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On-line upgrading capacity expansion power adjusting method of wavelength division multiplexing optical transmission system

A transmission system and power adjustment technology, which is applied in the field of online upgrade and expansion power adjustment of wavelength division multiplexing optical transmission systems, can solve problems such as different optical power requirements, and achieve accurate and reliable results

Inactive Publication Date: 2010-08-18
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the defects existing in the prior art, the object of the present invention is to provide a method for adjusting the power of an online upgrade and expansion of a wavelength division multiplexing optical transmission system, which is a relative power reference adjustment method, which is used to adjust the newly added channel during online expansion. Issues requiring different transmit optical power

Method used

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  • On-line upgrading capacity expansion power adjusting method of wavelength division multiplexing optical transmission system
  • On-line upgrading capacity expansion power adjusting method of wavelength division multiplexing optical transmission system
  • On-line upgrading capacity expansion power adjusting method of wavelength division multiplexing optical transmission system

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Embodiment 1

[0049] A WDM system with a low-speed 10Gb / s rate and 0.4nm channel spacing has already opened 16 10Gb / s channels, and needs to upgrade and expand two high-speed 40Gb / s channels.

[0050] The structure of the sending end of the system is as follows image 3 As shown, it includes 16 optical transmission units OTU2S with a rate of 10Gb / s, which are respectively denoted as OTU2S 1 , OTU2S 2 ...OTU2S 16 . Each optical transmission unit emits signal light of a specific wavelength. Each OTU2S is connected with an adjustable optical attenuator VOA, respectively denoted as VOA 1 、VOA 2 ...VOA 16 . The optical attenuator is used to adjust the optical power of the signal light sent by each optical sending unit. The signal light sent by all 16 OTU2S enters the multiplexer OMUX after passing through the corresponding VOA. OMUX multiplexes the signal light from 16 OTU2S into the same optical fiber, and sends it to an adjustable optical attenuator VOA, denoted as VOAa. VOAa is used...

Embodiment 2

[0063] A WDM system with a low-speed 10Gb / s rate and 0.4nm channel spacing has opened 64 10Gb / s channels, and needs to upgrade and expand 12 high-speed 40Gb / s channels.

[0064] The structure of the sending end of the system is as follows Figure 4 As shown, it includes 64 optical transmission units OTU2S with a rate of 10Gb / s, which are respectively denoted as OTU2S 1 , OTU2S 2 ...OTU2S 64 . Each optical transmission unit emits signal light of a specific wavelength. Each OTU2S is connected with an adjustable optical attenuator VOA, respectively denoted as VOA 1 、VOA 2 ...VOA 64 . The optical attenuator is used to adjust the optical power of the signal light sent by each optical sending unit. The signal light sent by all 64 OTU2S enters the multiplexer OMUX after passing through the corresponding VOA. OMUX multiplexes the signal light from 64 OTU2S into the same optical fiber, and sends it to an adjustable optical attenuator VOA, denoted as VOAa. VOAa is used to adju...

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Abstract

The invention relates to an on-line upgrading capacity expansion power adjusting method of a wavelength division multiplexing optical transmission system. The method comprises the steps of: confirming the transmitting power requirement difference between an upgrading capacity expansion wave channel and the original wave channel; taking the original wave channel observed at a circuit monitoring hole as reference; and on the basis, adjusting the power of the upgrading capacity expansion wave channel, observing from the circuit monitoring hole, and leading the difference between the upgrading capacity expansion wave channel and the original wave channel to reach the requirement. At the moment, the transmitting optical power of the capacity expansion wave channel on the circuit reaches the requirement, OSNR reaches the expected target, and the adjustment is completed. An optical spectrum analyzer is needed to be used and is connected at a monitoring hole of an optical amplifier. The on-line upgrading capacity expansion power adjusting method of the wavelength division multiplexing optical transmission system can accurately adjust the transmitting optical power of a newly added high-speed wave channel, is implemented through the monitoring hole of the optical amplifier, and does not interrupt the original wave channel service, thus being simple and practical, solving the key problem of upgrading capacity expansion of a low-speed WDM system, and laying a good foundation for the application of the WDM system in the upgrading capacity expansion.

Description

technical field [0001] The invention relates to optical signal power adjustment in optical fiber lines, in particular to an online upgrade and expansion power adjustment method for a wavelength division multiplexing (WDM) optical transmission system. Background technique [0002] In the current WDM system, a fiber optic line contains multiple channels, and the optical power on the line is the sum of the optical power of each channel. When other conditions remain unchanged, at the output port of the optical amplifier, the optical signal-to-noise ratio (OSNR) increases, the bit error rate decreases, and the performance becomes better; the optical power per channel increases. If it decreases, the OSNR decreases, the bit error rate increases, and the performance deteriorates. However, the higher the transmitted optical power per channel, the better. When the transmitted optical power increases to a certain level, although the OSNR is still improving, the nonlinear effect of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/17H04B10/08H04J14/02H04B10/07H04B10/564
Inventor 徐俊波黄艳琼曹云杨宁陈德华胡国华何建明邓林姚波熊博柴焦徐升
Owner FENGHUO COMM SCI & TECH CO LTD
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