公开(公告)号：EP1129999A2

公开(公告)日：2001-09-05

申请号：EP01301433.7

申请日：2001-02-19

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Dong, Xiaoyuan ,  Hong, Siu-Ping ,  Miller, Thomas John ,  Smith, Don H.

IPC: C03B37/012

CPC classification number: C03B37/0124 ,  C03B37/01211 ,  C03B37/01248 ,  C03B37/02754 ,  C03B2203/23 ,  Y02P40/57

Abstract: Embodiments of the invention include a method for making a multiple overclad optical fiber preform. The method includes positioning a first overclad tube (14) around a preform core rod (12), positioning at least one second overclad tube (56) around the first overclad tube, and collectively heating the preform core and the overclad tubes under pressure to collapse the overclad tubes onto the preform core rod thus producing a multiple overclad optical fiber preform. Heating occurs either in a draw tower furnace, for example, as part of an Overclad During Draw (ODD) process, or, alternatively, by a separate heating source prior to introducing the preform into the draw tower, for example, as in a conventional Rod-In-Tube (RIT) process. The method also includes drawing optical fiber as portions of the preform are being heated in the draw tower furnace or, alternatively, heated by a heating source separate from the draw tower and then moved to the draw tower.

公开(公告)号：EP0887670A3

公开(公告)日：1999-03-10

申请号：EP98304527.9

申请日：1998-06-09

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Chang, Kai Huei ,  Miller, Thomas John ,  Kalish, David ,  Pearsall, Michael L.

IPC: G02B6/16

CPC classification number: C03B37/01211 ,  C03B37/01228 ,  C03B37/01237 ,  C03B37/01248 ,  C03B37/01446 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/24 ,  C03C25/106 ,  C03C25/12 ,  G02B6/02 ,  Y02P40/57

Abstract: A singlemode optical fiber [700] having very low loss at 1385 nm, and a practical method for making same are disclosed. A core rod [20] is fabricated using vapor axial deposition to have a deposited cladding/core ratio ( D / d ) that is less than 7.5. The core rod is dehydrated in a chlorine- or fluorine-containing atmosphere at about 1200°C to reduce the amount of OH present to less than 0.8 parts per billion by weight, and then consolidated in a helium atmosphere at about 1500°C to convert the porous soot body into a glass. The consolidated core rod is elongated using an oxygen-hydrogen torch that creates a layer of OH ions on the surface of the rod that are largely removed by plasma etching. Finally, the core rod is installed in a glass tube [40] having a suitably low OH content. Thereafter, the tube is collapsed onto the rod to create a preform [60]. Conventional methods are employed for drawing an optical fiber from the preform and applying one or more protective coatings [75, 76]. The disclosed method is suitable for commercial production of low-OH fiber. Significantly, the fiber's loss at 1385 nm is reduced to a level that is less than its loss at 1310 nm, thereby rendering the entire wavelength region 1200 - 1600 nm suitable for optical transmission. In particular, wave-division-multiplex systems are now available to transmit optical signals over distances greater than 10 km in the wavelength region between 1360 nm and 1430 nm.

公开(公告)号：EP1129999A3

公开(公告)日：2001-11-21

申请号：EP01301433.7

申请日：2001-02-19

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Dong, Xiaoyuan ,  Hong, Siu-Ping ,  Miller, Thomas John ,  Smith, Don H.

IPC: C03B37/012

CPC classification number: C03B37/0124 ,  C03B37/01211 ,  C03B37/01248 ,  C03B37/02754 ,  C03B2203/23 ,  Y02P40/57

Abstract: Embodiments of the invention include a method for making a multiple overclad optical fiber preform. The method includes positioning a first overclad tube (14) around a preform core rod (12), positioning at least one second overclad tube (56) around the first overclad tube, and collectively heating the preform core and the overclad tubes under pressure to collapse the overclad tubes onto the preform core rod thus producing a multiple overclad optical fiber preform. Heating occurs either in a draw tower furnace, for example, as part of an Overclad During Draw (ODD) process, or, alternatively, by a separate heating source prior to introducing the preform into the draw tower, for example, as in a conventional Rod-In-Tube (RIT) process. The method also includes drawing optical fiber as portions of the preform are being heated in the draw tower furnace or, alternatively, heated by a heating source separate from the draw tower and then moved to the draw tower.

Abstract translation: 本发明的实施例包括用于制造多外包层光纤预制件的方法。 该方法包括：围绕第一外包管周围的预制件的芯棒（12），将至少一个第二外包管（56）定位在第一外包管（14），并共同在压力下加热预成型件的核心和外包覆管塌缩 外包管到预制件的芯棒，从而产生一个多外包层光纤预制件。 预成型件引入所述拉丝塔，对于实施例之前，加热所述发生无论是在拉伸塔炉中，对于实施例中，作为外包层的一部分在DRAW（ODD）过程中，或，可选地，通过单独的加热源，如在常规 棒 - 插入 - 管（RIT）过程。 因此，该方法包括绘图作为在拉制塔炉中被加热预制件的一部分，或者可选地，通过加热源从拉制塔分开加热，然后移动到拉丝塔光纤。

公开(公告)号：EP1104891A1

公开(公告)日：2001-06-06

申请号：EP00127534.6

申请日：1998-06-09

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Chang, Kai Huei ,  Kalish, David ,  Miller, Thomas John ,  Pearsal, Michael L.

IPC: G02B6/22 ,  C03B37/012 ,  C03C25/12 ,  G02B6/16

CPC classification number: C03B37/01211 ,  C03B37/01228 ,  C03B37/01237 ,  C03B37/01248 ,  C03B37/01446 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/24 ,  C03C25/106 ,  C03C25/12 ,  G02B6/02 ,  Y02P40/57

Abstract: A singlemode optical fiber [700] having very low loss at 1385 nm, and a practical method for making same are disclosed. A core rod [20] is fabricated using vapor axial deposition to have a deposited cladding/core ratio (D/d) that is less than 7.5. The core rod is dehydrated in a chlorine- or fluorine-containing atmosphere at about 1200°C to reduce the amount of OH present to less than 0.8 parts per billion by weight, and then consolidated in a helium atmosphere at about 1500°C to convert the porous soot body into a glass. The consolidated core rod is elongated using an oxygen-hydrogen torch that creates a layer of OH ions on the surface of the rod that are largely removed by plasma etching. Finally, the core rod is installed in a glass tube [40] having a suitably low OH content. Thereafter, the tube is collapsed onto the rod to create a preform [60]. Conventional methods are employed for drawing an optical fiber from the preform and applying one or more protective coatings [75, 76]. The disclosed method is suitable for commercial production of low-OH fiber. Significantly, the fiber's loss at 1385 nm is reduced to a level that is less than its loss at 1310 nm, thereby rendering the entire wavelength region 1200 - 1600 nm suitable for optical transmission. In particular, wave-division-multiplex systems are now available to transmit optical signals over distances greater than 10 km in the wavelength region between 1360 nm and 1430 nm.

公开(公告)号：EP0887670A2

公开(公告)日：1998-12-30

申请号：EP98304527.9

申请日：1998-06-09

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Chang, Kai Huei ,  Miller, Thomas John ,  Kalish, David ,  Pearsall, Michael L.

IPC: G02B6/16

CPC classification number: C03B37/01211 ,  C03B37/01228 ,  C03B37/01237 ,  C03B37/01248 ,  C03B37/01446 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/24 ,  C03C25/106 ,  C03C25/12 ,  G02B6/02 ,  Y02P40/57

Abstract: A singlemode optical fiber [700] having very low loss at 1385 nm, and a practical method for making same are disclosed. A core rod [20] is fabricated using vapor axial deposition to have a deposited cladding/core ratio ( D / d ) that is less than 7.5. The core rod is dehydrated in a chlorine- or fluorine-containing atmosphere at about 1200°C to reduce the amount of OH present to less than 0.8 parts per billion by weight, and then consolidated in a helium atmosphere at about 1500°C to convert the porous soot body into a glass. The consolidated core rod is elongated using an oxygen-hydrogen torch that creates a layer of OH ions on the surface of the rod that are largely removed by plasma etching. Finally, the core rod is installed in a glass tube [40] having a suitably low OH content. Thereafter, the tube is collapsed onto the rod to create a preform [60]. Conventional methods are employed for drawing an optical fiber from the preform and applying one or more protective coatings [75, 76]. The disclosed method is suitable for commercial production of low-OH fiber. Significantly, the fiber's loss at 1385 nm is reduced to a level that is less than its loss at 1310 nm, thereby rendering the entire wavelength region 1200 - 1600 nm suitable for optical transmission. In particular, wave-division-multiplex systems are now available to transmit optical signals over distances greater than 10 km in the wavelength region between 1360 nm and 1430 nm.

Abstract translation: 公开了在1385nm具有非常低的损耗的单模光纤Ä700Ü，以及制造其的实用方法。 使用蒸气轴向沉积制造芯棒Ä20Ü以具有小于7.5的沉积包层/芯部比（D / d）。 芯棒在约1200℃的含氯或含氟气氛中脱水，以将OH的量减少到小于0.8重量％，然后在约1500℃的氦气氛中固化，以转化 将多孔烟灰体变成玻璃。 使用氧 - 氢焰炬拉伸固结的芯棒，其在杆的表面上产生通过等离子体蚀刻大量去除的OH离子层。 最后，将芯棒安装在具有适当低的OH含量的玻璃管中。 此后，管子塌陷到杆上以产生预制件Ä60Ü。 采用常规方法从预成型件拉制光纤并施加一个或多个保护涂层Ä75,76Ü。 所公开的方法适用于低OH纤维的商业生产。 值得注意的是，1385nm处的光纤损耗降低到在1310nm处的损耗，从而使整个波长范围为1200〜1600nm适合于光传输。 特别地，波分复用系统现在可用于在1360nm和1430nm之间的波长区域中发射超过10km的距离的光信号。

公开(公告)号：EP0887670B1

公开(公告)日：2001-06-27

申请号：EP98304527.9

申请日：1998-06-09

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Chang, Kai Huei ,  Miller, Thomas John ,  Kalish, David ,  Pearsall, Michael L.

IPC: G02B6/16 ,  C03B37/012 ,  C03B37/014

CPC classification number: C03B37/01211 ,  C03B37/01228 ,  C03B37/01237 ,  C03B37/01248 ,  C03B37/01446 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/24 ,  C03C25/106 ,  C03C25/12 ,  G02B6/02 ,  Y02P40/57