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Wavelength dispersion compensator and optical transmission device

A technology of wavelength dispersion and compensator, applied in the field of optical communication

Inactive Publication Date: 2006-05-24
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, this compensator faces the same problem as above

Method used

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  • Wavelength dispersion compensator and optical transmission device
  • Wavelength dispersion compensator and optical transmission device
  • Wavelength dispersion compensator and optical transmission device

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Experimental program
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Embodiment Construction

[0032] Hereinafter, preferred embodiments according to the present invention will be described with reference to the accompanying drawings.

[0033] 2A and 2B show the configuration of a wavelength dispersion compensator implementing the present invention, and are a variable type of wavelength dispersion compensator that compensates for wavelength dispersion by using a VIPA element. For example, the wavelength dispersion compensator is used in an optical transmission device that transmits an optical signal through an optical transmission line such as an optical fiber in an optical transmission network.

[0034] 2A is a perspective view showing the configuration of the wavelength dispersion compensator, and Figure 2B It is a plan view showing the structure shown in FIG. 2A when viewed from above.

[0035] As verified by comparison with Figs. 1A and 1B, for the wavelength dispersion compensator shown in Figs. 2A and 2B and implementing the present invention, a big difference lies in...

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Abstract

The light output from the single-mode fiber is output as parallel light from the dual-core collimator, and input to the deflection prism. The parallel light output from the deflecting prism is vertically input to the approximately half area of ​​the plane side of the line focusing lens, passes through the approximately half area of ​​the line focusing lens, the VIPA element, and the condenser lens, and is irradiated on the free type surface reflector , so that its wavelength dispersion is compensated. Then, the light passes through the condenser lens, the VIPA element, the line focusing lens, and the remaining area of ​​the deflection prism, and is input to the dual-core collimator as parallel light, wherein the light from the single-mode fiber does not pass through through the remaining area. The parallel light input to the dual-core collimator is converged by a collimating lens, and input to another single-mode optical fiber.

Description

Technical field [0001] The present invention relates to an optical communication technology, and more specifically, to a wavelength dispersion compensation technology, which is used to correct the wavelength dispersion that occurs when an optical signal is transmitted through an optical fiber, and is used to restore the signal to an original optical signal. Background technique [0002] For the above-mentioned technologies, for example, there are VIPA (Virtually ImagedPhased Array) elements and wavelength dispersion compensators. Among them, the VIPA element is disclosed in the specification of US Patent No. 6028706, and is adopted in the light transmittance The two sides of the parallel plate are coated with reflective films. The wavelength dispersion compensator is disclosed in Japanese Patent Publication No. 2001-305338, and uses a light dispersion compensation element formed by combining multiple layers with different refractive indexes. [0003] Here, the configuration of a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/28G02B27/00G02B6/32G02B6/34G02B26/00H04B10/2507H04B10/2513
CPCG02B6/29358G02B6/29394G02B6/29395H04B10/25133
Inventor 川幡雄一
Owner FUJITSU LTD