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Super-large-effective-area (sla) optical fiber and communication system incorporating the same

An optical fiber communication system and effective area technology, applied in the direction of cladding optical fiber, transmission system, optical waveguide and light guide, etc., can solve the problems of small possibility, small flexibility of optical fiber path, hindering 1310nm business application, etc., and achieve suppression of nonlinear effects Effect

Active Publication Date: 2006-10-04
FITEL USA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the higher cut-off wavelength of the current SLA fiber will hinder the application of 1310nm services on the same fiber path, making the fiber path less flexible and thus less likely to be configured
Finally, a cutoff wavelength of 1450nm is not preferred for Raman pumping of signals in the S and C bands

Method used

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  • Super-large-effective-area (sla) optical fiber and communication system incorporating the same
  • Super-large-effective-area (sla) optical fiber and communication system incorporating the same
  • Super-large-effective-area (sla) optical fiber and communication system incorporating the same

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Embodiment Construction

[0016] figure 1 is a cross-sectional view of an end face of a super large effective area (SLA) fiber 10 according to one embodiment of the present invention. The SLA fiber 10 comprises a segmented central core region 11, a first annular region 13 surrounding the core region 11, and an outer cladding 14 surrounding the trench region. The core region 11 is divided into sections with different relative refractive indices n 1a and n 1b The first and second partial core region portions 12A and 12B. The first annular region (or groove region) 13 has a nominal refractive index n 2 . The outer cladding 14 has a nominal refractive index n 3 . as below reference Figure 7 As discussed in detail, the SLA fiber according to the present invention may also have other regions, such as another negative relative index region in addition to the trench region 13 .

[0017] It should be noted that figure 1 The fiber 10 shown in is not to scale (the outer diameter of the cladding 14 is pr...

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PUM

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Abstract

A super-large-effective-area (SLA) optical fiber (10) that is suitable for communicating over a wide wavelength range and that, because of its large effective area, suppresses nonlinear effects that typically result from interaction between signal channels. The effective area, Aeff, of the SLA fiber (10) of the present invention preferably is equal to or greater than approximately 80 mu m at a wavelength window around 1310 nm. Thus, the SLA fiber (10) of the present invention has a very large effective area and a very low cutoff wavelength. In accordance with the present invention, a variety of SLA fibers are provided that all have very large effective areas and desirable transmission properties. The large effective areas of the SLA fibers of the present invention enable nonlinear effects to be suppressed, as well as Stimulated Brillouin Scattering in analog transmission. The large effective areas also enable attenuation to be reduced. The result of suppressing nonlinear effects and reducing attenuation enable signals to be transmitted over long distances and over a broad bandwidth.

Description

technical field [0001] The present invention relates to optical fibers. More specifically, the present invention relates to super large effective area (SLA) optical fibers with low loss and with a wide operating wavelength range. Background technique [0002] Optical fibers are thin wires of glass or plastic that can transmit light signals containing relatively large amounts of information over long distances and with relatively low attenuation. In general, optical fibers are made by heating and drawing a portion of an optical preform containing a refractive core region surrounded by a protective cladding of glass or other suitable material. area around. The fiber drawn from the preform is also typically protected by one or more coatings applied to the cladding region. [0003] Advances in transmission technology using optical fibers have enabled optical fibers to have enormous bandwidth capabilities. This bandwidth makes it possible to transmit thousands of telephone co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02H04B10/12G02B6/036
CPCG02B6/03666G02B6/02014G02B6/02019G02B6/02266G02B6/0228G02B6/0281G02B6/03611G02B6/03627G02B6/0365
Inventor 孙懿戴维·W·皮克汉姆吴凤清
Owner FITEL USA CORP