公开(公告)号：EP1148360A2

公开(公告)日：2001-10-24

申请号：EP01301432.9

申请日：2001-02-19

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Ranka, Jinendra Kumar ,  Reed, William Alfred ,  Windeler, Robert Scott

IPC: G02B6/16

CPC classification number: G02B6/02366 ,  B82Y20/00 ,  G02B6/02266 ,  G02B6/29377

Abstract: A fiber optic system comprises an optical transmitter, an optical receiver, and an optical fiber transmission path that optically couples the transmitter and the receiver to one another. The transmission path includes a first section that has negative dispersion at an operating wavelength λ o greater than about 1300 nm and a second section that includes a MOF. The MOF has relatively large anomalous dispersion at λ o and is sufficiently long to compensate the accumulated negative dispersion in the first section. In one embodiment the MOF comprises a core, a lower index cladding that includes one or more layers of air holes surrounding the core, characterized in that the diameter of the core is less than about 8 µm and the difference in effective refractive index between the core and cladding is greater than about 0.1 (10%). Preferably, the cladding contains no more than 2 layers of air holes and the distance between the nearest edges of adjacent air holes is less than about 1 µm.

Abstract translation: 光纤系统包括光发射机，光接收机和将发射机和接收机彼此光耦合的光纤传输路径。 传输路径包括在大于约1300nm的工作波长λo处具有负色散的第一部分和包括MOF的第二部分。 MOF在λo处具有相对较大的异常色散，并且足够长以补偿第一部分中的累积负色散。 在一个实施例中，MOF包括芯，低折射率包层，其包括围绕芯的一层或多层空气孔，其特征在于，芯的直径小于约8μm，并且有效折射率之间的差异在 芯和包层大于约0.1（10％）。 优选地，包层包含不超过2层的气孔，并且相邻气孔的最近边缘之间的距离小于约1μm。

公开(公告)号：EP1076428B1

公开(公告)日：2007-11-07

申请号：EP00306497.9

申请日：2000-07-31

Applicant: Lucent Technologies Inc.

Inventor： Ranka, Jinendra Kumar ,  Stentz, Andrew John

IPC: H04B10/17 ,  G02F2/00 ,  H04J14/02 ,  G02F1/35

CPC classification number: H04B10/291 ,  G02F1/353 ,  G02F1/3536 ,  H04B2210/258

公开(公告)号：EP1130427A3

公开(公告)日：2005-01-12

申请号：EP01301452.7

申请日：2001-02-19

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Ranka, Jinendra Kumar ,  Windeler, Robert Scott

IPC: G02B6/16

CPC classification number: G02B6/02366 ,  G02B6/02214

Abstract: A properly designed MOF can simultaneously exhibit large anomalous dispersion at visible and near infrared wavelengths and support numerous transverse spatial modes that are essentially decoupled from one another, even in the presence of significant perturbations. In a MOF that includes an inner cladding region comprising at least one thin layer of air holes surrounding a core region, the key is to achieve a relatively large wave vector mismatch between the lowest order modes by appropriate design of the size of the core region and of the effective refractive index difference between the core region and the inner cladding region. In accordance with one aspect of our invention, MOFs are designed to exhibit simultaneously relatively large anomalous dispersion and essentially decoupled transverse spatial modes by making the diameter of the core region less than about 6 µm and the difference in effective refractive index between the core and cladding regions greater than about 0.1 (10%). Preferably, the cladding region contains no more than 2 layers of air holes, and the distance between the nearest edges of adjacent air holes is less than about 1 µm. MOFs with these features enable several embodiments of our invention. One embodiment is a nonlinear optical system comprising an optical pump source, an optical signal source, a utilization device and an optical fiber transmission path that optically couples the sources to the device. The transmission path includes at least a section of MOF in which at least two transverse modes are decoupled from one another over the length of the MOF section, the output of the pump source propagating in one of the transverse modes and the output of the signal source propagating in another of the transverse modes. Another embodiment is an optical transmission system comprising an optical transmitter, a utilization device and an optical fiber transmission path that optically couples the transmitter and the utilization device. The transmission path includes at least a section of MOF in which at least two of the transverse modes are decoupled from one another over the length of the MOF section, and further includes a first modulator for impressing information on a first optical signal to be propagated along the MOF in one of the transverse modes and a second modulator for impressing information on a second optical signal to be propagated along the MOF in another of the transverse modes.

公开(公告)号：EP1054273A2

公开(公告)日：2000-11-22

申请号：EP00303895.7

申请日：2000-05-09

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Ranka, Jinendra Kumar ,  Windeler, Robert Scott

IPC: G02B6/16

CPC classification number: G02B6/02366 ,  G02B6/02004 ,  G02B6/02214 ,  G02B6/02333 ,  G02B6/02361 ,  G02B6/02385 ,  G02F1/365 ,  G02F2001/3528 ,  G02F2202/32

Abstract: Properly designed optical waveguides exhibit anomalous (positive) dispersion over a continuum of visible and near infrared wavelengths and, in one embodiment, the fiber has zero-dispersion at a visible wavelength (e.g., about 760 nm). Preferably, the zero-dispersion point occurs at a vis-nir wavelength where the normal (negative) material dispersion is relatively high and the effective refractive index difference between the core and the cladding is sufficiently large that the anomalous (positive) waveguide dispersion compensates the normal material dispersion. Illustratively, the optical waveguide is a microstructured fiber comprising a solid silica core surrounded by an inner cladding that includes a plurality of capillary air holes that allow for index-guiding within the core. The pattern formed by the cross-sections of the air holes, typically circles, may take on a variety geometric configurations, such as a closely packed hexagon or triangle. Alternatively, the cross-section of the air holes may form two mating, essentially semicircular regions on either side of a core that is supported by a pair of radial webs. As a result of the novel dispersion characteristics of the microstructured fibers combined with small effective area cores, we have demonstrated several applications of the invention that, in the prior art of standard single-mode fibers, have been possible only at wavelengths greater than about 1300 nm, including pulse compression, bright soliton propagation, fundamental mode-to-fundamental mode second harmonic generation, and broadband continuum generation in the visible.

Abstract translation: 适当设计的光波导呈现反常（正的）色散在可见光和近红外波长的连续，并且在一个实施例中，纤维具有在可见波长（例如，约760nm）零色散。 优选地，所述零色散点在VIS-NIR波长，其中正常（负）的材料色散相对较高并且在芯和包层之间的有效折射率差发生足够大做了反常（正的）波导色散补偿 正常材料色散。 说明性地，该光波导是微结构化的光纤，其包括通过在内部包层包围的固体二氧化硅芯包括没有的毛细管空气的多个通孔并允许折射率波导的核心内。 由空气孔，通常圆的横截面所形成的图案可以采用多种几何构造，检查作为紧密堆积六边形或三角形。 可替代地，空气孔的横截面可以形成两个配合，基本上在芯一左一右半圆形区域也被一对径向网状物支撑。 由于结构化纤维与小有效面积核相结合的微的新颖色散特性的结果，我们已实例阐述了本发明的几个应用程序，标准单模光纤的在现有技术中，已经有可能仅在波长大于约1300 纳米，包括脉冲压缩，亮孤子传播，基本模式到模式从根本上二次谐波生成，和宽带连续谱产生在可见。

公开(公告)号：EP1148360A3

公开(公告)日：2004-06-23

申请号：EP01301432.9

申请日：2001-02-19

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Ranka, Jinendra Kumar ,  Reed, William Alfred ,  Windeler, Robert Scott

IPC: G02B6/16

CPC classification number: G02B6/02366 ,  B82Y20/00 ,  G02B6/02266 ,  G02B6/29377

Abstract: A fiber optic system comprises an optical transmitter, an optical receiver, and an optical fiber transmission path that optically couples the transmitter and the receiver to one another. The transmission path includes a first section that has negative dispersion at an operating wavelength λ o greater than about 1300 nm and a second section that includes a MOF. The MOF has relatively large anomalous dispersion at λ o and is sufficiently long to compensate the accumulated negative dispersion in the first section. In one embodiment the MOF comprises a core, a lower index cladding that includes one or more layers of air holes surrounding the core, characterized in that the diameter of the core is less than about 8 µm and the difference in effective refractive index between the core and cladding is greater than about 0.1 (10%). Preferably, the cladding contains no more than 2 layers of air holes and the distance between the nearest edges of adjacent air holes is less than about 1 µm.

公开(公告)号：EP1076428A2

公开(公告)日：2001-02-14

申请号：EP00306497.9

申请日：2000-07-31

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Ranka, Jinendra Kumar ,  Stentz, Andrew John

IPC: H04B10/17 ,  G02F2/00 ,  H04J14/02

CPC classification number: H04B10/291 ,  G02F1/353 ,  G02F1/3536 ,  H04B2210/258

Abstract: The present invention uses wavelength conversion to increase the bandwidth of optical communication systems. In an exemplary embodiment, a combination of wavelength conversion and amplification with a discrete optical amplifier (OA) to allow communications systems to operate in wavelength bands λ' outside the gain bandwidth of the OA. A transmitter launches signal channels (λ 1 ', λ 2 ',...,λ' N ) that are outside the gain bandwidth λ. A wavelength conversion device upstream of the amplifier maps channels λ' 1 , λ' 2 ,...λ' N to corresponding wavelengths λ 1 , λ 2 , ...λ N within λ. The OA directly amplifies the converted signals and a second wavelength conversion device downstream of the amplifier maps the amplified signals back to the original channels λ' 1 , λ' 2 ,...λ' N . This increases the capacity of the optical communication systems by facilitating the use of both signals that lie within the OA gain bandwidth λ and signals that can be converted to wavelengths within λ. Associated wavelength converters, transmitters and receivers are also described.
This approach applies not only to the use of EDFAs, but also to gain-flattening elements, dispersion-compensating fibers, variable attenuators, and any intermediate components having bandwidths smaller than the transmission fiber.

Abstract translation: 本发明使用的波长转换，以增加光通信系统的带宽。 在一个示例性的，本实施方式的波长转换和放大的组合与离散的光放大器（OA），以允许通信系统在OA的增益带宽之外的波长带的λ”操作。 发射机发射的信号通道（拉姆达1“ 2' 拉姆达，...，拉姆达” N）并为增益带宽拉姆达外部。 波长转换装置的放大器的地图信道的λ的上游“1，λ-” 2，...拉姆达“N对应的波长的拉姆达1，λ-2，...拉姆达内拉姆达ñ。 的OA直接放大该转换的信号和放大器映射将放大的信号返回到原始信道的λ“1，λ-” 2，...拉姆达“N的下游的第二波长转换装置 这通过促进使用这两个信号的并位于内OA的增益带宽和λ信号也可以拉姆达内被转换为波长增加了光通信系统的容量。 相关联的波长转换器，即，发射机和接收机中描述。 这种方法不仅适用于使用掺铒光纤放大器的，但如此获得平整的元件，色散补偿光纤，可变衰减器，以及具有比带宽传输光纤较小任何中间部件。

公开(公告)号：EP1054273A3

公开(公告)日：2005-06-01

申请号：EP00303895.7

申请日：2000-05-09

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Ranka, Jinendra Kumar ,  Windeler, Robert Scott

IPC: G02B6/16

CPC classification number: G02B6/02366 ,  G02B6/02004 ,  G02B6/02214 ,  G02B6/02333 ,  G02B6/02361 ,  G02B6/02385 ,  G02F1/365 ,  G02F2001/3528 ,  G02F2202/32

Abstract: Properly designed optical waveguides exhibit anomalous (positive) dispersion over a continuum of visible and near infrared wavelengths and, in one embodiment, the fiber has zero-dispersion at a visible wavelength (e.g., about 760 nm). Preferably, the zero-dispersion point occurs at a vis-nir wavelength where the normal (negative) material dispersion is relatively high and the effective refractive index difference between the core and the cladding is sufficiently large that the anomalous (positive) waveguide dispersion compensates the normal material dispersion. Illustratively, the optical waveguide is a microstructured fiber comprising a solid silica core surrounded by an inner cladding that includes a plurality of capillary air holes that allow for index-guiding within the core. The pattern formed by the cross-sections of the air holes, typically circles, may take on a variety geometric configurations, such as a closely packed hexagon or triangle. Alternatively, the cross-section of the air holes may form two mating, essentially semicircular regions on either side of a core that is supported by a pair of radial webs. As a result of the novel dispersion characteristics of the microstructured fibers combined with small effective area cores, we have demonstrated several applications of the invention that, in the prior art of standard single-mode fibers, have been possible only at wavelengths greater than about 1300 nm, including pulse compression, bright soliton propagation, fundamental mode-to-fundamental mode second harmonic generation, and broadband continuum generation in the visible.

公开(公告)号：EP1076428A3

公开(公告)日：2003-08-27

申请号：EP00306497.9

申请日：2000-07-31

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Ranka, Jinendra Kumar ,  Stentz, Andrew John

IPC: H04B10/17 ,  G02F2/00 ,  H04J14/02 ,  G02F1/35

CPC classification number: H04B10/291 ,  G02F1/353 ,  G02F1/3536 ,  H04B2210/258

Abstract: The present invention uses wavelength conversion to increase the bandwidth of optical communication systems. In an exemplary embodiment, a combination of wavelength conversion and amplification with a discrete optical amplifier (OA) to allow communications systems to operate in wavelength bands λ' outside the gain bandwidth of the OA. A transmitter launches signal channels (λ 1 ', λ 2 ',...,λ' N ) that are outside the gain bandwidth λ. A wavelength conversion device upstream of the amplifier maps channels λ' 1 , λ' 2 ,...λ' N to corresponding wavelengths λ 1 , λ 2 , ...λ N within λ. The OA directly amplifies the converted signals and a second wavelength conversion device downstream of the amplifier maps the amplified signals back to the original channels λ' 1 , λ' 2 ,...λ' N . This increases the capacity of the optical communication systems by facilitating the use of both signals that lie within the OA gain bandwidth λ and signals that can be converted to wavelengths within λ. Associated wavelength converters, transmitters and receivers are also described. This approach applies not only to the use of EDFAs, but also to gain-flattening elements, dispersion-compensating fibers, variable attenuators, and any intermediate components having bandwidths smaller than the transmission fiber.

公开(公告)号：EP1130427A2

公开(公告)日：2001-09-05

申请号：EP01301452.7

申请日：2001-02-19

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Ranka, Jinendra Kumar ,  Windeler, Robert Scott

IPC: G02B6/16

CPC classification number: G02B6/02366 ,  G02B6/02214

Abstract: A properly designed MOF can simultaneously exhibit large anomalous dispersion at visible and near infrared wavelengths and support numerous transverse spatial modes that are essentially decoupled from one another, even in the presence of significant perturbations. In a MOF that includes an inner cladding region comprising at least one thin layer of air holes surrounding a core region, the key is to achieve a relatively large wave vector mismatch between the lowest order modes by appropriate design of the size of the core region and of the effective refractive index difference between the core region and the inner cladding region. In accordance with one aspect of our invention, MOFs are designed to exhibit simultaneously relatively large anomalous dispersion and essentially decoupled transverse spatial modes by making the diameter of the core region less than about 6 µm and the difference in effective refractive index between the core and cladding regions greater than about 0.1 (10%). Preferably, the cladding region contains no more than 2 layers of air holes, and the distance between the nearest edges of adjacent air holes is less than about 1 µm. MOFs with these features enable several embodiments of our invention. One embodiment is a nonlinear optical system comprising an optical pump source, an optical signal source, a utilization device and an optical fiber transmission path that optically couples the sources to the device. The transmission path includes at least a section of MOF in which at least two transverse modes are decoupled from one another over the length of the MOF section, the output of the pump source propagating in one of the transverse modes and the output of the signal source propagating in another of the transverse modes. Another embodiment is an optical transmission system comprising an optical transmitter, a utilization device and an optical fiber transmission path that optically couples the transmitter and the utilization device. The transmission path includes at least a section of MOF in which at least two of the transverse modes are decoupled from one another over the length of the MOF section, and further includes a first modulator for impressing information on a first optical signal to be propagated along the MOF in one of the transverse modes and a second modulator for impressing information on a second optical signal to be propagated along the MOF in another of the transverse modes.

Abstract translation: 正确设计的MOF可以在可见光和近红外波长处同时显示出大的异常色散，并且支持许多横向空间模式，即使在存在明显扰动的情况下，它们基本上是相互分离的。 在包括包围至少一个围绕芯区域的空气孔的薄层的内包层区域的MOF中，关键是通过适当设计芯区域的尺寸并实现最低阶模之间的相对大的波矢量失配， 的芯区域和内包层区域之间的有效折射率差。 根据本发明的一个方面，MOFs被设计成通过使核心区域的直径小于约6μm并且核心和/或核心区域之间的有效折射率差异而同时呈现相对较大的异常色散和基本上去耦的横向空间模式 包层区域大于约0.1（10％）。 优选地，包层区域包含不超过2层的空气孔，并且相邻气孔的最近边缘之间的距离小于约1μm。 具有这些特征的MOF能够实现本发明的几个实施例。 一个实施例是一种非线性光学系统，其包括光源，光信号源，利用装置和光源将光源耦合到装置的光纤传输路径。 传输路径包括MOF的至少一部分，其中至少两个横向模式在MOF部分的长度上彼此解耦，泵浦源的输出以横向模式之一传播，并且信号源的输出 在另一种横向模式下传播。 另一个实施例是一种光传输系统，其包括光发射机，利用装置和光纤传输路径，光路耦合发射机和利用装置。 传输路径包括MOF的至少一部分，其中至少两个横向模式在MOF部分的长度上彼此去耦，并且还包括第一调制器，用于在第一光信号上施加信息以沿着 在一个横向模式中的MOF和用于在另一个横向模式中沿着MOF传播的第二光信号上施加信息的第二调制器。