公开(公告)号：US20020181910A1

公开(公告)日：2002-12-05

申请号：US10148906

申请日：2002-06-03

Inventor： Melanie Holmes

IPC: G02B006/18 ,  G02B006/16 ,  G02B006/26

CPC classification number: G02B6/0281 ,  G02B6/0283 ,  G02B6/03633 ,  G02B6/03694 ,  G02B6/13 ,  G02B6/262 ,  G02B6/29307 ,  G02B6/29308 ,  G02B6/2931 ,  G02B6/3512 ,  G02B6/3546 ,  G02B6/3548 ,  G02B6/3582 ,  G02B6/3833

Abstract: An optical fiber (12), which presents a beam expanding feature, has a core, an inner cladding, an outer cladding and a sheath. The inner cladding is doped with a photosensitive material like germanium. By using ultra-violet radiation (16) from a copper laser (18) having a Gaussian energy distribution, a refractive index taper may be created inside the fiber. Therefore the tapered fiber has a larger effective area in the coupling region (20), and insertion losses are reduced.

Abstract translation: 具有光束扩展特征的光纤（12）具有芯，内包层，外包层和护套。 内包层用诸如锗的感光材料掺杂。 通过使用具有高斯能量分布的铜激光器（18）的紫外辐射（16），可以在光纤内产生折射率锥度。 因此，锥形光纤在耦合区域（20）中具有较大的有效面积，并且插入损耗减小。

公开(公告)号：US20020176678A1

公开(公告)日：2002-11-28

申请号：US10086413

申请日：2002-03-04

Applicant: The Furukawa Electric Co., Ltd.

Inventor： Kazunori Mukasa

IPC: G02B006/22 ,  G02B006/16

CPC classification number: G02B6/03644 ,  G02B6/02261 ,  G02B6/0228 ,  G02B6/02285 ,  G02B6/0281 ,  G02B6/03627

Abstract: An optical fiber includes center and first side cores. An apparent refractive index differences of the center and first side cores are 1.15 to 1.40% and null0.60 to null0.35, respectively. A constant expressing a profile of a distribution of refractive index of the center core is 1.0 to 5.0. A ratio of diameters of the first side and center cores is 1.6 to 2.4. A dispersion value is null60 to null35 ps/nm/km, a dispersion slope is null0.40 to null0.10 ps/nm2/km, a transmission loss is 0 to 0.35 dB/km, a ratio of loss to dispersion is 120 to 500 (ps/nm)/dB, a polarization mode dispersion is 0 to 0.15 ps/{square root}{square root over (km)}, and an effective core area is 19 to 50 nullm2 when the wavelength is 1.55 nullm band. A bending loss at a diameter of 20 mm is 0 to 5 dB/m.

Abstract translation: 光纤包括中心和第一侧芯。 中心和第一侧芯的表观折射率差分别为1.15〜1.40％和-0.60〜-0.35。 表示中心纤芯的折射率分布的曲线的常数为1.0〜5.0。 第一侧芯和中心芯的直径比为1.6〜2.4。 色散值为-60〜-35ps / nm / km，色散斜率为-0.40〜-0.10ps / nm2 / km，传输损耗为0〜0.35dB / km，损耗与色散的比为120〜 500（ps / nm）/ dB，偏振模色散为0〜0.15ps / {平方根} {平方根（km），当波长为1.55μm带时，有效芯面积为19〜50mum2弯曲 直径为20mm的损耗为0〜5dB / m。

公开(公告)号：US20020172483A1

公开(公告)日：2002-11-21

申请号：US10128876

申请日：2002-04-24

Inventor： John Burnette MacChesney ,  Thomas Edward Stockert ,  Patrick William Wisk ,  Man Fei Yan

IPC: G02B006/18 ,  G02B006/16

CPC classification number: G02B6/02076 ,  G02B6/02 ,  G02B6/021 ,  G02B6/02138 ,  G02B6/03688 ,  G02B6/03694 ,  G02B6/102 ,  G02B6/2852 ,  G02B6/4469

Abstract: The specification describes optical fibers that are constructed to prevent theft of optical signals. One construction is designed to block access of the core of the fiber to the nullwritingnull radiation necessary to form a grating tap. In this embodiment the optical fiber cladding is provided with a highly absorbing UV layer. In a variation of this embodiment, one or more additional optical paths are provided in the optical fiber to accommodate monitoring signals. The added optical paths allow monitoring signals to be transmitted in the optical fiber, separate from the information signal, to signal an attempt to breach the outer coating or the cladding of the optical fiber. A second case of intrusion is addressed by increasing the sensitivity of the optical fiber to microbending loss to the extent that bends in the fiber cause such high attenuation of the signal that the bends do not go undetected at the receiving station.

Abstract translation: 该规范描述了被构造为防止光信号被盗的光纤。 一种结构被设计成阻挡光纤的核心到形成光栅丝锥所需的“写入”辐射。 在该实施例中，光纤包层设置有高吸收UV层。 在该实施例的变型中，在光纤中提供一个或多个附加光路以适应监视信号。 所添加的光路允许在光纤中传输监测信号，与信息信号分离，以表示尝试破坏光纤的外涂层或包层。 第二种入侵案例是通过将光纤的灵敏度提高到微弯损耗来解决的，使得光纤弯曲会导致信号的这种高衰减，使得弯曲在接收站处不被检测到。

公开(公告)号：US20020168171A1

公开(公告)日：2002-11-14

申请号：US09837282

申请日：2001-04-19

Inventor： Kenneth A. Puzey

IPC: G02B006/16

CPC classification number: G02B6/02 ,  G02B6/02214

Abstract: An optical fiber includes a core for guiding light of a specified range of wavelengths therethrough, each wavelength in the specified range of wavelengths traveling through the core at a particular group velocity and the light potentially producing a nonlinear optical effect. The optical fiber also includes a cladding formed around the core for substantially containing the light within the core. The optical fiber further includes a predetermined amount of at least one dopant uniformly dispersed throughout the core such that no two distinct wavelengths in the specified range of wavelengths travel through the core at the same, particular group velocity, thereby causing the nonlinear optical effect to be suppressed.

Abstract translation: 光纤包括用于引导指定范围的波长的光的芯，每一波长在规定的波长范围内以特定组速度传播通过芯，并且该光可能产生非线性光学效应。 光纤还包括形成在芯周围的用于基本上包含芯内的光的包层。 光纤还包括预定量的至少一种掺杂剂均匀分散在整个芯中，使得在规定波长范围内没有两个不同的波长以相同的特定组速度穿过芯，从而使非线性光学效应为 被压制

公开(公告)号：US20020168161A1

公开(公告)日：2002-11-14

申请号：US10120965

申请日：2002-04-10

Inventor： Jonathan Hugh Vaughan Price ,  Kentaro Furasawa ,  David John Richardson ,  Tanya Monro

IPC: G02B006/16 ,  G02B006/20 ,  G02B006/26

CPC classification number: H01S3/06708 ,  G02F1/3513 ,  H01S2301/085

Abstract: A source of optical pulses, comprises an optical source operable to generate ultrashort optical pulses at a first wavelength; and an optical fiber amplifier comprising an optical fiber having a core containing a dopant to provide optical gain at the first wavelength, and anomalous dispersion over a wavelength range including the first wavelength and a second wavelength. The optical fiber receives the ultrashort optical pulses, amplifies the ultrashort optical pulses, and alters the wavelength of the ultrashort optical pulses to at least the second wavelength by the soliton-self-frequency shifting effect. Microstructured and/or tapered fibers can be used to provide the required dispersion characteristics. Pulses can be generated in one of three spectral regimes-monocolor solitons, multicolor solitons and continuous broadband spectra by adjusting the energy of the optical pulses, and tunability can be achieved by varying the power of pump light provided to the amplifier.

Abstract translation: 光脉冲源包括可操作以产生第一波长的超短光脉冲的光源; 以及光纤放大器，包括具有包含掺杂剂的芯的光纤，以提供第一波长的光增益，以及包括第一波长和第二波长的波长范围的异常色散。 光纤接收超短光脉冲，放大超短光脉冲，并通过孤子自变频效应将超短光脉冲的波长改变为至少第二波长。 微结构和/或锥形纤维可用于提供所需的分散特性。 可以通过调整光脉冲的能量，在三个光谱方式 - 单色孤子，多色孤子和连续宽带光谱之一中产生脉冲，并且可以通过改变提供给放大器的泵浦光的功率来实现可调谐性。

公开(公告)号：US20020168160A1

公开(公告)日：2002-11-14

申请号：US10108257

申请日：2002-03-28

Inventor： Masaaki Hirano ,  Akira Tada ,  Takatoshi Kato

IPC: G02B006/28 ,  G02B006/16

CPC classification number: G02B6/02233 ,  G02B6/02261 ,  G02B6/02271 ,  G02B6/02285 ,  G02B6/03666 ,  G02B6/03688 ,  G02B6/29377 ,  H04B10/2525 ,  H04B2210/258

Abstract: The present invention relates to an optical transmission line and the like having a chromatic dispersion with a small absolute value as a whole within a signal wavelength band including S, C, and L bands. This optical transmission line comprises a single-mode optical fiber and a dispersion-compensating optical fiber which are connected to each other; and has, as characteristics of the whole optical transmission line at a wavelength of 1550 nm, a chromatic dispersion with an absolute value of 4 ps/nm/km or less, and a dispersion slope of null0.015 ps/nm2/km or more but less than 0 ps/nm2/km. Its chromatic dispersion has a maximum value within a wavelength range of 1450 to 1530 nm, and a minimum value within a wavelength range of 1570 to 1620 nm.

Abstract translation: 本发明涉及在包括S，C和L波段的信号波长带内具有整体上绝对值小的色散的光传输线路等。 该光传输线包括彼此连接的单模光纤和色散补偿光纤; 并且作为整个光传输线的波长1550nm的特性，具有绝对值为4ps / nm / km或更小的色散和-0.015ps / nm2 / km或更大的色散斜率，但是 小于0ps / nm2 / km。 其色散在1450〜1530nm的波长范围内具有最大值，在1570〜1620nm的波长范围内具有最小值。

公开(公告)号：US20020164138A1

公开(公告)日：2002-11-07

申请号：US10097693

申请日：2002-03-12

Inventor： Manabu Saitou ,  Shoichiro Matsuo

IPC: G02B006/22 ,  G02B006/16

CPC classification number: G02B6/02242 ,  G02B6/02004 ,  G02B6/02261 ,  G02B6/03644 ,  G02B6/29377 ,  H04B10/2525

Abstract: A dispersion-compensating fiber is provided that can compensate chromatic dispersion of a DSF in the L-band (wavelength of 1.565 nullm to 1.625 nullm). The dispersion-compensating fiber is provided with a central core segment, an intermediate core segment, a ring core segment, and a clad, which are provided in this sequence concentrically from the inside, and has refractive index profile such that the refractive indices of these segments satisfy the relationship of intermediate core segment

Abstract translation: 提供了一种色散补偿光纤，其可以补偿L波段（波长为1.565mum至1.625mum）的DSF的色散。 色散补偿光纤具有中心芯部分，中间核心部分，环形芯部分和包层，该组织以这种顺序从内部同心地提供，并具有折射率分布，使得这些 段满足中间核心段<包层<=环芯段<中心核心段的关系。 当具有1.55μm±0.05μm的零色散波长的色散位移光纤已被补偿时，全部或部分L波段的残留色散在±1.5ps / nm / km以内。

公开(公告)号：US20020164137A1

公开(公告)日：2002-11-07

申请号：US10057258

申请日：2002-01-25

Inventor： Steven G. Johnson ,  Mihai Ibanescu ,  Ori Weisberg ,  Yoel Fink ,  John D. Joannopoulos ,  Maksim Skorobogatiy ,  Torkel Engeness ,  Marin Soljacic ,  Steven A. Jacobs

IPC: G02B006/20 ,  G02B006/16 ,  H04B010/12

CPC classification number: G02B6/02304 ,  B82Y20/00 ,  G02B6/02242 ,  G02B6/02261 ,  G02B6/02266 ,  G02B6/023 ,  G02B6/29377

Abstract: An optical waveguide including: a dielectric core region extending along a waveguide axis; and a dielectric confinement region surrounding the core about the waveguide axis, the confinement region comprising a photonic crystal structure having a photonic band gap, wherein during operation the confinement region guides EM radiation in at least a first range of frequencies to propagate along the waveguide axis, wherein the core has an average refractive index smaller than about 1.3 for a frequency in the first range of frequencies, and wherein the core a diameter in a range between about 4null and 80null, wherein null is a wavelength corresponding to a central frequency in the first frequency range.

Abstract translation: 一种光波导，包括：沿着波导轴延伸的介质芯区; 以及围绕所述波导轴围绕所述芯的介电限制区域，所述约束区域包括具有光子带隙的光子晶体结构，其中在操作期间，所述约束区域在至少第一频率范围内引导EM辐射沿着所述波导轴线传播 ，其中所述芯对于所述第一频率范围中的频率具有小于约1.3的平均折射率，并且其中所述芯的直径在约4lambd和80lambd之间的范围，其中，lamb是与所述第一频率中的中心频率相对应的波长 第一频率范围。

公开(公告)号：US20020154876A1

公开(公告)日：2002-10-24

申请号：US10072996

申请日：2002-02-12

Inventor： Mitsuhiro Kawasaki ,  Yohei Uchida ,  Hiroaki Oonuma

IPC: G02B006/18 ,  G02B006/16

CPC classification number: G02B6/03633 ,  G02B6/02019 ,  G02B6/02266 ,  G02B6/02271 ,  G02B6/0228 ,  G02B6/0286

Abstract: The optical fiber includes a center core portion, a side core portion and clad portion, which has a dispersion value of 14-20 ps/nm/km at a wavelength of 1550 nm, a dispersion slope of 0.05-0.08 ps/nm2/km at a wavelength of 1550 nm and a transmission attenuation of 0.2 dB/km or less at a wavelength of 1550 nm, wherein the relative refractive index difference null1 between the center core portion and the clad portion is 0.25-0.50%, the relative refractive index difference null2 between the side core portion and the clad portion is 0.05-0.30%, an inequality null2

Abstract translation: 该光纤包括中心芯部分，侧芯部分和包层部分，其在波长1550nm处的色散值为14-20ps / nm / km，色散斜率为0.05-0.08ps / nm2 / km 在1550nm的波长下，在1550nm的波长下的透射衰减为0.2dB / km以下，其中，中心纤芯部与包层部之间的相对折射率差DELTA1为0.25〜0.50％，相对折射率 侧芯部与包层部之间的差ΔTA2为0.05-0.30％，满足不等式DELTA2

公开(公告)号：US20020150364A1

公开(公告)日：2002-10-17

申请号：US09825362

申请日：2001-04-04

Inventor： Ian Bassett ,  John Canning

IPC: G02B006/16

CPC classification number: G02B6/02 ,  C03B37/01231 ,  C03B2203/14 ,  C03B2203/16 ,  C03B2203/22 ,  C03B2203/26 ,  C03B2203/42 ,  G02B6/02304 ,  G02B6/032 ,  G02B6/03622 ,  G02B6/03688

Abstract: An optical fibre adapted in a manner such that it guides an optical signal substantially only in one non-degenerate mode.

Abstract translation: 一种光纤，其方式使得其基本上仅以一个非简并模式引导光信号。