Broadband-adjustable dispersion compensation method and dispersion compensation device
A dispersion compensation, broadband technology, applied in the direction of eliminating distortion/dispersion, optical fiber transmission, electrical components, etc., can solve the problems of difficult to achieve high-precision compensation, complex management, time-consuming, etc., to achieve convenient management, high compensation accuracy, and simple use. Effect
Active Publication Date: 2015-04-08
青岛自贸激光科技有限公司
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Problems solved by technology
This compensation method requires a large number of modules in inventory, the management is more complicated and time-consuming, and it is difficult to achieve high-precision compensation
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[0049] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0050] Such as figure 1 shown in the figure for the range in D 0 ~D 0 +ΔD(ΔD=ΔD 1 +...ΔD k ) within the distribution of dispersion in a certain band. Divide the dispersion in this range into two parts for compensation, first use the dispersion provided by the fixed-value dispersion compensation unit 1 to adjust the main dispersion value D 0 Make compensation. The optional dispersion compensation unit 2 includes N modules with a small amount of dispersion compensation. The size of N is determined by the dispersion compensation accuracy. If the dispersion compensation accuracy is required to be -d1~d2 (d1, d2 are both greater than zero, d=d1+d2) , then N=ΔD / d (N is greater than the result of rounding). The disp...
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The invention relates to a broadband-adjustable dispersion compensation device, comprising a fixed value dispersion compensation unit, an adjustable control unit, a selectable dispersion compensation unit and an output control unit which are connected in sequence, wherein the fixed value dispersion compensation unit is used for coarsely compensating optical signals; the adjustable control unit is used for selecting a proper module from the selectable dispersion compensation unit to realize high-accuracy dispersion compensation; the selectable dispersion compensation unit is used for providing modules capable of realizing high-accuracy dispersion compensation; and the output control unit outputs compensated optical signals. The invention also relates to a broadband-adjustable dispersion compensation method. The invention has the advantages of realizing adjustable dispersion compensation and obtaining higher compensation accuracy. Problems caused by optical fiber process errors and the slope index errors of a dispersion compensation module (DCM) are solved; elements for realizing a dispersion compensation function are not limited; and the device is simple to use and convenient to manage, thereby obviously improving the dispersion management efficiency.
Description
technical field [0001] The invention relates to the technical field of optical dispersion compensation, in particular to a broadband adjustable dispersion compensation method and a dispersion compensation device. Background technique [0002] With the development of society, the demand for information transmission has increased rapidly and the demand for communication bandwidth has expanded rapidly. Large-capacity and high-speed DWDM has become the trend of system development. When the single-channel rate of the optical fiber communication system is upgraded to 40Gbit / s and above, the dispersion (CD) has become the main factor seriously affecting the system performance. Dispersion compensation results are not only affected by environmental changes, but also closely related to optical fiber process errors and test instrument errors. Due to the constraints of various factors such as dispersion slope and wavelength correlation, the dispersion slope index of the existing fixed-...
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IPC IPC(8): H04B10/2525H04B10/2513
Inventor 曹祥东王艳梅
Owner 青岛自贸激光科技有限公司