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Construction method and analysis device of osnr analysis model of roadm network with cascaded wss equipment

A technology for analyzing models and equipment, applied in wavelength division multiplexing systems, electrical components, multiplexing communications, etc., and can solve problems such as inaccurate measurement data

Active Publication Date: 2020-11-13
WUHAN POST & TELECOMM RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: due to factors such as manufacturing tolerances, temperature drift or equipment aging, the shape of the passband optical filter and the shape of the stopband optical filter of each WSS device in the ROADM network will be slightly different, and the measured The problem of inaccurate data,

Method used

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  • Construction method and analysis device of osnr analysis model of roadm network with cascaded wss equipment
  • Construction method and analysis device of osnr analysis model of roadm network with cascaded wss equipment
  • Construction method and analysis device of osnr analysis model of roadm network with cascaded wss equipment

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specific Embodiment 1

[0077] This specific embodiment 1 is a method for constructing an OSNR analysis model of a ROADM network with cascaded WSS devices.

[0078] like figure 1 As shown, the method includes the following steps:

[0079] Step 110, select the WSS equipment identical with ROADM network, obtain the different ports of each WSS equipment under the same channel spacing, the actual shape of the passband optical filter of different channels and the actual shape of the stopband optical filter;

[0080] The above-mentioned measurement adopts the off-line measurement method. Specifically, in this solution, first determine the WSS devices (such as device models and parameters) used in the existing ROADM network, then find the same WSS devices as these WSS devices, and measure the found WSS devices. During the measurement, a wide-spectrum light source can be injected into the WSS device, and the same frequency grid can be used for measurement to obtain the actual shape of the passband optical ...

specific Embodiment 2

[0097] This specific embodiment 2 is based on the above-mentioned specific embodiment 1, and the error function model P (f) used in fitting the shape of the passband optical filter and the shape of the stopband optical filter in steps 120 and 140 has been specifically carried out. limited.

[0098] In step 120, the actual shape P(f) of the passband optical filter is fitted by the following first error function model,

[0099]

[0100] in,

[0101] f=f s -f c -CF1 s , f s is the signal frequency, f c is the channel center frequency, CF1 s is the size of the left and right drift of the center wavelength of the passband optical filter of the WSS device;

[0102] erf() represents the first error function;

[0103] B1 is the aperture bandwidth of the passband optical filter of the WSS device;

[0104] σ denotes the standard deviation of the Gaussian optical transfer function,

[0105]

[0106] BW1 OTF is the optical transfer function bandwidth of the passband optic...

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Abstract

The invention discloses a cascaded WSS ROADM network OSNR analysis model and a construction method and device. The construction method comprises the following steps: acquiring actual shapes of passbands and stop-band optical filters of different ports and channels of each WSS; fitting the actual shape by utilizing an error function model to obtain parameters capable of determining the corresponding WSS, including the aperture bandwidth B, the optical transfer function bandwidth BWOTF of the equipment, drift CFs of the central wavelength and the isolation gamma between ports, and calculating toobtain a corresponding mathematical expected value by combining a probability density function; and fitting to obtain passband and stop-band optical filter fitting shapes of different ports and different channels of each WSS by using the mathematical expectation value through the error function model, thereby constructing an analysis model. The method and the device can effectively solve the problem that the monitoring result is inaccurate after the ROADM network experiences a plurality of WSSs, and the method and the device are simple in scheme, low in cost and easy to implement.

Description

technical field [0001] The present invention relates to the technical field of ROADM network communication, more specifically, relates to a cascaded WSS ROADM network OSNR analysis model and a construction method and device, which are used for monitoring and analyzing the ROADM network OSNR with cascaded WSS equipment. Background technique [0002] The rapid development of various new communication services has put forward a huge demand for the transmission capacity of optical fiber communication systems. Dense Wavelength Division Multiplexing (DWDM for short) technology is widely used in optical fiber for its huge transmission capacity. in the communication network. However, traditional DWDM is still a point-to-point transmission system in essence, and its optical layer networking capability is very limited. The introduction of optical add-drop multiplexers in the DWDM system can realize uplink and downlink of one or more fixed-wavelength signals at network nodes, while si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/079H04J14/02
CPCH04B10/07953H04J14/021
Inventor 李蔚胡春杰余少华
Owner WUHAN POST & TELECOMM RES INST CO LTD
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