公开(公告)号：US08037717B2

公开(公告)日：2011-10-18

申请号：US10053365

申请日：2001-10-26

申请人： Steven B. Dawes ,  Daniel W. Hawtof ,  Michael T. Murtagh ,  John S. Rosettie ,  Andrew P. Schermerhorn ,  Merrill F. Sproul ,  John Stone, III ,  Pushkar Tandon

发明人： Steven B. Dawes ,  Daniel W. Hawtof ,  Michael T. Murtagh ,  John S. Rosettie ,  Andrew P. Schermerhorn ,  Merrill F. Sproul ,  John Stone, III ,  Pushkar Tandon

IPC分类号： C03B37/023

CPC分类号： C03B37/01446 ,  C03B37/0146 ,  C03B2201/12 ,  C03B2201/20

摘要： A method of manufacturing an optical waveguide preform includes providing a first process gas atmosphere to a soot preform contained in a vessel. The first atmosphere is held in the vessel for a first reacting time sufficient to at least partially dope or dry the soot preform. The vessel is then at least partially refilled with a second doping or drying atmosphere. The second doping or drying atmosphere is held in the vessel for a second reacting time sufficient to further dope or dry the soot preform.

摘要翻译： 一种制造光波导预制件的方法包括向容纳在容器中的烟灰预制件提供第一工艺气体气氛。 将第一气氛保持在容器中，以达到足以至少部分地掺杂或干燥烟灰预型体的第一反应时间。 然后用第二掺杂或干燥气氛至少部分地再填充容器。 将第二掺杂或干燥气氛保持在容器中第二反应时间足以进一步掺杂或干燥烟灰预型体。

公开(公告)号：US20110209460A1

公开(公告)日：2011-09-01

申请号：US12714041

申请日：2010-02-26

申请人： Suhao He ,  Achim Karl-Erich Heibel ,  Pushkar Tandon

发明人： Suhao He ,  Achim Karl-Erich Heibel ,  Pushkar Tandon

IPC分类号： F01N11/00 ,  F01N3/023 ,  B01D46/46

CPC分类号： F01N9/002 ,  F01N3/023 ,  F01N2900/0601 ,  F01N2900/1606 ,  Y02T10/47

摘要： A method for regenerating a particulate filter may comprise calculating a soot layer state correction factor based on a rate of regeneration and a rate of particulate loading in the particulate filter and calculating an estimated soot load in the particulate filter based on a pressure drop of an exhaust gas flowing through the particulate filter and the calculated soot layer state correction factor. The method for regenerating the particulate filter may further comprise causing regeneration of the particulate filter when the estimated soot load is greater than or equal to a threshold value.

摘要翻译： 用于再生颗粒过滤器的方法可以包括基于再生速率和颗粒过滤器中的颗粒负载速率来计算煤烟层状态校正因子，并基于排气压降计算颗粒过滤器中的估计的烟灰负荷 流过微粒过滤器的气体和计算出的煤烟层状态校正因子。 用于再生颗粒过滤器的方法还可以包括当估计的烟炱负荷大于或等于阈值时引起颗粒过滤器的再生。

公开(公告)号：US20110132038A1

公开(公告)日：2011-06-09

申请号：US12958456

申请日：2010-12-02

申请人： Steven Bruce Dawes ,  Andrey V. Filippov ,  Ming-Jun Li ,  Douglas H. Jennings ,  Valery A. Kozlov ,  Pushkar Tandon ,  Ji Wang

发明人： Steven Bruce Dawes ,  Andrey V. Filippov ,  Ming-Jun Li ,  Douglas H. Jennings ,  Valery A. Kozlov ,  Pushkar Tandon ,  Ji Wang

IPC分类号： C03B37/012

CPC分类号： C03B37/01282 ,  C03B2203/04 ,  C03B2203/14 ,  C03B2203/31 ,  C03B2203/34 ,  C03B2203/42 ,  Y02P40/57

摘要： A method and an apparatus for making an optical fiber preform comprising the steps of (i) depositing a plurality of rods are deposited into an inner cavity of an apparatus; (ii) depositing particulate glass material in the inner cavity between the rods and the inner wall; and (iii) applying pressure against the particulate glass material to pressurize the particulate glass material against the plurality of rods.

摘要翻译： 一种用于制造光纤预制棒的方法和装置，其包括以下步骤：（i）沉积多个杆，沉积到装置的内腔中; （ii）将颗粒状玻璃材料沉积在杆和内壁之间的内腔中; 和（iii）对颗粒状玻璃材料施加压力以将颗粒状玻璃材料压靠在多个杆上。

公开(公告)号：US20110064368A1

公开(公告)日：2011-03-17

申请号：US12773358

申请日：2010-05-04

申请人： Dana Craig Bookbinder ,  Ming-Jun Li ,  Pushkar Tandon

发明人： Dana Craig Bookbinder ,  Ming-Jun Li ,  Pushkar Tandon

IPC分类号： G02B6/02

CPC分类号： G02B6/0365 ,  G02B6/03683

摘要： An optical fiber includes a central glass core region comprising maximum refractive index delta percent Δ1, a first inner annular region surrounding said core comprising refractive index delta percent Δ2, a depressed annular region surrounding said inner annular region and comprising Δ3 and a third annular region surrounding the depressed annular region comprising refractive index delta percent Δ4; wherein Δ1MAX>Δ4>Δ2>Δ3. The difference between Δ4 and Δ2 is greater than 0.01 and profile volume, |V3| is at least 60% Δμm2.

摘要翻译： 光纤包括包含最大折射率Δ百分比Dgr的中心玻璃芯区域; 1，围绕所述芯的第一内环形区域，包括折射率Δ百分比Dgr; 2，包围所述内环形区域的凹陷环形区域， 围绕所述凹陷的环形区域的第三环形区域包括折射率Δ百分比Dgr; 4; 其中＆Dgr; 1MAX>＆Dgr; 4>＆Dgr; 2＆Dgr; 3。 ＆Dgr; 4和＆Dgr; 2之间的区别大于0.01和配置文件卷| V3 | 至少60％＆Dgr;μm2。

公开(公告)号：US20090126407A1

公开(公告)日：2009-05-21

申请号：US11985992

申请日：2007-11-19

申请人： Dana Craig Bookbinder ,  Robert Brett Desorcie ,  Pushkar Tandon

发明人： Dana Craig Bookbinder ,  Robert Brett Desorcie ,  Pushkar Tandon

IPC分类号： C03B37/018

CPC分类号： C03B37/0183 ,  C03B37/01861 ,  C03B37/02781 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/14 ,  C03B2203/42 ,  C03B2207/70

摘要： A method of making an optical fiber preform includes depositing silica glass on the inside of a tube substrate via a plasma chemical vapor deposition (PCVD) operation. The parameters of the PCVD operation are controlled such that the silica glass deposited on the interior of the tube substrate contains a non-periodic array of voids in a cladding region of the optical fiber preform. The optical fiber preform may be used to produce an optical fiber having a core and a void containing cladding. The core of the optical fiber has a first index of refraction and the cladding has a second index of refraction less than that of the core.

摘要翻译： 制造光纤预制件的方法包括通过等离子体化学气相沉积（PCVD）操作在管基板的内部沉积二氧化硅玻璃。 控制PCVD操作的参数，使得沉积在管基板内部的石英玻璃在光纤预制件的包层区域中包含非周期性的空隙阵列。 光纤预制件可用于制造具有芯和包含空隙的空隙的光纤。 光纤的核心具有第一折射率，并且包层具有小于芯的折射率的第二折射率。

公开(公告)号：US07450807B2

公开(公告)日：2008-11-11

申请号：US11888958

申请日：2007-08-03

申请人： Scott Robertson Bickham ,  Dana Craig Bookbinder ,  Ming-Jun Li ,  Daniel Aloysius Nolan ,  Pushkar Tandon ,  Snigdharaj Kumar Mishra

发明人： Scott Robertson Bickham ,  Dana Craig Bookbinder ,  Ming-Jun Li ,  Daniel Aloysius Nolan ,  Pushkar Tandon ,  Snigdharaj Kumar Mishra

IPC分类号： G02B6/36 ,  G02B6/02

CPC分类号： G02B6/0365 ,  G02B6/02009 ,  G02B6/02266 ,  G02B6/14

摘要： Optical waveguide fiber that is bend resistant and single moded at 1260 nm and at higher wavelengths. The optical fiber includes a core and cladding, the cladding having an annular inner region, an annular ring region, and an annular outer region. The annular ring region has a low relative refractive index.

摘要翻译： 光纤光纤，具有抗弯曲性，单波长1260 nm，波长较高。 光纤包括芯和包层，包层具有环形内部区域，环形环区域和环形外部区域。 环形区域具有较低的相对折射率。

公开(公告)号：US07450806B2

公开(公告)日：2008-11-11

申请号：US11583098

申请日：2006-10-18

申请人： Dana Craig Bookbinder ,  Richard Michael Fiacco ,  Ming-Jun Li ,  Michael Thomas Murtagh ,  Pushkar Tandon

发明人： Dana Craig Bookbinder ,  Richard Michael Fiacco ,  Ming-Jun Li ,  Michael Thomas Murtagh ,  Pushkar Tandon

IPC分类号： G02B6/02

CPC分类号： C03B37/02781 ,  C03B37/01446 ,  C03B2201/02 ,  C03B2201/31 ,  C03B2203/14 ,  C03B2203/42 ,  C03C13/00 ,  C03C13/04 ,  G02B1/048 ,  G02B6/02333 ,  G02B6/02357

摘要： Microstructured optical fiber and method of making. Glass soot is deposited and then consolidated under conditions which are effective to trap a portion of the consolidation gases in the glass to thereby produce a non-periodic array of voids which may then be used to form a void containing cladding region in an optical fiber. Preferred void producing consolidation gases include nitrogen, argon, CO2, oxygen, chlorine, CF4, CO, SO2 and mixtures thereof.

摘要翻译： 微结构光纤及其制造方法。 玻璃烟灰沉积，然后在有效地捕获玻璃中的一部分固结气体的条件下固化，从而产生非周期性的空隙阵列，然后可以将其用于在光纤中形成含有空隙的包层区域。 优选的产生空隙的固结气体包括氮，氩，CO 2，氧，氯，CF 4，CO，SO 2和它们的混合物。

公开(公告)号：US20080120968A1

公开(公告)日：2008-05-29

申请号：US11605895

申请日：2006-11-29

申请人： Douglas Munroe Beall ,  Achim Karl-Erich Heibel ,  Pushkar Tandon

发明人： Douglas Munroe Beall ,  Achim Karl-Erich Heibel ,  Pushkar Tandon

IPC分类号： F01N3/022 ,  F01N3/023

CPC分类号： F01N3/035 ,  F01N3/021 ,  F01N3/0222 ,  F01N3/0231 ,  F01N3/031 ,  F01N13/009 ,  F01N13/0093 ,  F01N2330/06 ,  F01N2340/04

摘要： A exhaust system and method for venting exhaust from an engine, such as a diesel engine, through an exhaust line coupled to the engine includes a first particulate filter disposed in the exhaust line and “close-coupled” with the engine, and a second particulate filter spaced a distance (d) from the first filter. The first particulate filter is “close-coupled” so that it operates in a passive regeneration mode to a greater extent than the second particulate filter. The first particulate filter may be a partial wall-flow filter including some plugged and some open channels. Some of the plugged channels may be plugged adjacent to an inlet end and others may be plugged adjacent to an outlet end. A partial wall-flow filter is also described having some unplugged flow-through channels and some plugged channels wherein some plugged channels are located adjacent to the inlet end and some are located adjacent to the outlet end.

摘要翻译： 排气系统和方法，用于通过与发动机相连的排气管线从诸如柴油发动机的发动机排放废气，其包括设置在排气管中并与发动机“紧耦合”的第一颗粒过滤器和第二颗粒 过滤器与第一个过滤器间隔一段距离（d）。 第一颗粒过滤器是“紧耦合”的，使得其以比第二微粒过滤器更大的程度在被动再生模式下操作。 第一颗粒过滤器可以是包括一些堵塞和一些开放通道的部分壁流过滤器。 一些堵塞的通道可以在入口端附近堵塞，而其它通道可以在出口端附近堵塞。 还描述了部分壁流式过滤器具有一些未堵塞的流通通道和一些堵塞通道，其中一些堵塞的通道邻近入口端定位，一些堵塞通道邻近出口端定位。

公开(公告)号：US07089766B2

公开(公告)日：2006-08-15

申请号：US11034359

申请日：2005-01-10

申请人： Gerald E. Burke ,  Steven B. Dawes ,  V. Srikant ,  Pushkar Tandon

发明人： Gerald E. Burke ,  Steven B. Dawes ,  V. Srikant ,  Pushkar Tandon

IPC分类号： C03B37/018 ,  C03B37/029

CPC分类号： G03F7/70216 ,  C03B19/1407 ,  C03B19/1415 ,  C03B19/1423 ,  C03B19/1453 ,  C03B37/01202 ,  C03B37/01406 ,  C03B37/01413 ,  C03B37/0142 ,  C03B37/0146 ,  C03B2201/12 ,  C03B2203/22 ,  C03B2207/02 ,  C03B2207/06 ,  C03B2207/08 ,  C03B2207/14 ,  C03B2207/20 ,  C03B2207/30 ,  C03B2207/38 ,  C03B2207/40 ,  C03B2207/42 ,  C03B2207/46 ,  C03B2207/54 ,  C03B2207/70 ,  C03B2207/81 ,  C03C3/06 ,  C03C2201/12 ,  C03C2201/20 ,  C03C2201/23 ,  C03C2201/30 ,  C03C2201/32 ,  F23D14/22 ,  F23D14/32 ,  G03F1/60 ,  G03F7/70958

摘要： Methods, apparatus and precursors for producing substantially water-free silica soot, preforms and glass. The methods and apparatus make substantially water-free fused silica preforms or glass by removing water as a reaction product, removing water from the atmosphere, removing water from the transport process, or combinations thereof. In a first embodiment, substantially water-free soot, preforms or glass are achieved by using a hydrogen-free fuel, such as carbon monoxide, in the deposition process. In another embodiment, a soot producing burner has parameters that enable operation on a substantially hydrogen-free fuel. End burners, which minimize water production, are also described. Such water-free methods are useful in depositing fluorine-doped soot because of the low water present and the efficiency in which fluorine is incorporated. In another embodiment, glassy barrier layer methods and apparatus are described for minimizing dopant migration, especially fluorine. Laser and induction methods and apparatus for forming the barrier layer are depicted. A chlorine, fluorine and silica precursor, such as chlorofluorosilane, may be utilized to form fluorinated soot. Other methods and apparatus are directed to combinations of conventional and substantially water-free processes. One embodiment is directed to combustion enhancing additives for addition to the substantially hydrogen-free fuels. The methods and apparatus in accordance with the invention are particularly useful for producing photomask substrates and optical fiber preforms.

摘要翻译： 用于生产基本上无水的二氧化硅烟灰，预成型件和玻璃的方法，装置和前体。 该方法和装置通过除去水作为反应产物，从大气中除去水分，从运输过程中除去水或其组合，从而使基本上无水的熔融二氧化硅预制件或玻璃。 在第一实施方案中，在沉积工艺中通过使用无氢燃料如一氧化碳来实现基本上无水的烟灰，预型体或玻璃。 在另一个实施方案中，产生烟灰的燃烧器具有能够在基本上无氢燃料上操作的参数。 还描述了最小化水的生产的终端燃烧器。 这种无水方法由于存在低的水和掺入氟的效率而用于沉积氟掺杂烟灰。 在另一个实施例中，描述了用于最小化掺杂剂迁移，特别是氟的玻璃状阻挡层方法和装置。 描述了用于形成阻挡层的激光和感应方法和装置。 可以使用氯，氟和二氧化硅前体，例如氯氟硅烷来形成氟化烟灰。 其它方法和装置涉及常规和基本无水方法的组合。 一个实施方案涉及用于加入基本上无氢燃料的燃烧增强添加剂。 根据本发明的方法和装置特别适用于制造光掩模基片和光纤预制棒。

公开(公告)号：US10185084B2

公开(公告)日：2019-01-22

申请号：US15050589

申请日：2016-02-23

申请人： Douglas Llewellyn Butler ,  Matthew John Dejneka ,  Daniel Warren Hawtof ,  Dale Robert Powers ,  Pushkar Tandon

发明人： Douglas Llewellyn Butler ,  Matthew John Dejneka ,  Daniel Warren Hawtof ,  Dale Robert Powers ,  Pushkar Tandon

IPC分类号： G02B6/02 ,  G02B6/10 ,  H01S3/063 ,  C03B19/14 ,  C03B23/037 ,  C03B23/047 ,  H01S3/17

摘要： Layered glass structures and fabrication methods are described. The methods include depositing soot on a dense glass substrate to form a composite structure and sintering the composite structure to form a layered glass structure. The dense glass substrate may be derived from an optical fiber preform that has been modified to include a planar surface. The composite structure may include one or more soot layers. The layered glass structure may be formed by combining multiple composite structures to form a stack, followed by sintering and fusing the stack. The layered glass structure may further be heated to softening and drawn to control linear dimensions. The layered glass structure or drawn layered glass structure may be configured as a planar waveguide.