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    • 1. 发明申请
    • SINGLE-MODE OPTICAL FIBER
    • 光学单模光纤
    • WO00014580A1
    • 2000-03-16
    • PCT/EP1999/006188
    • 1999-08-23
    • G02B6/036G02B6/02G02B6/028G02B6/16G02B6/22
    • G02B6/0281G02B6/02228G02B6/03644
    • The invention relates to a single-mode low-dispersion optical fiber for wavelength division multiplexing (WDM) of an optical transmission link, comprising a central fiber core with a radius r1, two inner layers of cladding with an outer radius r2 or a, whereby a is greater than r2, and an outer layer of cladding, whereby the refractive index n(r) of the fibers is inconstant as a function of the fibre radius r (a triple clad fiber). A fiber with a low dispersion in the wavelength range of approximately 1400 - 1700 nm, i.e. in the third optical window, can be manufactured using conventional production methods by selecting the appropriate profile and refractive index differentials between the core and or cladding without increasing the attenuation of said fibers. The transmission quality and output of an optical transmission link is increased by the inventive fibers in comparison with other standard optical fibers.
    • 本发明涉及一种光学单模光纤具有用于波分复用(WDM)光传输链路,由半径为r 1,两个内纤维鞘层的外半径r 2的中央纤芯和一与> R 2和外低色散 纤维鞘层,其中所述纤维为光纤半径r的函数的折射率分布N(R)不是恒定的(三重包层光纤)。 由轮廓形状的合适的选择和芯与包层之间的折射率差可以通过常规的制造方法,具有在波长范围1400〜1700nm的的低分散性的纤维,而在第三光学窗口。由此产生,其中,所述光纤的衰减不增加。 因此,利用本发明的纤维在标准光纤的光传输链路的传输质量和传输功率可以增加。
    • 2. 发明申请
    • REDUCING MODE INTERFERENCE IN OPTICAL WAVEGUIDES
    • 减少光波形中的模式干扰
    • WO0077549B1
    • 2001-02-08
    • PCT/US0015719
    • 2000-06-08
    • LASERCOMM INC
    • DANZIGER YOCHAYHERMAN ERANLEVY URIRESENBLIT MICHAEL
    • G02B6/036G02B6/22G02B6/16
    • G02B6/03688G02B6/02023G02B6/02228G02B6/02233G02B6/02261G02B6/03611G02B6/03627G02B6/03644G02B6/03672G02B6/03694
    • An optical waveguide supporting a plurality of modes including an annulus which attenuates a desired mode to a lesser degree than any other mode in the plurality of modes. In one embodiment, the annulus is disposed in the core of the waveguide. In another embodiment, the annulus is concentric about the core. In another embodiment, the annulus has a predetermined width and radius. In yet another embodiment the optical waveguide includes an annulus that is disposed at a radial position corresponding to a region in the core in which the desired mode has substantially no energy. In yet another embodiment the desired mode includes the LP02 mode. In another embodiment, the annulus includes a scattering material. In still another embodiment, the annulus includes a conductive dopant material. Another embodiment includes a sharp change of refractive index within the core. Still other embodiments include disposing a region of increased refractive index in the core of the waveguide to attenuate undesired modes. Another embodiment includes disposing a region of decreased refractive index in the core of the waveguide to attenuate undesired modes. Other embodiments include combinations of annuli. These combinations of annuli can include, for example, absorbing annuli, scattering annuli, annuli comprising conductive dopant material, regions of increased refractive index, and regions of decreased refractive index or any combination thereof.
    • 支撑多个模式的光波导,包括将所需模式衰减到比多个模式中的任何其它模式更小程度的环形空间。 在一个实施例中,环状物设置在波导的芯中。 在另一个实施例中,环与芯相同心。 在另一个实施例中,环具有预定的宽度和半径。 在另一个实施例中,光波导包括环形,其设置在对应于芯中的区域的径向位置处,其中期望模式基本上不具有能量。 在另一个实施例中,期望的模式包括LP02模式。 在另一个实施例中,环形空间包括散射材料。 在另一个实施方案中,环状物包括导电掺杂剂材料。 另一个实施例包括芯内折射率的急剧变化。 其他实施例包括在波导的芯中设置增加折射率的区域以衰减不期望的模式。 另一实施例包括在波导的芯中布置降低折射率的区域以衰减不期望的模式。 其他实施例包括环的组合。 环的这些组合可以包括例如吸收环,散射环,包含导电掺杂剂材料的环,折射率增加的区和折射率降低的区或其任何组合。
    • 3. 发明申请
    • REDUCING MODE INTERFERENCE IN OPTICAL WAVEGUIDES
    • 减少光波形中的模式干扰
    • WO00077549A1
    • 2000-12-21
    • PCT/US2000/015719
    • 2000-06-08
    • G02B6/036G02B6/22G02B6/16
    • G02B6/03688G02B6/02023G02B6/02228G02B6/02233G02B6/02261G02B6/03611G02B6/03627G02B6/03644G02B6/03672G02B6/03694
    • An optical waveguide supporting a plurality of modes including an annulus which attenuates a desired mode to a lesser degree than any other mode in the plurality of modes. In one embodiment, the annulus is disposed in the core of the waveguide. In another embodiment, the annulus is concentric about the core. In another embodiment, the annulus has a predetermined width and radius. In yet another embodiment the optical waveguide includes an annulus that is disposed at a radial position corresponding to a region in the core in which the desired mode has substantially no energy. In yet another embodiment the desired mode includes the LP02 mode. In another embodiment, the annulus includes a scattering material. In still another embodiment, the annulus includes a conductive dopant material. Another embodiment includes a sharp change of refractive index within the core. Still other embodiments include disposing a region of increased refractive index in the core of the waveguide to attenuate undesired modes. Another embodiment includes disposing a region of decreased refractive index in the core of the waveguide to attenuate undesired modes. Other embodiments include combinations of annuli. These combinations of annuli can include, for example, absorbing annuli, scattering annuli, annuli comprising conductive dopant material, regions of increased refractive index, and regions of decreased refractive index or any combination thereof.
    • 支撑多个模式的光波导,包括将所需模式衰减到比多个模式中的任何其它模式更小程度的环。 在一个实施例中,环状物设置在波导的芯中。 在另一个实施例中,环与芯相同心。 在另一个实施例中,环具有预定的宽度和半径。 在另一个实施例中,光波导包括环形,其设置在对应于芯中的区域的径向位置处,其中期望模式基本上不具有能量。 在另一个实施例中,期望的模式包括LP02模式。 在另一个实施例中,环形空间包括散射材料。 在另一个实施方案中,环状物包括导电掺杂剂材料。 另一个实施例包括芯内折射率的急剧变化。 其他实施例包括在波导的芯中设置增加折射率的区域以衰减不期望的模式。 另一实施例包括在波导的芯中布置降低折射率的区域以衰减不期望的模式。 其他实施例包括环的组合。 环的这些组合可以包括例如吸收环,散射环,包含导电掺杂剂材料的环,折射率增加的区和折射率降低的区或其任何组合。
    • 5. 发明申请
    • HIGH PERFORMANCE SINGLE MODE WAVEGUIDE
    • 高性能单模波形
    • WO99026094A1
    • 1999-05-27
    • PCT/US1998/021871
    • 1998-10-15
    • G02B6/02G02B6/036G02B6/22G02B6/16
    • G02B6/03644G02B6/02014G02B6/02228G02B6/02271G02B6/0286G02B6/03611
    • Disclosed is a single mode optical waveguide fiber having a segmented core design. In particular, the core comprises three segments (2, 6, 8), each having characteristic dimensions and refractive index profile. By proper choice of index profile in each segment, a waveguide fiber is made which has a mode field diameter of about 9.5, low, positive total dispersion over the operating window 1530 nm to 1565 nm as well as effective area greater than 60 mu m . The profile is further defined by the inner and outer profile volume and the ratio of outer to inner volume. Thus, inner volume is in the range 2.28 to 3.26 % mu m , the outer profile volume is in the range 3.70 to 13.75 % mu m , and the ratio of outer to inner volume is in the range 1.5 to 4.3.
    • 公开了具有分段核设计的单模光纤。 特别地,芯包括三个段(2,6,8),每个具有特征尺寸和折射率分布。 通过适当地选择每个段中的折射率分布,制造了一个波导光纤,其在工作窗口1530nm至1565nm处具有约9.5的模场直径,低的正的总色散,以及大于60μm的有效面积, 2>。 轮廓进一步由内外轮廓体积和外部与内部体积的比率限定。 因此,内容积在2.28〜3.26%m 2的范围内,外型面积在3.70〜13.75%m 2的范围内,外容积与内容积之比在1.5〜 4.3。
    • 6. 发明申请
    • 分散フラットファイバ
    • 分散平板纤维
    • WO2004104659A1
    • 2004-12-02
    • PCT/JP2004/007122
    • 2004-05-19
    • 日本電信電話株式会社三菱電線工業株式会社久保田 寛和川西 悟基田中 正俊山取 真也
    • 久保田 寛和川西 悟基田中 正俊山取 真也
    • G02B6/00
    • G02B6/03666G02B6/02228G02B6/02333G02B6/02338G02B6/02357G02B6/024
    • 偏波保持特性をもち、かつ少なくとも一つの偏波モードの群速度分散の波長依存性が小さい特性を有する分散フラットファイバを提供する。分散フラットファイバ(10)は、中心の高屈折率部(11)とその周辺の低屈折率部(12)からなるコア部と、光ファイバの断面において概略一定間隔をおいて概略一様に分散配置された多数の空孔(13,14)が形成されたクラッド部とを有し、その空孔の配置を光ファイバの断面においてコア部の中心を対称軸とする2回以下の回転対称にして、偏波モードの縮退を解いたフォトニック結晶構造を有し、かつ動作波長における群速度分散の波長依存性が通常の単一モードファイバより小さく、コア部のみ群速度分散が正常分散である構成を有する。
    • 一种具有偏振保持特征的分散平面光纤和在至少一种偏振模式下组速度色散的小波长依赖性的特征。 分散平面纤维(10)包括由中心处的高折射率部分(11)和其周围的低折射率部分(12)组成的核心单元,以及形成有许多孔的包层单元 (13,14)在光纤的截面中以几乎恒定的间隔几乎均匀地分散和布置,其中孔被布置成使得它们相对于芯单元的中心以至多两匝的旋转对称的方式被设置为 在光纤的截面中的对称轴,并且光纤具有从偏振模的退化释放的光子晶体结构,并且其结构使得在操作波长处的组速度色散的波长依赖性小于正常波长的波长依赖性 核心单元的单模光纤和组速度色散仅为正常色散。
    • 7. 发明申请
    • OPTIC FIBER STRUCTURE FOR EFFICIENT USE OF OPTICAL PUMP ENERGY IN THREE-LEVEL RARE-EARTH DOPED FIBER LASER
    • 光纤光纤结构在三级稀土光纤激光器中有效利用光泵能量
    • WO2003042735A1
    • 2003-05-22
    • PCT/IB2002/004694
    • 2002-11-11
    • RAYTEQ PHOTONIC SOLUTIONS LTD.PATLAKH, AnatolySOLODOVNIKOV, Vladimir, V.
    • PATLAKH, AnatolySOLODOVNIKOV, Vladimir, V.
    • G02B6/02
    • G02B6/02228G02B6/02357G02B6/02361H01S3/06708H01S3/06729H01S3/06737H01S3/0675H01S3/094007H01S3/1618
    • A fiber optic structure for efficient pumping of a rare-earth element fiber (50) laser, such as an Ytterbium fiber laser, operating at the three-level transition. In order to operate at the three-level transition, a large amount of pumping energy must be effectively coupled from the fiber's inner cladding into the rare-earth element-doped core (52). The present invention discloses the use of eccentric, asymmetric, and non-cylindrical inner claddings (54) to maximize the overlap of the pumping energy of multi-mode field distribution patterns with the fiber core and to maximize the number of intersections of the pumping optical ray trajectories with the core. While the cladding surrounding the core is eccentric with respect to the core (52), the core itself is coaxial with the outer cladding (58) for compatibility in coupling to standard transmission fibers. Also disclosed is the use of air claddings and methods for optimal sizing of the capillaries (56). In addition, the creation of regions of differing index of refraction in the cladding is disclosed, to further enhance mode conversion of pumping energy.
    • 一种用于高效泵浦稀土元素光纤(50)激光器(例如镱光纤激光器)的光纤结构,其工作在三电平转换。 为了在三电平转换中工作,必须将大量的泵送能量从光纤的内包层有效地耦合到稀土元素掺杂的磁芯(52)中。 本发明公开了使用偏心,非对称和非圆柱形内包层(54)来最大化多模场分布图案与纤维芯的泵浦能量的重叠,并使泵浦光学器件的交点数量最大化 射线轨迹与核心。 虽然围绕芯的包层相对于芯(52)是偏心的,但是芯本身与外包层(58)同轴,用于与标准传输光纤耦合。 还公开了使用空气包层和方法来优化毛细管(56)的尺寸。 此外,公开了在包层中产生不同折射率的区域,以进一步增强泵浦能量的模式转换。