EDFAAmplifiers usually have three control modes.
ACC mode: Automatic current control mode, in which the user sets the EDFA pump working current, and the EDFA automatically locks it to achieve constant pump current. When the input optical power fluctuates, the output power will also fluctuate accordingly.
APC mode: Automatic power control mode, in which the user sets the signal light output power of the EDFA. The EDFA automatically controls and adjusts the pump current to stabilize the output signal according to the output power monitored by the PD. In APC mode, the user-adjustable range of the output power is usually 10% to 100% of the maximum output power. The advantage of APC mode is that when the input optical power fluctuates, the EDFA will minimize the fluctuations in output power.
AGC mode: Automatic gain control mode, in which the user sets the gain coefficient of the EDFA. The EDFA will automatically control and adjust the pump current based on the input power and output power detected by the PD to achieve the gain multiple as stable as possible. When the input optical power fluctuates, the output power will also fluctuate accordingly, but the gain coefficient is generally stable.
Three modes of imprisonmentThe parameters of/control are different and the effects are different, as shown in the following table and schematic diagram.
EDFA working mode | user setparameters/Scope | EDFA Monitor and controlparameters | EDFA Controlparameters | achieved purpose and effect |
ACC Mode (Auto Current Control) | pumping current/0~100% | pumping current | pumping current | Pump current is stable |
APC Mode (Auto Power Control) | Output power/10-100% | Output power | pumping current | output power stability |
AGC Mode (Auto Gain Control) | optical power gain/0-25dB | Input and output optical power, calculate optical power gain | pumping current | gain stable |
Anhui Public Network Security Record No. 34019202000815
