Control device and control method for realizing rapid convergence of Er-doped fiber amplifier
An erbium-doped fiber and control device technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of complex implementation of AGC mode, and achieve the effects of high-precision convergence control, high accuracy, and simple algorithm structure
Active Publication Date: 2012-06-27
GUANGXUN SCI & TECH WUHAN
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The first two are relatively easy to implement, while the implementation of the AGC mode is more complicated
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[0035] The control device and control method for realizing fast convergence of the erbium-doped fiber amplifier of the present invention will be described in detail below in conjunction with the accompanying drawings of the embodiments.
[0036]In PID control, if there is only P, then a static difference will be introduced, that is, there is a fixed difference between the adjustment amount and the target value. In feedback control, we can obtain the difference between the target value and the actual value, but how to calculate the output through this difference is the key. When the size of P cannot be accurately obtained, I can be added to adjust it to realize a mode of self-adaptation, and D is added to speed up the adjustment process.
[0037] If you adjust the P value while calculating the error, so as to realize simple and fast convergence control, you can get rid of the PID algorithm mode. This calculation method can be simply described as adjusting the K factor of the f...
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The invention discloses a control device and a control method for realizing rapid convergence of an Er-doped fiber amplifier. The device comprises an input photoelectric detection diode, an input optical detection transconductance circuit and an input optical analog-to-digital converter which are connected in sequence, and an output photoelectric detection diode, an output optical detection transconductance circuit and an output optical analog-to-digital converter which are connected in sequence; the outputs of the input optical analog-to-digital converter and the output optical analog-to-digital converter are both connected with a calculation unit; the output of the calculation unit enters to Er-doped fiber through an analog-to-digital converter and a pump laser. The method comprises thefollowing steps: the input light intensity Pin and the output light intensity Pout respectively generate two paths of light generated current according to set proportion; the two paths of light generated current are respectively converted into voltage signals; the voltage signals respectively generate an input light intensity value and an output light intensity value which are respectively input to the calculation unit for calculating PUMP output result which is transmitted to the digital-to-analog converter so as to drive the pump laser to generate pump light to enter Er-doped fiber, thus realizing light amplification of the Er-doped fiber under a locking gain mode.
Description
technical field [0001] The invention relates to an erbium-doped fiber amplifier. In particular, it relates to a method for quickly realizing the locking of the target gain when the input light intensity changes or the set gain changes when the erbium-doped fiber amplifier is in the automatic gain locking control mode, thereby effectively ensuring the stability and reliability of the entire optical communication system A control device and a control method for realizing rapid convergence of an erbium-doped fiber amplifier. Background technique [0002] EDFA (Erbium-doped Fiber Amplifier) is one of the key devices in optical communication network, which amplifies the signal transmitted in the optical fiber, thus effectively improving the transmission distance of optical signal. With the continuous improvement of the capacity of the optical network, the network structure is further complicated, and new requirements are put forward for the EDFA control method. The traditiona...
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IPC IPC(8): G02F1/39H04B10/17
Inventor 何俊李春雨印新达龙浩江毅
Owner GUANGXUN SCI & TECH WUHAN