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Broadband fiber optic tap

A splitter and optical fiber technology, applied in the field of broadband optical fiber splitter, can solve the problems of ejecting optical fiber and reducing the efficiency of tapping

Active Publication Date: 2009-04-22
艾根莱特公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tapping efficiency is reduced when light scatters out of the core but cannot exit the fiber from the splitter, but is instead lost at a point downstream of the splitter
[0010] Unfortunately, according to the '398 Application' teaching, in optical splitters fabricated in conventional communication fibers, the splitting efficiency may vary by as much as 400% within the wavelength band of 1310nm to 1550nm

Method used

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Embodiment Construction

[0031] Referring to the drawings, the optical fiber splitter 100 described in FIG. 1 includes an optical fiber 102 , a first microbend 104 , a second microbend 122 and a reflective surface 106 . Reflective surface 106 and microbends 104, 122 are achieved by using a single CO as described below. 2 Laser radiation forms. Here, a microbend refers to a bent portion of an optical fiber having a radius of curvature similar to the diameter of the optical fiber. In contrast, macrobends refer to bends that have a relatively large radius of curvature compared to the fiber diameter. In the preferred embodiment, microbends 104 and 122 are annealed microbends, meaning that they are formed by locally heating the fiber above the softening temperature. The configuration of microbends 104 and 122 in the fiber is thus permanent and stress-free.

[0032] As described in detail below, microbends 104 and 122 function to scatter optical energy from the core of fiber 102 to the fiber cladding. T...

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Abstract

A broadband optical fiber tap for transferring optical energy out of an optical fiber having an optical fiber with a primary and secondary microbends for the purpose of coupling optical energy into the higher-order modes of the fiber, and a reflecting surface formed in the cladding of the fiber and positioned at an angle so as to reflect, by total internal reflection, higher-order mode energy away from the optical fiber. In the preferred embodiment, the two microbends are spaced apart by a distance approximately equal to one-half of the intermodal beat length for LP01 and LP11 modes of a single-mode fiber.

Description

Technical field [0002] The present invention relates to assemblies for coupling out optical energy from optical fibers, and more particularly to optical fiber splitters for efficiently coupling out optical energy over a relatively broad wavelength range. Background technology [0004] Description of prior art [0005] The increasing complexity of fiber optic networks has created a need for devices that can measure the energy of light flowing through an optical fiber. Such devices are used for network monitoring and control and are in many ways similar to water gauges used to monitor the flow of water through pipes. [0006] In order to measure the flow of light energy in an optical fiber, a small fraction of the light energy must be redirected out of the fiber and into the detector. The detector converts the light energy into an electrical signal that is used to represent the light energy flowing in the fiber. Devices commonly referred to as "optical splitters" perform th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/28G02B6/42G02B6/14
Inventor 克雷格·D·普尔
Owner 艾根莱特公司