公开(公告)号：EP1456695A4

公开(公告)日：2006-07-19

申请号：EP02787033

申请日：2002-12-11

申请人： CORNING INC

发明人： ALLAN DOUGLAS C ,  BROWN JOHN T ,  CHACON LISA C ,  ELLISON ADAM J G ,  FAJARDO JAMES C ,  GRAY STUART ,  HOUSE KEITH L ,  KOCH KARL W III ,  POWERS DALE R ,  WEST JAMES A

IPC分类号： G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03C13/04 ,  G02B6/02 ,  G02B6/036 ,  G02F1/35 ,  G02B1/00

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.

公开(公告)号：EP1332116A4

公开(公告)日：2005-04-13

申请号：EP01968806

申请日：2001-09-12

申请人： CORNING INC

发明人： BROWN JOHN T ,  DOBBINS MICHAEL S ,  HECKLE CHRISTINE E ,  MCLAY ROBERT E ,  MISRA MAHENDRA K ,  POWERS DALE R ,  WASILEWSKI MICHAEL H

IPC分类号： C03B8/04 ,  C03B19/14 ,  C03B20/00

CPC分类号： C03B19/1423 ,  C03B19/1415 ,  C03B2201/03 ,  C03B2201/07 ,  C03B2201/21 ,  C03B2201/23 ,  C03B2207/06 ,  C03B2207/12 ,  C03B2207/20 ,  C03B2207/22 ,  C03B2207/32 ,  C03B2207/36

摘要： A method for preparing high-purity, bulk fused silica includes supplying silane gas (11), a gaseous fuel (8), and oxygen gas (10B) to a combustion burner (14). A fuel and oxygen mixture (13) is produces when fuel (8) and oxygen gas (10A) in a premixing chamber (12). Nitrogen gas (17A) may also be supplied to the burner (14) which is located in the crown (16) of a furnace (15). Silica particles are formed by passing the silane gas into a flame formed by the combustion reaction of the gaseous fuel with the oxygen gas while maintaining the ratio of the flow rate of the gaseous fuel to the flow rate of the silane gas no less than twelve and the ratio of the flow rate of the gaseous fuel to the flow rate of the oxygen gas no less than three. Silane flow rates are controlled with a mass flow controller (51) and the flow of other gasses is monitored with flow meters (49). The silica particles formed are immediately deposited onto a hot bait (18) inside a containment vessel (21) to form a boule (19).