公开(公告)号：US5961682A

公开(公告)日：1999-10-05

申请号：US745653

申请日：1996-11-12

Applicant: Yong-woo Lee ,  Alexey Nikolaevich Guryanov ,  Vladimir Fedororich Khopin ,  Dmitry D. Gusovsky

Inventor： Yong-woo Lee ,  Alexey Nikolaevich Guryanov ,  Vladimir Fedororich Khopin ,  Dmitry D. Gusovsky

IPC: G02B6/00 ,  C03B37/018 ,  C03B37/027

CPC classification number: C03B37/01807 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2207/81 ,  C03B2207/90

Abstract: A method of fabricating an optical fiber doped with a rare earth component using a volatile complex, which flattens the light frequency response under a stimulated emission of radiation principle using a modified chemical vapor deposition method. Silicon tetrachloride (SiCl.sub.4) and oxygen are injected into a quartz reaction tube under a heating process, so that a cladding layer is repeatedly deposited. Then, a volatile organic metal chelate, silicon tetrachloride and oxygen are injected into the quartz reaction tube, and then heated and water-cooled to form a porous layer. At the same time, a rare earth element is deposited on the porous layer, to thereby form a core layer. Thereafter, via a high heating process, a preform is completed. Then, an optical fiber is obtained from the preform via a drawing-out process. Here, hydroxide ions (OH.sup.-) which occur as the organic ligand is volatilized and cause an optical loss of the optical fiber is removed as the porous layer is formed by the water-cooling, and an added rare earth content is easily controlled, so that the rare earth with high concentration is evenly distributed. Also, since the core laver adopts SiO.sub.2 and Al.sub.2 O.sub.3 as a host material instead of GeO.sub.2, the difference in a refractive index between the cladding and core layers becomes greater then 0.025, to thereby provide the optical fiber with excellent optical characteristics.

Abstract translation: 使用挥发性络合物制造掺杂有稀土元素的光纤的方法，其使用改进的化学气相沉积法在辐射原理的受激发射下使光频率响应平坦化。 在加热过程中将四氯化硅（SiCl 4）和氧气注入石英反应管中，从而重复沉积包覆层。 然后，将挥发性有机金属螯合物，四氯化硅和氧气注入石英反应管中，然后加热并水冷以形成多孔层。 同时，在多孔层上沉积稀土元素，从而形成芯层。 此后，通过高加热工艺，完成预制件。 然后，通过拉出工艺从预制棒获得光纤。 这里，作为有机配位体发生的氢氧根离子（OH-）挥发而引起光纤的光学损失，由于通过水冷而形成多孔层，所以容易控制添加的稀土含量 高浓度稀土均匀分布。 此外，由于核心紫菜采用SiO 2和Al 2 O 3作为主体材料代替GeO 2，所以包层和芯层之间的折射率差异大于0.025，从而为光纤提供优异的光学特性。