公开(公告)号：WO0196920A3

公开(公告)日：2002-05-30

申请号：PCT/US0118828

申请日：2001-06-12

Applicant: SCIENTIFIC ATLANTA

Inventor： ANTHON DOUGLAS W ,  FISHER JAMES H

IPC: G02B6/26 ,  G02B6/32 ,  G02B6/34 ,  G02F1/09 ,  G02F1/095 ,  H01S3/094

CPC classification number: G02B6/2937 ,  G02B6/2746 ,  G02B6/32 ,  G02B6/327 ,  G02F1/093 ,  G02F1/0955 ,  H01S3/094003

Abstract: Systems and methods are described for the construction of micro-optical couplers incorporating optical tapers to reshape multimode optical inputs. Incorporating tapers allows the spatial properties of the multimode inputs to be adjusted to match to the spatial properties of the output fiber, even in systems that are limited to unity-magnification imaging optics. In an exemplary embodiment, a larger-core multimode fiber (110) and a smaller-core double-clad fiber (109) are glued into a glass capillary (101), with the multimode fiber tapering to a smaller diameter inside the capillary. Polishing the capillary to expose the taper gives a multimode core that is smaller than the double-clad core. Imaging with unity magnification through a GRIN lenses (104, 107) and a dichroic reflector (106) transfers the multimode input efficiently to the double-clad fiber with greater efficiency than would have been possible with the same optics and an untapered fiber. The dichroic reflector is transparent to a second singlemode signal input (100), which is collimated by a second GRIN lens (104) and coupled to through the reflector (106) to the core of the double-clad fiber (109). An isolator (105) may be included in the signal beam path, and the double-clad fiber may be replaced by a double-clad gain fiber.

Abstract translation: 描述了用于构建包含光锥的微光耦合器来重构多模光输入的系统和方法。 结合锥度允许调整多模输入的空间属性以匹配输出光纤的空间属性，即使在限于单位放大成像光学系统的系统中也是如此。 在一个示例性实施例中，大芯多纤维（110）和较小芯双包层光纤（109）被胶合到玻璃毛细管（101）中，多模光纤在毛细管内逐渐变细。 抛光毛细管以暴露锥度给出了比双包层核心小的多模芯。 通过GRIN透镜（104,107）和二向色反射器（106）以单位放大率成像，以比相同光学元件和无光纤维可能的效率更高的效率将多模输入有效地传送到双包层光纤。 二向色反射器对于由第二GRIN透镜（104）准直并通过反射器（106）耦合到双包层光纤（109）的芯的第二单模信号输入（100）是透明的。 隔离器（105）可以包括在信号光束路径中，并且双包层光纤可以由双包层增益光纤代替。

公开(公告)号：WO0138244A8

公开(公告)日：2001-06-28

申请号：PCT/US0031902

申请日：2000-11-20

Applicant: SCIENTIFIC ATLANTA

Inventor： ANTHON DOUGLAS W ,  EMSLIE CHRIS ,  MATON PETER ,  SPEED ASHLEY

IPC: C03B37/012 ,  C03B37/018 ,  C03B37/027 ,  G02B6/036 ,  G02B6/10 ,  H01S3/067 ,  G02B6/22

CPC classification number: G02B6/03694 ,  C03B37/01211 ,  C03B37/01838 ,  C03B37/027 ,  C03B2201/02 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2201/40 ,  C03B2203/12 ,  C03B2203/22 ,  G02B6/03622 ,  G02B6/03638 ,  G02B6/105 ,  H01S3/06708 ,  H01S3/06729

Abstract: An optical fiber (10) made with a central core (12), a first cladding layer (16), and a second cladding layer (18) having a series of perturbations or irregularities formed into the otherwise generally circular outer boundary of the first cladding layer (16). The irregularities in the first cladding layer (16) interrupt the propagation of skew rays and encourage coupling into the core (12). An intermediate cladding (14) may be provided between core and first cladding layer (16). A method of fabricatiNG the optical fiber is also disclosed, comprising, drilling a plurality of holes within the first cladding forming material and at the boundary thereof with the material forming the second cladding layer, drilling a central hole and inserting a preform core rod into said central hole. Drawing integrates the rod and drilled rod and the plurality of holes are collaped, so forming an irregular, quasi-circular boundary between first and second cladding forming layers in the drawn fiber.

Abstract translation: 由中心纤芯（12），第一包层（16）和第二包层（18）制成的光纤（10）具有一系列扰动或不规则性，这些扰动或不规则性形成于第一包层的另外一般为圆形的外边界 层（16）。 第一包层（16）中的不规则性中断了倾斜射线的传播并且促使耦合到芯（12）中。 中间包层（14）可以设置在芯与第一包层（16）之间。 还公开了一种制造光纤的方法，该方法包括：在第一包层形成材料内和其边界处用形成第二包层的材料钻出多个孔，钻中心孔并将预制棒芯棒插入所述 中心孔。 拉伸将杆和钻杆集成在一起，并且多个孔成形，从而在拉制纤维中的第一和第二包层形成层之间形成不规则的准圆形边界。