公开(公告)号：US07697197B2

公开(公告)日：2010-04-13

申请号：US12215939

申请日：2008-07-01

申请人： Phong Diep ,  James C. Fajardo

发明人： Phong Diep ,  James C. Fajardo

IPC分类号： H01S3/00

CPC分类号： H04B10/2916 ,  H04B10/25253

摘要： The present invention provides devices and methods for Raman amplification and dispersion compensation. According to one embodiment of the present invention, a dispersion compensating device includes a dispersion compensating fiber having a dispersion more negative than about −50 ps/nm/km over a wavelength range of about 1555 nm to about 1615 nm; a Raman gain fiber having a dispersion more positive than about −40 ps/nm/km over a wavelength range of about 1555 nm to about 1615 nm; and a pump source operatively coupled to the dispersion compensating fiber and the Raman gain fiber, the pump source operating at a pump wavelength, wherein the dispersion compensating fiber has a Raman Figure of Merit at the pump wavelength, and wherein the Raman gain fiber has a Raman Figure of Merit at least about equivalent to the Raman Figure of Merit of the dispersion compensating fiber, and wherein the dispersion compensating fiber and the Raman gain fiber are arranged in series between the input and the output of the device. The device provides higher Raman gain than a conventional Raman-pumped dispersion compensating device.

摘要翻译： 本发明提供拉曼放大和色散补偿的装置和方法。 根据本发明的一个实施例，色散补偿装置包括在约1555nm至约1615nm的波长范围内具有比约-50ps / nm / km更负的色散的色散补偿光纤; 在约1555nm至约1615nm的波长范围内具有比约-40ps / nm / km更正的色散的拉曼增益光纤; 以及泵浦源，其操作地耦合到所述色散补偿光纤和所述拉曼增益光纤，所述泵浦源以泵浦波长工作，其中所述色散补偿光纤具有在泵浦波长处的拉曼光谱图，并且其中所述拉曼增益光纤具有 拉曼品质因数至少大约相当于色散补偿光纤的拉曼品质因数，并且其中色散补偿光纤和拉曼增益光纤串联布置在设备的输入和输出之间。 该装置提供比常规拉曼泵浦色散补偿装置更高的拉曼增益。

公开(公告)号：US07102812B2

公开(公告)日：2006-09-05

申请号：US10659523

申请日：2003-09-09

申请人： Phong Diep ,  James C. Fajardo

发明人： Phong Diep ,  James C. Fajardo

IPC分类号： H04B10/12

CPC分类号： H04B10/2916 ,  H04B10/25253

摘要： The present invention provides devices and methods for Raman amplification and dispersion compensation. According to one embodiment of the present invention, a dispersion compensating device includes a dispersion compensating fiber having a dispersion more negative than about −50 ps/nm/km over a wavelength range of about 1555 nm to about 1615 nm; a Raman gain fiber having a dispersion more positive than about −40 ps/nm/km over a wavelength range of about 1555 nm to about 1615 nm; and a pump source operatively coupled to the dispersion compensating fiber and the Raman gain fiber, the pump source operating at a pump wavelength, wherein the dispersion compensating fiber has a Raman Figure of Merit at the pump wavelength, and wherein the Raman gain fiber has a Raman Figure of Merit at least about equivalent to the Raman Figure of Merit of the dispersion compensating fiber, and wherein the dispersion compensating fiber and the Raman gain fiber are arranged in series between the input and the output of the device. The device provides higher Raman gain than a conventional Raman-pumped dispersion compensating device.

摘要翻译： 本发明提供拉曼放大和色散补偿的装置和方法。 根据本发明的一个实施例，色散补偿装置包括在约1555nm至约1615nm的波长范围内具有比约-50ps / nm / km更负的色散的色散补偿光纤; 在约1555nm至约1615nm的波长范围内具有比约-40ps / nm / km更正的色散的拉曼增益光纤; 以及泵浦源，其操作地耦合到所述色散补偿光纤和所述拉曼增益光纤，所述泵浦源以泵浦波长工作，其中所述色散补偿光纤具有在泵浦波长处的拉曼光谱图，并且其中所述拉曼增益光纤具有 拉曼品质因数至少大约相当于色散补偿光纤的拉曼品质因数，并且其中色散补偿光纤和拉曼增益光纤串联布置在设备的输入和输出之间。 该装置提供比常规拉曼泵浦色散补偿装置更高的拉曼增益。

公开(公告)号：US07043125B2

公开(公告)日：2006-05-09

申请号：US10145327

申请日：2002-05-13

申请人： Phong Diep ,  James C. Fajardo ,  Ming-Jun Li ,  Daniel A. Nolan ,  Gang Qi

发明人： Phong Diep ,  James C. Fajardo ,  Ming-Jun Li ,  Daniel A. Nolan ,  Gang Qi

IPC分类号： G02B6/02

CPC分类号： G02B6/03666 ,  G02B6/02014 ,  G02B6/02223 ,  G02B6/02266 ,  G02B6/0281 ,  G02B6/03611 ,  G02B6/03627 ,  H04B10/25

摘要： Disclosed is a single mode optical waveguide fiber having a low cut off wavelength, and mode field diameter and bend resistance similar to step index single mode optical waveguide fiber designed for use at 1310 nm. By including a clad region of raised refractive index spaced apart from the core region of the single mode optical waveguide fiber, the cut off wavelength can be reduced to 850 nm. The single mode optical waveguide fiber in accord with the invention may also have a core region having a reduced refractive index on centerline surrounded by a region of higher refractive index and a clad region which is substantially uniform. The single mode optical waveguide fiber is thus ideally suited for use with the low cost, reliable VCSEL operating at 850 nm, a Fabry-Perot laser operating at 1310 nm, or a distributed feedback laser operating at 1550 nm thereby enabling low cost, easily installed, home access portions of the broadband telecommunications system.

公开(公告)号：US06987783B2

公开(公告)日：2006-01-17

申请号：US10741211

申请日：2003-12-19

申请人： James C. Fajardo ,  Michael T. Gallagher ,  Anping Liu ,  (Ying) Lisa Peng ,  Carlton M. Truesdale ,  Luis A. Zenteno

发明人： James C. Fajardo ,  Michael T. Gallagher ,  Anping Liu ,  (Ying) Lisa Peng ,  Carlton M. Truesdale ,  Luis A. Zenteno

IPC分类号： H01S3/30

CPC分类号： H01S3/063 ,  H01S3/06729 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/094042 ,  H01S3/094069 ,  H01S3/09415 ,  H01S3/2308

摘要： An optically-active air-clad fiber (30) includes a core (34, 84) that facilitates doping with an ion optically excitable and having a three-level optical transition when pumped at a first end (28) of an optical cavity (46) by a multimode pump source (72) at a pump wavelength (64) for lasing at a signal wavelength (66) different than the pump wavelength (64) at a second end (29) of the optical cavity (46), the core (34, 84) having a refractive index, wherein the core (34, 84) is transformed from the first end to proximate the second end (29) thereof such that the optically-active fiber (30) is multimode at the pump wavelength proximate to the first end (28), and is single-mode at the signal wavelength proximate to the second end (29). An air-clad (36, 86) surrounds at least one portion of the core (34, 84) and has a lower effective refractive index than the refractive index of the core (34, 84).

摘要翻译： 光学活性的空气包层光纤（30）包括：芯（34,84），其有助于掺杂有可激发的离子，并且当在光腔（46）的第一端（28）处泵浦时具有三电平的光学跃迁 ）通过泵浦波长（64）处的多模泵浦源（72），以在光腔（46）的第二端（29）处以不同于泵浦波长（64）的信号波长（66）激发，芯 （34,84），其具有折射率，其中所述芯（34,84）从所述第一端变换到其第二端（29）附近，使得所述光学有源光纤（30）在泵浦波长附近为多模 到第一端（28），并且在靠近第二端（29）的信号波长处是单模。 包层（36,86）围绕芯（34,84）的至少一部分并且具有比芯（34,84）的折射率更低的有效折射率。

公开(公告)号：US06810197B2

公开(公告)日：2004-10-26

申请号：US10322148

申请日：2002-12-18

申请人： Douglas C. Allan ,  John T. Brown ,  Lisa C. Chacon ,  Adam J. G. Ellison ,  James C. Fajardo ,  Stuart Gray ,  Keith L. House ,  Karl W. Koch, III ,  Dale R. Powers ,  James A. West

发明人： Douglas C. Allan ,  John T. Brown ,  Lisa C. Chacon ,  Adam J. G. Ellison ,  James C. Fajardo ,  Stuart Gray ,  Keith L. House ,  Karl W. Koch, III ,  Dale R. Powers ,  James A. West

IPC分类号： G02B600

CPC分类号： C03C13/045 ,  C03B37/01413 ,  C03B37/01446 ,  C03B37/01807 ,  C03B37/01823 ,  C03B37/01853 ,  C03B2201/20 ,  C03B2201/22 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2207/30 ,  C03B2207/36 ,  C03C4/0042 ,  C03C13/046 ,  G02B6/02 ,  G02B6/02228 ,  G02B6/02271 ,  G02B6/03644 ,  G02B6/03677 ,  G02B6/03694

摘要： An isotopically-altered, silica based optical fiber is provided having lower losses, broader bandwidth, and broader Raman gain spectrum characteristics than conventional silica-based fiber. A heavier, less naturally abundant isotope of silicon or oxygen is substituted for a lighter, more naturally abundant isotope to shift the infrared absorption to a slightly longer wavelength. In one embodiment, oxygen-18 is substituted for the much more naturally abundant oxygen-16 at least in the core region of the fiber. The resulting isotopically-altered fiber has a minimum loss of 0.044 dB/km less than conventional fiber, and a bandwidth that is 17 percent broader for a loss range between 0.044-0.034 dB/km. The fiber may be easily manufactured with conventional fiber manufacturing equipment by way of a plasma chemical vapor deposition technique. When a 50 percent substitution of oxygen-18 for oxygen-16 is made in the core region of the fiber, the Raman gain spectrum is substantially broadened.

摘要翻译： 提供了一种同位素改性的二氧化硅基光纤，其比传统的二氧化硅基光纤具有更低的损耗，更宽的带宽和更广泛的拉曼增益光谱特性。 更重，更不自然丰富的硅或氧的同位素代替较轻的，更自然的丰富的同位素，以将红外吸收转移到稍长的波长。 在一个实施方案中，氧-18至少在纤维的核心区域中替代天然丰富的氧-16。 所得到的同位素改变的光纤比常规光纤的损耗最小为0.044 dB / km，对于0.044-0.034 dB / km之间的损耗范围，宽带宽为17％。 纤维可以通过等离子体化学气相沉积技术容易地用常规纤维制造设备制造。 当在纤维的纤芯区域中进行氧-16取代氧-16的50％时，拉曼增益谱显着扩大。

公开(公告)号：US07411728B2

公开(公告)日：2008-08-12

申请号：US11473481

申请日：2006-06-23

申请人： Phong Diep ,  James C. Fajardo

发明人： Phong Diep ,  James C. Fajardo

IPC分类号： H04B10/17

CPC分类号： H04B10/2916 ,  H04B10/25253

摘要： The present invention provides devices and methods for Raman amplification and dispersion compensation. According to one embodiment of the present invention, a dispersion compensating device includes a dispersion compensating fiber having a dispersion more negative than about −50 ps/nm/km over a wavelength range of about 1555 nm to about 1615 nm; a Raman gain fiber having a dispersion more positive than about −40 ps/nm/km over a wavelength range of about 1555 nm to about 1615 nm; and a pump source operatively coupled to the dispersion compensating fiber and the Raman gain fiber, the pump source operating at a pump wavelength, wherein the dispersion compensating fiber has a Raman Figure of Merit at the pump wavelength, and wherein the Raman gain fiber has a Raman Figure of Merit at least about equivalent to the Raman Figure of Merit of the dispersion compensating fiber, and wherein the dispersion compensating fiber and the Raman gain fiber are arranged in series between the input and the output of the device. The device provides higher Raman gain than a conventional Raman-pumped dispersion compensating device.

摘要翻译： 本发明提供拉曼放大和色散补偿的装置和方法。 根据本发明的一个实施例，色散补偿装置包括在约1555nm至约1615nm的波长范围内具有比约-50ps / nm / km更负的色散的色散补偿光纤; 在约1555nm至约1615nm的波长范围内具有比约-40ps / nm / km更正的色散的拉曼增益光纤; 以及泵浦源，其操作地耦合到所述色散补偿光纤和所述拉曼增益光纤，所述泵浦源以泵浦波长工作，其中所述色散补偿光纤具有在泵浦波长处的拉曼光谱图，并且其中所述拉曼增益光纤具有 拉曼品质因数至少大约相当于色散补偿光纤的拉曼品质因数，并且其中色散补偿光纤和拉曼增益光纤串联布置在设备的输入和输出之间。 该装置提供比常规拉曼泵浦色散补偿装置更高的拉曼增益。

公开(公告)号：US06445862B1

公开(公告)日：2002-09-03

申请号：US09596916

申请日：2000-06-20

申请人： James C. Fajardo ,  V. Srikant ,  James A. West

发明人： James C. Fajardo ,  V. Srikant ,  James A. West

IPC分类号： G02B602

CPC分类号： G02B6/02333 ,  G02B6/02261 ,  G02B6/02338 ,  G02B6/02347 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/02366 ,  G02B6/0238 ,  G02B6/03677

摘要： A fiber optic waveguide is disclosed. The fiber optic waveguide includes a core region, and a moat region surrounding the core region. A cladding region surrounds the moat region and the core region. The cladding region includes a lattice of column structures disposed within a solid background matrix. A diameter of the core region is sized for making contact with the moat region for creating an extended core region at longer wavelengths. The core region, the moat region, and the cladding region function to produce unique dispersion compensating properties, which include negative dispersion and positive dispersion. The core region may be formed from a high index material and the moat region may be formed from a material having a refractive index lower than the refractive index of the core region. The cladding region is formed from a material having a refractive index which is higher than the index of the moat region and lower than the refractive index of core region.

摘要翻译： 公开了一种光纤波导。 光纤波导包括核心区域和围绕核心区域的护城河区域。 覆盖区域围绕护城河区域和核心区域。 包层区域包括布置在固体背景矩阵内的列结构的格子。 核心区域的直径的大小适于与护城河区域接触以在较长波长处产生延伸的核心区域。 核心区域，护环区域和包层区域产生独特的色散补偿特性，其包括负色散和正色散。 芯区域可以由高折射率材料形成，并且护环区域可以由折射率低于芯部区域的折射率的材料形成。 包层区域由折射率高于护城河区域的折射率并低于核心区域的折射率的材料形成。

公开(公告)号：US07082242B2

公开(公告)日：2006-07-25

申请号：US10356454

申请日：2003-01-31

申请人： James C. Fajardo ,  Michael T. Gallagher ,  James A. West

发明人： James C. Fajardo ,  Michael T. Gallagher ,  James A. West

IPC分类号： G02B6/02

CPC分类号： G02B6/02323 ,  C03B37/0253 ,  C03B37/02781 ,  C03B2203/14 ,  C03B2203/34 ,  C03B2203/42 ,  G02B6/02333 ,  G02B6/02338 ,  G02B6/02347 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/0238

摘要： The present invention relates to a microstructured optical fiber including a photonic band gap-guided core; and at least one index-guided core. Another embodiment of the present invention relates to a microstructured optical fiber including a set of main cores; a microstructured region surrounding the set of main cores; and at least alignment core, the alignment cores having substantially different optical propagation properties than the main cores. The present invention also includes methods for coupling, monitoring, and locating discontinuities in the fibers of the present invention.

摘要翻译： 本发明涉及一种包括光子带隙引导芯的微结构光纤; 和至少一个索引引导核心。 本发明的另一实施例涉及一种包括一组主芯的微结构光纤; 围绕该组芯的微结构化区域; 并且至少对准芯，对准芯具有与主芯基本上不同的光传播特性。 本发明还包括用于耦合，监测和定位本发明的纤维中的不连续性的方法。

公开(公告)号：US06847771B2

公开(公告)日：2005-01-25

申请号：US10171337

申请日：2002-06-12

申请人： James C. Fajardo ,  Michael T. Gallagher ,  James A. West ,  Natesan Venkataraman

发明人： James C. Fajardo ,  Michael T. Gallagher ,  James A. West ,  Natesan Venkataraman

IPC分类号： G02B6/00 ,  C03B37/012 ,  C03B37/027 ,  C03C13/04 ,  G02B6/02 ,  G02B6/032 ,  G02B6/20

CPC分类号： G02B6/02328 ,  C03B37/0122 ,  C03B37/02781 ,  C03B2201/24 ,  C03B2201/40 ,  C03B2203/14 ,  C03B2203/222 ,  C03B2203/42 ,  C03C13/04 ,  G02B6/02347 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/02371

摘要： A microstructured optical fiber is described. The microstructured optical fiber comprises an inner region and an outer region. The inner region includes an inner material and a plurality of holes formed in the inner material. The outer region surrounds the inner region, and includes an outer material. The softening point temperature of the inner material is greater than the softening point temperature of the outer material by at least about 50° C. Microstructured optical fiber preforms and methods for making the microstructured optical fibers are also described. The microstructured optical fiber may be made to have substantially undistorted holes in the inner region.

摘要翻译： 描述了微结构光纤。 微结构光纤包括内部区域和外部区域。 内部区域包括形成在内部材料中的内部材料和多个孔。 外部区域包围内部区域，并且包括外部材料。 内部材料的软化点温度比外部材料的软化点温度高至少约50℃。还描述了微结构化光纤预制件和制造微结构光纤的方法。 微结构化光纤可以在内部区域中具有基本上未失真的孔。

公开(公告)号：US06819852B2

公开(公告)日：2004-11-16

申请号：US10713241

申请日：2003-11-13

申请人： Douglas C. Allan ,  Nicholas F. Borrelli ,  James C. Fajardo ,  Karl W. Koch, III ,  James A. West

发明人： Douglas C. Allan ,  Nicholas F. Borrelli ,  James C. Fajardo ,  Karl W. Koch, III ,  James A. West

IPC分类号： G02B610

CPC分类号： B82Y20/00 ,  G02B6/02328 ,  G02B6/1225

摘要： Disclosed is a photonic band-gap crystal waveguide having the physical dimension of the photonic crystal lattice and the size of the defect selected to provide for optimum mode power confinement to the defect. The defect has a boundary which has a characteristic numerical value associated with it. The ratio of this numerical value to the pitch of the photonic crystal is selected to avoid surface modes found to exist in certain configurations of the photonic band-gap crystal waveguide. Embodiments in accord with the invention having circular and hexagonal defect cross sections are disclosed and described. A method of making the photonic band-gap crystal waveguide is also disclosed and described.

摘要翻译： 公开了具有光子晶格的物理尺寸和选择的缺陷的尺寸以提供对缺陷的最佳模式功率约束的光子带隙晶体波导。 缺陷具有与其相关联的特征数值的边界。 选择该数值与光子晶体的间距的比率以避免发现在光子带隙晶体波导的某些配置中存在的表面模式。 公开和描述了具有圆形和六边形缺陷横截面的本发明的实施例。 还公开并描述了制造光子带隙晶体波导的方法。