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Optical amplifier and its method

An optical amplifier and optical amplification technology, applied in the field of WDM system, can solve the problem that it is difficult to reduce the number of optical components

Inactive Publication Date: 2003-07-16
ERICSSON-LG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the C-band and L-band optical signal amplifiers respectively include optical elements for providing pump optical signals, it is difficult to reduce the number of optical elements in existing WDM systems

Method used

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  • Optical amplifier and its method
  • Optical amplifier and its method
  • Optical amplifier and its method

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Embodiment Construction

[0034] Detailed Description of Preferred Embodiments

[0035] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. image 3 Shown is a block diagram of an optical amplifier structure according to a preferred embodiment of the present invention. like image 3As shown, the optical amplifier of the present invention includes: a first C-band EDFA 100, which amplifies the C-band input optical signal in order to reduce the noise figure (NF); a gain flattening filter 200, which is used to flatten the first C-band EDFA The gain of the amplified input optical signal in 100, and output the optical signal part 220 filtered out by the gain flattening filter 200 as the result of gain flattening; the second C-band EDFA 300, which is used to amplify by the gain flattening filter The optical signal 210 of gain flattening of device 200, and therefore adjusts the magnitude of gain; The first coupler 400, it preferably util...

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Abstract

In an optical amplifier and a method thereof, and in particular to a wavelength division multiplexing system using a C-band optical signal and a L-band optical signal, by using a portion of a C-band optical signal filtered out during gain flattening as a pump optical signal for amplification of an L-band optical signal, optical components required by prior systems for providing a pump optical signal to an L-band optical signal amplifier are not required. Accordingly, the present invention reduces the number of required optical components. In addition, by using the portion of the C-band optical signal filtered out during gain flattening, energy usage efficiency is improved.

Description

technical field [0001] The present invention relates to a WDM (Wavelength Division Multiplexing) system, in particular to an optical amplifier and its method. Background technique [0002] Because the demand for bandwidth has increased enormously, it is nearly impossible to meet future bandwidth demands with existing Internet or Asynchronous Transfer Mode (ATM) technologies. Therefore, new technologies capable of providing wider bandwidths are required. Optical communication technology has emerged as a technology capable of meeting these bandwidth demands. [0003] A wavelength division multiplexing (WDM) method utilizes light beams of different wavelengths to simultaneously transmit multiple channels for optical communication. [0004] A wavelength division multiplexing (WDM) optical communication network includes a transmitter for converting data into an optical signal and transmitting it; an optical transmission channel for transmitting the optical signal to a receiving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/02H01S3/067H01S3/10H01S3/16
CPCH01S3/06766H01S2301/02H01S3/06758H01S3/1608H01S2301/04H01S3/10023H01S3/0677H04B10/00H04B10/291
Inventor 李文燮
Owner ERICSSON-LG