAX>Δ4MAX，并且LP01和LP11模之间的差分群延迟在1550nm的波长处小于约0.5ns/km。 | ||||||
| 3 | 光合路分路器、双向光传播器以及光发送接收系统 | CN201280041693.8 | 2012-09-27 | CN103765265A | 2014-04-30 | 藤原正满; 铃木谦一; 吉本直人; 小熊学; 渡辺俊夫; 高桥浩; 田野辺博正; 鬼头勤 |
| 本发明涉及一种用同一光器件来实现下行信号的分路和上行信号的合路、使上行信号的合路损耗降低的光合路分路器。本发明的光合路分路器的特征在于，具备：光合路分路单元，对多个上行信号以多模进行合路并输出，对下行信号以单模进行分路并输出；以及双向光传播单元，使从所述光合路分路单元输出的所述上行信号以多模进行传播并输出，使所述下行信号以单模进行传播并输出到所述光合路分路单元。 | ||||||
| 4 | 在S波段中使用更高阶模式的色散补偿光纤 | CN200510055586.2 | 2005-03-16 | CN1670553A | 2005-09-21 | 马克西姆·戈尔利耶; 德尼·莫兰; 路易·阿内·德蒙莫里永; 皮埃尔·西亚尔 |
| 本发明涉及一种在S波段中对标准单模光纤(SMF)或非零色散位移光纤(NZ－DSF)的色散进行补偿的色散补偿光纤，所述色散补偿光纤在所使用的光谱波段上载有光信号，所述光谱波段为从1460nm到1530nm的S波段。所述S波段上的色散补偿光纤的波长对应于全局色散的最小值，该波长位于所使用的光谱波段的范围之外，即S波段之外。 | ||||||
| 5 | 用于模分多路复用的少模光纤 | CN201280043850.9 | 2012-08-02 | CN104067152B | 2017-05-10 | S·R·别克汉姆; M-J·李; D·A·诺兰; J·王 |
| 披露一种适用于模分多路复用(MDM)光传输系统的少模光纤。该光纤具有渐变折射率纤芯，该渐变折射率纤芯具有在8μm至14μm范围内的半径R1、在1550nm的波长处大于或等于约2.3并小于约2.7的α值以及相对于包层从大约0.3%至大约0.6%的最大相对折射率Δ1MAX。光纤也具有大于约90μm2并小于约160μm2的有效面积。纤芯和包层在大于1500nm的波长处仅支持LP01和LP11模。包层具有最大相对折射率Δ4MAX，其中Δ1MAX>Δ4MAX，并且LP01和LP11模之间的差分群延迟在1550nm的波长处小于约0.5ns/km。 | ||||||
| 6 | 光合路分路器、双向光传播器以及光发送接收系统 | CN201280041693.8 | 2012-09-27 | CN103765265B | 2016-10-12 | 藤原正满; 铃木谦一; 吉本直人; 小熊学; 渡辺俊夫; 高桥浩; 田野辺博正; 鬼头勤 |
| 本发明涉及一种用同一光器件来实现下行信号的分路和上行信号的合路、使上行信号的合路损耗降低的光合路分路器。本发明的光合路分路器的特征在于，具备：光合路分路单元，对多个上行信号以多模进行合路并输出，对下行信号以单模进行分路并输出；以及双向光传播单元，使从所述光合路分路单元输出的所述上行信号以多模进行传播并输出，使所述下行信号以单模进行传播并输出到所述光合路分路单元。 | ||||||
| 7 | 光纤以及光传送路 | CN201310311165.6 | 2013-07-23 | CN103576234B | 2016-06-29 | 丸山辽; 桑木伸夫; 松尾昌一郎; 大桥正治 |
| 本发明提供光纤以及光传送路。光纤（1）具备折射率分布为α次方型的内侧纤芯（111）、折射率为n1’的外侧纤芯（112）、以及折射率为n2（n1’＜n2＜n1）的包层（12），其中，使沟槽的深度n2－n1’足够大。 | ||||||
| 8 | 光纤以及光传输路 | CN201480002049.9 | 2014-02-05 | CN104520739A | 2015-04-15 | 丸山辽; 桑木伸夫; 松尾昌一郎 |
| 本发明涉及光纤以及光传输路。光纤(Fp、Fn)是传送信号光所包含的LP01模式成分以及LP11模式成分的双模光纤，在预先决定的波段中，模式色散Δτ为恒定。 | ||||||
| 9 | 在S波段中使用更高阶模式的色散补偿光纤 | CN200510055586.2 | 2005-03-16 | CN100397118C | 2008-06-25 | 马克西姆·戈尔利耶; 德尼·莫兰; 路易·阿内·德蒙莫里永; 皮埃尔·西亚尔 |
| 本发明涉及一种在S波段中对标准单模光纤(SMF)或非零色散位移光纤(NZ-DSF)的色散进行补偿的色散补偿光纤，所述色散补偿光纤在所使用的光谱波段上载有光信号，所述光谱波段为从1460nm到1530nm的S波段。所述S波段上的色散补偿光纤的波长对应于全局色散的最小值，该波长位于所使用的光谱波段的范围之外，即S波段之外。 | ||||||
| 10 | Article comprising a dispersion-compensating optical waveguide | US197379 | 1994-02-16 | US5448674A | 1995-09-05 | Ashish M. Vengsarkar; Kenneth L. Walker |
| Disclosed is optical fiber that can advantageously be used to compensate chromatic dispersion in an optical fiber communication system, typically a system that is upgraded from 1.3 .mu.m to 1.55 .mu.m operating wavelength (.lambda..sub.op). The fiber typically has a power law core refractive index profile, a refractive index "trench" surrounding the core, and a refractive index "ridge" surrounding the trench. The refractive index profile of the fiber preferably is designed such that the fiber supports the fundamental mode (LP.sub.01), does not support the LP.sub.11 mode but does support the LP.sub.02 mode, all at .lambda..sub.op. At .lambda..sub.op, LP.sub.01 has dispersion more negative than -150 ps/nm.multidot.km and, in a preferred embodiment, LP.sub.01 also has negative dispersion slope at .lambda..sub.op. In a further embodiment of the invention the refractive index profile is designed such that the cut-off wavelength of the LP.sub.11 mode is less than that of the higher order mode, typically LP.sub.02, and less than .lambda..sub.op, such that the fiber does not support propagation of the LP.sub.11 mode. In some preferred embodiments the fiber is designed to have dispersion more negative than about -90 ps/nm.multidot.km and loss less than about 0.5 dB/km at .lambda..sub.op .about.1.55 .mu.m. | ||||||
| 11 | Fiber-optic devices and sensors using fiber grating | US196641 | 1994-02-15 | US5444803A | 1995-08-22 | Byoung Y. Kim; Yeon W. Koh; Seok H. Yun |
| Fiber-optic devices and sensors are implemented using fiber gratings. The fiber-optic device includes the fiber grating, an input mode stripper and an output mode stripper placed at both ends of the fiber grating, to admit only one mode therethrough, and a polarizer. The fiber grating of this invention is used in combination with a directional coupler instead of a mode stripper and a polarizer. The fiber-optic device outputs desired wavelengths, a switching signal or an interference signal. An external perturbation, such as a strain, a temperature, light pulse, and etc. may be applied to the fiber grating in its preparation to change a characteristic of the fiber grating. These perturbations are actively used to make fiber-optic devices and sensors. | ||||||
| 12 | Pure-silica core dual-mode optical fiber | US988607 | 1992-02-28 | US5329607A | 1994-07-12 | Neil T. Kamikawa; Arthur T. Nakagawa |
| An improved dual-mode optical fiber provides for an improved combination of spectral attenuation, bending losses and modal noise and modal dispersion for long-haul transmission at 1550 nm. The dual-mode optical fiber has a pure-silica core and a silica cladding depressed with fluorine so that the core and cladding have a relative refractive index difference, .DELTA., of about 0.72% and a second-mode cutoff wavelength, .lambda..sub.c, at 1630 nm. Optionally, a non-silica core and cladding can be used for long-haul transmission at 1550 nm. when the core and cladding have a relative refractive index difference, .DELTA., of about 0.72% and a second-mode cutoff wavelength, .lambda..sub.c, at 1630 nm. | ||||||
| 13 | Passive quadrature phase detection system for coherent fiber optic systems | US401175 | 1989-08-31 | US5200795A | 1993-04-06 | Byoung Y. Kim; Hee G. Park; Shangyuan Huang |
| A passive quadrature phase detection system for coherent fiber systems includes first and second optical detectors positioned to receive an output signal from the output end of an optical signal apparatus such as an interferometer, or the like. The optical signal from the apparatus includes light propagating in two propagation modes. As the light propagates away from the output end of the apparatus from the near field to the far field, the light in the two modes undergoes a relative phase shift of .pi./2 in accordance with the Guoy effect. The two detectors are positioned such that the first detector detects the intensity of light resulting from the interference between the two modes in the near field of the output signal, and such that the second detector detects the intensity of light resulting from the interference between the two modes in the far field of the output signal. The additional .pi./2 phase difference introduced between the two modes as the light propagates from the near field light to the far field causes the detected light intensities to be in phase quadrature. Electrical signals proportional to the detected light intensities can be processed to determine changes in the phase difference between the two modes within the apparatus. In preferred embodiments, the detection of the near field light intensity is accomplished at a position optically displaced from the output end of the apparatus. | ||||||
| 14 | Optical waveguides having reduced bending loss and method of making the same | US694652 | 1991-05-02 | US5175785A | 1992-12-29 | Franklin W. Dabby |
| An optical waveguide that has low (0.16 to 0.28 db/km) attenuation but can be subjected to sharp radii of curvature of the order of 2 mm has an index of refraction difference between core and cladding of less than 0.75% and a cutoff wavelength that is 50 micrometers or more greater than the operating wavelength. The waveguide is a "virtual single mode" device, because even though a second order mode can be sustained in the waveguide, the waveguide length or bending losses, or both, differentially attenuates the second order mode so that the primary mode strongly predominates and both modal noise and attenuation are within acceptable limits. | ||||||
| 15 | Asymmetrical bidirectional telecommunication system | US259723 | 1988-10-19 | US4889404A | 1989-12-26 | Venkata A. Bhagavatula; David E. Charlton |
| The present invention pertains to an asymmetrical bidirectional optical communication system of the type comprising a central station, a plurality of user stations, and a plurality of bidirectional optical transmission paths, one of which connects the central station and one of the user stations. The central station is provided with a laser for initiating in the optical transmission path the propagation at a wavelength in the 1100-1700 nm window of a single-mode signal. Each user station is provided with a light source which initiates in the optical transmission path the propagation at a wavelength in the 700-950 nm window of a few-mode signal. Each optical transmission path comprises an optical fiber having transmission characteristics such that the single-mode signal propagates with a total dispersion less than 5 ps/km-nm and the few mode signal propagates with a bandwidth greater than 1 GHz-km. | ||||||
| 16 | Dynamic coupler using two-mode optical waveguides | US17762 | 1987-02-20 | US4741586A | 1988-05-03 | Byoung Y. Kim; Herbert J. Shaw |
| An optical mode coupling apparatus includes an optical waveguide that couples an optical signal from one propagation mode of the waveguide to a second propagation mode of the waveguide. The optical signal propagating in the waveguide has a beat length, and the coupling apparatus includes a source of perturbational light signal that propagates in the waveguide in two spatial propagation modes having different propagation constants so as to have a perturbational signal beat length. The perturbational signal has an intensity distribution in the waveguide that causes periodic perturbations in the refractive indices of the waveguide in accordance with the perturbational signal beat length. The periodic perturbations of the refractive indices of the optical waveguide cause cumulative coupling of the optical signal from one propagation mode to another propagation mode. The perturbational light signal can be selectively enabled and disabled to selectively enable and disable coupling of the optical signal between the propagation modes. | ||||||
| 17 | Single mode optical fiber | US699641 | 1985-02-08 | US4641917A | 1987-02-10 | Paul F. Glodis; Terrence A. Lenhan |
| A single mode optical fiber comprises a core, a first cladding surrounding the core, and a second cladding surrounding the first cladding. It also comprises a third cladding region (or index "ring"). The core, has radius a and refractive index n.sub.c, the first, second, and third cladding regions have inner radii, R.sub.1i, R.sub.2i, and R.sub.3i, outer radii R.sub.1o, R.sub.2o, and R.sub.3o, and indices n.sub.1, n.sub.2, n.sub.3, respectively. The fiber has n.sub.1 <n.sub.3, R.sub.1o .ltoreq.R.sub.3i, R.sub.3o .ltoreq.R.sub.2i. In preferred embodiments, a=R.sub.1i, R.sub.1o =R.sub.3i, R.sub.3o =R.sub.2i. Appropriate choice of ring parameters can result in a lowering of the cut-off wavelength of the fiber, or in fiber that is less sensitive to macrobending than similar prior art fiber lacking an index ring, without substantial change in fiber parameters that depend primarily on the waveform in the core. An optical fiber communications system comprising the inventive fiber is also disclosed. | ||||||
| 18 | Filter obtained by writing a Bragg grating into an optical fiber | US808862 | 1997-02-28 | US5818987A | 1998-10-06 | Fatima Bakhti; Isabelle Riant; Pierre Sansonetti; Fran.cedilla.ois Gonthier |
| An optical filter is formed by writing at least one long-period Bragg array into an optical fiber which is tapered to define two substantially adiabatic transition areas delimiting an intermediate area in which the long-period Bragg grating is written to produce codirectional coupling between two guided modes in the intermediate area at a wavelength that is a function of the period of the grating. | ||||||
| 19 | Optical filter comprising multi-mode waveguides coupled in series | US646256 | 1996-05-30 | US5796891A | 1998-08-18 | Alistair J. Poustie; Neil Finlayson |
| An optical filter and method of filtering uses a multi-mode waveguide having a first number n modes and a second waveguide having a different number m modes are coupled in series, where n and m are integers and n>m, and where the interaction of different modes at the interface of the two waveguides filters an optical signal propagating through the waveguides to provide a desired response characteristic. A lateral offset between the central axes of the waveguides at their interface is changed to control the response of the filter. For a multiple wavelength optical source uses, a filter coupled in the optical cavity including a laser gain medium provides interaction of different modes at the interface of waveguides in the filter to filter an optical signal propagating in the cavity thereby providing an output signal with multiple peaks at different wavelengths with a predetermined spacing. | ||||||
| 20 | Apparatus for selecting waveguide modes in optical fiber and the method of manufacturing the same | US419603 | 1995-04-10 | US5586205A | 1996-12-17 | Tien-Jung Chen; Shu-Hsia Chen |
| An apparatus for selecting waveguide modes in optical fibers is disclosed, which comprises an optical fiber having of a core and a cladding sheathing the core. The optical fiber has a selected portion of the cladding removed and forms a recessed space in the cladding while preserving a predetermined thickness of the cladding remaining covering the core. The optical fiber is selected for allowing the transmission of light having multiple waveguide modes with radial and azimuthal electric field components. The apparatus further comprises a birefringent material filled in the recessed space. The birefringent material has the first and second refractive indices and the first refractive index is larger than the core index of the optical fiber, while the second refractive index is smaller than the cladding index of the optical fiber. The first and second refractive indices of the birefringent material are arranged in the radial and azimuthal directions of the optical fiber respectively, so that the transmitted light of the waveguide mode with the radial electric field component is coupled out from the core of the optical fiber to the selective portion of the cladding, and the transmitted light of the waveguide mode with only the azimuthal electric field component remains transmitted through the optical fiber. | ||||||
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