公开(公告)号：WO2007122630A2

公开(公告)日：2007-11-01

申请号：PCT/IN2007/000153

申请日：2007-04-20

Applicant: STERLITE OPTICAL TECHNOLOGIES LTD. ,  KHAN, Amjad ,  SHAH, Sanket ,  MIRAS, Jegan

Inventor： KHAN, Amjad ,  SHAH, Sanket ,  MIRAS, Jegan

IPC: C03B37/014

CPC classification number: C03B37/01446 ,  C03B2201/31 ,  C03B2203/24

Abstract: A method for manufacturing an optical fiber having uniform refractive index profile, and substantially reduced macrobending loss and attenuation loss is provided comprising controlling one or more of parameters including concentration of dopant in outer region and inner region of the core region with respect to middle region of the core region of the optical fiber preform, duration of dehydration process step, concentration of chlorine gas to control refractive index of outer region and inner region of the core region for achieving a fiber having substantially uniform refractive index profile, and substantially reduced macrobending loss and attenuation loss.

Abstract translation: 提供了一种用于制造具有均匀折射率分布的光纤的方法，并且实质上减少了宏弯损耗和衰减损失，包括控制一个或多个参数，包括掺杂剂在外部区域和内部区域中的浓度 芯区域相对于光纤预制棒的芯区域的中间区域，脱水工艺步骤的持续时间，氯气的浓度以控制芯区域的外区域和内区域的折射率，以实现具有基本均匀的折射率的光纤 简介，并大幅降低宏观损失和衰减损失。

公开(公告)号：WO2008038298A2

公开(公告)日：2008-04-03

申请号：PCT/IN2007/000306

申请日：2007-07-24

Applicant: STERLITE OPTICAL TECHNOLOGIES LTD. ,  SHAH, Sanket ,  MIRAS, Jegan ,  KULKARNI, Parag

Inventor： SHAH, Sanket ,  MIRAS, Jegan ,  KULKARNI, Parag

IPC: C03B37/018

CPC classification number: C03B37/01493 ,  C03B19/1492 ,  C03B37/01466 ,  Y02P40/57

Abstract: A process for preparing the mandrel suitable for producing flawless optical fiber preform, wherein the mandrel can be easily removed from the soot porous body without causing any defects, such as voids, bubbles, impurities, uncollapsed portion in the centerline region of the preform thus produced, wherein said process is characterized by heating the mandrel before the start of soot deposition to form a soot porous body having core and clad.

Abstract translation: 制备适于制造无瑕疵光纤预制棒的心轴的方法，其中心轴可容易地从烟porous多孔体移除而不会引起任何缺陷，例如空隙，气泡，杂质，未塌陷部分 如此制造的预成型件的中心线区域，其中所述方法的特征在于在开始烟灰沉积之前加热心轴以形成具有芯和包层的烟porous多孔体。

公开(公告)号：WO2008062465A2

公开(公告)日：2008-05-29

申请号：PCT/IN2007/000481

申请日：2007-10-15

Applicant: STERLITE OPTICAL TECHNOLOGIES LTD. ,  SAHU, Hrudayan, Ranjan ,  KUMAR, Rakesh ,  BIRADAR, Balaji ,  THAKUR, Deepak

Inventor： SAHU, Hrudayan, Ranjan ,  KUMAR, Rakesh ,  BIRADAR, Balaji ,  THAKUR, Deepak

IPC: C03B37/012

CPC classification number: C03B37/029 ,  C03B2205/62 ,  C03B2205/72

Abstract: An apparatus and method for drawing a fiber having desired waveguide parameters, particularly cut-off wavelength is provided. The apparatus is characterized by a temperature measurement means (113) provided near surface (A) of the preform (105), being capable of directly measuring surface temperature of that part of the preform (105) which is outside the furnace; and a programmable logic controller [PLC] (114) connectable to said temperature measurement means (113), and being capable of controlling and maintaining temperature of that part of the preform (105) which is inside the furnace (101) by continuously controlling and maintaining the power supply to heating (elements 104) of the furnace, wherein the PLC (114) is capable of controlling and maintaining power supply to the heating elements (104) by employing equation (1) till the preform completely just enters the furnace Power supply = (start power) x C + (surface temperature of preform which is outside furnace) x (slope term)...... Eqn. (1) and by employing equation (2) after the preform has completely entered in the furnace Power supply = slope x (( π (d/2) 2 xL r )/ 1000) + C1......Eqn. (2) .

Abstract translation: 提供了一种用于绘制具有所需波导参数，特别是截止波长的光纤的装置和方法。 该装置的特征在于，在预成型件（105）的表面（A）附近设置的温度测量装置（113）能够直接测量炉外的预成型件（105）的该部分的表面温度; 以及可连接到所述温度测量装置（113）的可编程逻辑控制器（PLC）（114），并且能够通过连续控制和控制炉子（101）内的预成型件（105）的该部分的温度来控制和维持 保持电源供应到炉的加热（元件104），其中PLC（114）能够通过使用等式（1）来控制和维持对加热元件（104）的供电，直到预成型件完全刚刚进入炉子 供给=（起动功率）×C +（炉外的预制件的表面温度）×（斜率项）......等式 （1）a

公开(公告)号：WO2008062448A2

公开(公告)日：2008-05-29

申请号：PCT/IN2007/000422

申请日：2007-09-14

Applicant: STERLITE OPTICAL TECHNOLOGIES LTD. ,  GUPTA, Ajay ,  KULKARNI, Parag

Inventor： GUPTA, Ajay ,  KULKARNI, Parag

IPC: B65D81/20 ,  B65D85/20 ,  H04B10/00

CPC classification number: C03B37/01202

Abstract: A storage and transportation device for storage and transportation of a material is provided, wherein the device comprises front surface (201) and rear surface (202) capable of being connected with each other through left surface (203) and right surface (204) suitable to form a vertical structure which in-turn is capable of being closed by bottom surface (205) at its bottom end and by top surface (206) at its top end to form a box type structure (200) provided with an inlet (207) towards its top end for supply of a gas to achieve desired environment inside the box structure (200) and an outlet (208) for the release of gas to achieve continuous flow of the gas thereby capable of removing all dust particles/foreign particles and environmental gases from the box structure (200) before storing any material therein, and a filteration means (209) for providing clean air before entry into box structure (200), and a holding - cum - hanging means (210) to hold and hang the material being stored and transported.

Abstract translation: 提供了用于储存和运输材料的储存和运输设备，其中该设备包括能够通过左表面（203）相互连接的前表面（201）和后表面（202） ）和右表面（204）适于形成垂直结构，所述垂直结构又能够由其底端处的底表面（205）和其顶端处的顶表面（206）封闭以形成盒式结构（ 200），其设置有朝向其顶端的入口（207），用于供应气体以实现箱结构（200）内的期望环境和用于释放气体以实现气体的连续流动的出口（208），从而能够 在将任何材料存储在其中之前从箱结构（200）中除去所有灰尘颗粒/外来颗粒和环境气体，以及在进入箱体结构（200）之前提供清洁空气的过滤装置（209），以及保持和悬挂 用于固定和悬挂材料的装置（210） 我被储存和运输。

公开(公告)号：WO2007102168A1

公开(公告)日：2007-09-13

申请号：PCT/IN2007/000025

申请日：2007-01-23

Applicant: STERLITE OPTICAL TECHNOLOGIES LTD. ,  SHAH, Sanket ,  SINGH, Chandraveer ,  SHINDE, Nitin

Inventor： SHAH, Sanket ,  SINGH, Chandraveer ,  SHINDE, Nitin

IPC: C03B37/014

CPC classification number: C03B37/01486 ,  C03B37/01884 ,  Y10T279/12

Abstract: A rotary seal (20) capable of joining a stationary member (21) with a rotating member (22) is provided, wherein the rotary seal comprises a body (23) having a central hole (24) therethrough, wherein said central hole (24) has stepwise reducing diameter so as to form two part (25 and 26) central hole (24), wherein front part (25) of said central hole (24) has higher inner diameter and rear part (26) of said central hole (24) has lower inner diameter, wherein said front part (25) forms a seat (27) with said rear part (26) of said central hole (24), wherein said front part (25) of said central hole (24) is capable of accommodating at least one sealing member (28), and said sealing member (28) is made to sit onto said seat (27) by a screwing member (31), which when fixed onto body (23) fits into front part (25) of said central hole (24), and said rear part (26) of said central hole (24) is capable of accommodating connecting member (32) of said stationary member (21). An apparatus comprising the rotary seal (20) is also provided.

Abstract translation: 提供一种能够将静止部件（21）与旋转部件（22）接合的旋转密封件（20），其中旋转密封件包括具有穿过其的中心孔（24）的主体（23），其中所述中心孔 ）具有逐步减小直径以便形成两个部分（25和26）中心孔（24），其中所述中心孔（24）的前部（25）具有较高的内径和所述中心孔的后部（26） 24）具有较小的内径，其中所述前部（25）与所述中心孔（24）的所述后部（26）形成座（27），其中所述中心孔（24）的所述前部（25） 能够容纳至少一个密封构件（28），并且所述密封构件（28）通过螺纹构件（31）而被安置在所述座椅（27）上，当所述密封构件（31）固定到主体（23）上时， 所述中心孔（24）的所述后部（26）和所述中心孔（24）的所述后部（26）能够容纳所述固定构件（21）的连接构件（32）。 还提供了包括旋转密封件（20）的设备。

公开(公告)号：WO2007069278A3

公开(公告)日：2007-06-21

申请号：PCT/IN2006/000477

申请日：2006-11-28

Applicant: STERLITE OPTICAL TECHNOLOGIES LTD. ,  DAYANANDAN, Sreena ,  SHAH, Sanket ,  ACHARYA, Ravikiran ,  MIRAS, Jegan

Inventor： DAYANANDAN, Sreena ,  SHAH, Sanket ,  ACHARYA, Ravikiran ,  MIRAS, Jegan

IPC: C03B37/018 ,  G02B6/10

Abstract: A method for producing optical fiber preform capable of producing optical fiber having low and uniform optical attenuation loss along its entire length including the top end portion is provided. The method comprises carrying out simultaneously sintering and collapsing steps by inserting the dehydrated hollow soot porous body with predetermined speed in hot zone of the furnace till its top end reaches the hot zone and is left for a predetermined duration thereafter the preform is uplifted for a predetermined length at a predetermined speed to avoid heat loss in the optical preform and re-inserted in the hot zone of sintering furnace at a predetermined speed and left for predetermined duration to result in formation of the preform having collapsed capillary including at its top end.

公开(公告)号：WO2007043060A1

公开(公告)日：2007-04-19

申请号：PCT/IN2005/000354

申请日：2005-10-28

Applicant: STERLITE OPTICAL TECHNOLOGIES LTD. ,  BANGALORE KRISHNASWAMY, Pannaga ,  DUTTA, Saurav ,  PANNEERSELVAM, Sathis, Ram ,  NAGESWARAN, Senthil, Kumar

Inventor： BANGALORE KRISHNASWAMY, Pannaga ,  DUTTA, Saurav ,  PANNEERSELVAM, Sathis, Ram ,  NAGESWARAN, Senthil, Kumar

IPC: C03B37/025 ,  C03B37/07

CPC classification number: C03B37/0253 ,  G02B6/0288 ,  G02B6/03611 ,  G02B6/03622 ,  Y02P40/57

Abstract: A method for manufacturing a multimode optical fiber having higher bandwidth comprising applying correction factor to obtain desired layerwise alpha refractive index profile thereby resulting in formation of the preform to form an optical fiber having higher bandwidth. The correction factor is determined from difference between ideal layerwise mode delay and actual layerwise mode delay. The process also comprises determining the correction factor from difference between ideal layerwise alpha and actual layerwise alpha.

Abstract translation: 一种用于制造具有较高带宽的多模光纤的方法，包括应用校正因子以获得所需的分层α折射率分布，从而形成预成型件以形成具有较高带宽的光纤。 校正因子由理想分层模式延迟与实际分层模式延迟之间的差异决定。 该过程还包括从理想分层α和实际分层α之间的差异确定校正因子。

公开(公告)号：WO2007125540A1

公开(公告)日：2007-11-08

申请号：PCT/IN2007/000027

申请日：2007-01-23

Applicant: STERLITE OPTICAL TECHNOLOGIES LTD. ,  SHASHIKANT, Prasad ,  NAIR, Manoj

Inventor： SHASHIKANT, Prasad ,  NAIR, Manoj

IPC: G02B6/02 ,  G02B6/036

CPC classification number: G02B6/03688 ,  G02B6/02014 ,  G02B6/02242 ,  G02B6/02271 ,  G02B6/03644 ,  G02B6/03666

Abstract: A dispersion optimized optical fiber for wideband optical transmission is disclosed. The fiber comprises centre core (1), inner cladding (2), ring core (3), outer cladding (4) and outer glass region (5), characterized by inner cladding 2 provided onto outer periphery of the centre core (1), ring core (3) provided onto outer periphery of inner cladding (2), outer cladding (4) provided onto outer periphery of ring core (3), and outer glass region (5) surrounding outer cladding (4), wherein refractive indices of various regions of the fiber are related in a manner that centre core 1 has higher refractive index than that of ring core (3), ring core (3) has higher refractive index than that of outer glas's region (5), outer cladding (4) has equal to or lower refractive index than that of outer glass region (5), and inner cladding (2) has lower refractive index than that of outer cladding region (4), that is the refractive index of various regions of the fiber is related by relationship n 1 > n 3 > n 5 ≥ n4 > n 2 or the relationship Del 1 > DeI 3 > DeI 5 ≥ DeI 4 > DeI 2 .

Abstract translation: 公开了一种用于宽带光传输的色散优化光纤。 纤维包括中心芯（1），内包层（2），环芯（3），外包层（4）和外玻璃区域（5），其特征在于设置在中心芯（1）的外周上的内包层2， ，设置在内包层（2）的外周上的环形芯（3），设置在环形芯（3）的外周上的外包层（4）和围绕外包层（4）的外玻璃区域（5），折射率 纤维的各个区域以中心纤芯1的折射率高于环芯（3）的折射率的方式相关联，环芯（3）的折射率比外部玻璃的区域（5），外部包层 4）具有等于或低于外玻璃区域（5）的折射率或更低的折射率，并且内包层（2）的折射率比外包层区域（4）的折射率低，即，纤维的各个区域的折射率 与关系n相关联n N 3> n 2>或者关系De 1

公开(公告)号：WO2007054961A2

公开(公告)日：2007-05-18

申请号：PCT/IN2006/000334

申请日：2006-08-31

Applicant: STERLITE OPTICAL TECHNOLOGIES LTD. ,  SHAH, Sanket ,  SHAH, Jinesh ,  TRIPATHY, Santiswarup

Inventor： SHAH, Sanket ,  SHAH, Jinesh ,  TRIPATHY, Santiswarup

IPC: C03B37/018 ,  G02B6/10

CPC classification number: C03B37/0148 ,  Y02P40/57

Abstract: A method for producing an optical fiber preform having a large size soot porous body is provided wherein opposite ends of the rod are heated by heating means to achieve a predetermined temperature which is increased in a controlled manner in a stepwise mode or a gradual mode or a non-linear mode by varying flow rate and/or ratio of oxyhydrogen gases to heating means to achieve a particular temperature and soot porous body of desired diameter. In one embodiment, the predetermined temperature is increased to achieve a particular temperature and an intermediate diameter of soot porous body, wherein the particular temperature is optionally maintained till a soot porous body of a desired diameter is produced which is subjected to sintering process to produce the optical fiber preform having a large size soot porous body.

Abstract translation: 提供一种具有大尺寸烟灰多孔体的光纤预制件的制造方法，其中杆的相对端通过加热装置加热，以实现以受控方式以逐步模式或逐渐模式或逐渐模式增加的预定温度 通过改变氢气与加热装置的流速和/或比例来实现所需直径的特定温度和烟炱多孔体的非线性模式。 在一个实施方案中，增加预定温度以达到烟炱多孔体的特定温度和中间直径，其中特定温度可选地保持，直到产生所需直径的烟炱多孔体，其经历烧结过程以产生 具有大尺寸烟灰多孔体的光纤预制棒。

公开(公告)号：WO2008035363A2

公开(公告)日：2008-03-27

申请号：PCT/IN2007/000247

申请日：2007-06-20

Applicant: STERLITE OPTICAL TECHNOLOGIES LTD. ,  JIJO, Paul ,  SARAVANAN, Guru

Inventor： JIJO, Paul ,  SARAVANAN, Guru

IPC: C03B37/018

CPC classification number: C03B37/01486

Abstract: An improved suspension-cum-holding device for an optical fiber (preform 21) comprising a cylindrical body (22) consisting of a closed top end (23) and open bottom end (24) is disclosed, wherein the closed top end (23) is provided with a securing means (25) capable of securing the suspension-cum-holding device (21) in the furnace, the cylindrical body (22) being provided with an opening (26) towards the closed top end (23), characterized in that the opening (26) extends rearward to form a cylindrical hollow body (27) which is provided with two openings (28 and 29) in its lower surface, wherein the openings (28 and 29) extend downwards respectively to form cylindrical bodies (28a and 29a), wherein the cylindrical body (28a) and cylindrical body (29a) join and merge with each other at a point (30) forming a body (31), wherein the cylindrical body (27) is provided with a ball support means (32) at the interface of cylindrical body (27) and cylindrical body (29a) which is capable of supporting the handle ball (11B) provided on the preform handle (11) of the optical fiber preform (12).

Abstract translation: 公开了一种用于光纤（预制件21）的改进的悬挂和夹持装置，包括由封闭的顶端（23）和开口底端（24）组成的圆柱体（22），其中封闭的顶端（23） 设置有能够将悬挂暨保持装置（21）固定在炉中的固定装置（25），该圆柱形主体（22）设置有朝向封闭的顶端（23）的开口（26），其特征在于 因为开口（26）向后延伸以形成在其下表面中设置有两个开口（28和29）的圆柱形中空体（27），其中开口（28和29）分别向下延伸以形成圆柱体（ 28a和29a），其中圆柱体（28a）和圆柱体（29a）在形成主体（31）的点（30）处彼此接合并合并，其中圆柱体（27）设置有球支撑 在圆柱体（27）的界面处的装置（32）和能够支撑的圆筒体（29a） 将设置在光纤预制件（12）的预成型手柄（11）上的把手球（11B）放置。