A remote pump transmission system

A transmission system and remote pump technology, applied in the field of electrical communication, can solve the problems that the operation is not particularly convenient, the real-time dynamic adjustment cannot be realized, and the application potential of the remote pump amplifier ROPA is weakened, so as to improve the operability and practicability, Improve the overall performance-price ratio and increase the effect of the gain

Inactive Publication Date: 2004-06-02
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In this remote pump system structure, in order to improve the sensitivity of the receiver and compensate the loss introduced by the dispersion compensation module DCM at the receiving end to a certain extent, after the entire link signal transmission fiber, that is, the front end of the receiving end uses a front end Amplifier PA, the preamplifier PA is generally gain-locked, and its gain spectrum and noise figure are basically determined. In this way, when designing the system structure, the only variable is the structure and performance parameters of the remote pump amplifier ROPA. Therefore, When designing the ROPA of the remote pump amplif

Method used

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  • A remote pump transmission system
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Examples

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Example Embodiment

[0016] Example 1:

[0017] This kind of remote pumping transmission system includes the transmitting end of the optical transmission system, the receiving end and the remote pumping amplifier in the transmission link. The remote pumping amplifier has a remote pump source. The transmitting end includes a multiplexer MUX and a dispersion compensation module DCM. It is connected to the power amplifier BA in turn; the front end of the receiving end directly uses a section of erbium-doped fiber EDF2 as the preamplifier, the EDF2 can be erbium-doped fiber with different doping concentrations, and the remote pumping amplifier is the output end of the remote pumping source A tunable optical coupler is connected, and the pump light with a wavelength of 1480nm is directly divided into two paths through the tunable optical coupler. One way is used as the pump light source of the remote pump amplifier, and the wavelength division multiplexer WDM is connected to the remote pump amplifier. The ...

Example Embodiment

[0020] Example 2:

[0021] The difference between this embodiment and the embodiment 1 is as follows: image 3 As shown, the wavelength division multiplexer WDM is connected in front of EDF2, and the pump light source used for the local erbium-doped fiber EDF2 forward pumps the local erbium-doped fiber EDF2, and in embodiment 1, as figure 2 As shown, the pump light source used for the local erbium-doped fiber EDF2 reversely pumps the local erbium-doped fiber EDF2.

[0022] As for its working principle and method, it is the same as that described in Embodiment 1, and will not be repeated here.

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Abstract

A remote pump transmission system relating to electric communication technology, comprising optical transmission system a transmitting end, a receiving end and a remote pump amplifier in the transmission link, characterized by that, the receiving end has an adjustable optical coupler, the pumping light is divided into two branches after passing the adjustable optical coupler directly, one branch is used as the pumping light source as the remote pumping amplifier, the other branch is used as the pumping light source for the local erbium-doped fiber on the receiving end. The invention can exert the remote pump amplifier action to the maximum limit and perform flexible control to the system output spectrum.

Description

technical field [0001] The invention relates to electric communication technology, in particular to a remote pump transmission system. Background technique [0002] The remote pumping optical amplification technology is mainly used in the non-repeater optical transmission system to extend the transmission distance and improve the system power budget, such as figure 1 As shown, adding one or more sections of erbium-doped fiber to the signal transmission link, the pump source with a wavelength of 1480nm can be placed at the system terminal tens of kilometers away from the erbium-doped fiber, that is, the transmitting end or the receiving end, through which the signal The transmission fiber or a special fiber transmits the pump light to the erbium-doped fiber to amplify the signal light. figure 1 Among them, the remote pumping source of the remote pumping amplifier is placed at the receiving end, and the bypass backward pumping method is used, and the bypass forward pumping an...

Claims

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Application Information

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IPC IPC(8): G02B6/26H04B10/291
Inventor 陆洋赵福强李从奇李长春
Owner HUAWEI TECH CO LTD
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