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Nonlinear optical fiber

A nonlinear, optical fiber technology, applied in the field of optical signal processing devices, can solve the problems of low transmission loss, high nonlinear constant, etc., and achieve the effect of low dispersion value

Inactive Publication Date: 2008-05-07
FURUKAWA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such an optical fiber with high nonlinear constant and low transmission loss has not been found so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0224] Table 3 shows the parameter values ​​and characteristic values ​​of the optical fibers shown in Example A1 to Example A10 of the present invention. In addition, MFD in Table 3 refers to the mode field diameter.

[0225] table 3

[0226] Δ1

Δ2

D1 / D2

α

Dispersion

slope

MFD

A eff

lambda C

no 2 / A eff

％

％

ps / nm / km

ps / nm 2 / km

μm

μm 2

nm

/ W

Measurement wavelength

1550nm

1550nm

1550nm

1550nm

1550nm

Example A1

3

-1

0.35

4

-3.96

0.0091

3.273

8.38

1183

69.2×10 -10

Example A2

3

-1

0.55

4

-3.71

-0.001

3.354

8.84

1255

65.5×10 -10

Example A3

5

-1.1

0.5

5

-4.94

0.0057

2.759

6.04

14...

Embodiment C1

[0331] First, a first core member made of silica glass whose relative refractive index difference with respect to pure silica was adjusted to 2.8% by doping germanium was prepared. On the outer periphery of the core piece, silicon tetrachloride (SiCl 4 ) gas is subjected to flame hydrolysis, so that carbon black accumulates to form a porous body, and then 2 Heating it in He to dehydrate it, and then in the SiF containing 4 It was heated in an atmosphere of He to make it a transparent glass, and thus the second core member made of fluorine-doped silica glass was installed.

[0332] Secondly, on the outer periphery of the second core, SiCl 4 The gas is subjected to flame hydrolysis, so that carbon black accumulates to form a porous body, and then in the presence of Cl 2 Heating it in He to dehydrate it, and then heating it in an atmosphere containing He to make it transparent glass and form a cladding made of pure silica.

[0333] In this way, the following optical fiber bas...

Embodiment C2

[0336] An optical fiber having the same structure as in Example 1 was produced in the same manner as in Example C1 except that the outer diameter of the cladding was 80 μm.

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Abstract

The present invention provides an optical fiber excellent in nonlinearity, especially an optical fiber having a low dispersion stable in a wide wavelength region near 1550 nm and a high nonlinearity characteristic are disclosed. An optical signal processing device using this optical fiber, especially an optical wavelength converter and a pulse compressor are disclosed. The optical fiber comprises a core and a clad provided around the core. The optical fiber is characterized in that the dispersion slope at 1550 nm wavelength is in the range from -0.01 to 0.01 ps / nm<2> / km, the absolute value of the dispersion at 1550 nm wavelength is in the range below 10 ps / nm / km, and the nonlinearity coefficient is in the range above 30x10<-10> / W. Further, another mode of an optical fiber having a polarization holding characteristic, a low loss, a high optical signal process efficiency, and a high nonlinearity is disclosed.

Description

[0001] This application is a branch of the application filed on December 25, 2003, with the application number 200380103083.7 (international application number PCT / JP2003 / 016758), and the title of the invention is "Nonlinear Optical Fiber and Optical Signal Processing Device Using the Optical Fiber". case application. technical field [0002] The present invention relates to an optical fiber excellent in nonlinearity and an optical signal processing device using the optical fiber. Background technique [0003] In recent years, high-speed, high-capacity, and long-distance transmission of optical signals are increasingly required. Therefore, it is necessary to find a signal processing technology that realizes high-speed optical signal processing and long-distance transmission. [0004] As an optical signal processing technique, there may be mentioned a method of converting an optical signal into an electrical signal, performing signal processing on the converted electrical sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02G02B6/036G02B6/028G02B6/024G02B6/255G02F1/365
Inventor 广石治郎宫部亮杉崎隆一熊野尚美
Owner FURUKAWA ELECTRIC CO LTD