What type of Raman amplifier used at receive end?
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Dear friend! When the transmission distance is large and the EDFA amplifier board (such as the OBU1/OAU1) cannot meet the OA requirements, or a lower noise figure is required, a Raman amplifier is required. The Raman at the transmit end of the signal is called the forward Raman, and the Raman at the receive end is called the backward Raman. A backward Raman amplifier board (RAU1/RAU2/SRAU/SRAPXF/CRPC01) is used at the receiving end of signals. The direction of the pump light on the backward Raman amplifier board is opposite to that of the signal light. Take the signal flow of RAU1 as an example.
The pump source of the RAU1 board sends the pump light to the WDM side through the LINE optical interface. On the line, the signals that are amplified through the distributed amplification are input through the LINE interface. The splitter then splits them into two, among which the service optical signals are output through the SYS interface. A few supervisory signals are output to the multi-channel spectrum analyzer unit or test instrument through the MONS interface for online optical performance monitoring. The board sends the service signal to the EDFA module through the IN optical port. The EDFA optical module amplifies the optical power of the signal and locks the gain of the signal. Then the signal is sent to the DCM through the TDC interface for dispersion compensation and returns to the EDFA optical module through the RDC interface. At last, the amplified multiplexed signal is output through the OUT interface. Thanks! |
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Dear friend! When the transmission distance is large and the EDFA amplifier board (such as the OBU1/OAU1) cannot meet the OA requirements, or a lower noise figure is required, a Raman amplifier is required. The Raman at the transmit end of the signal is called the forward Raman, and the Raman at the receive end is called the backward Raman. A backward Raman amplifier board (RAU1/RAU2/SRAU/SRAPXF/CRPC01) is used at the receiving end of signals. The direction of the pump light on the backward Raman amplifier board is opposite to that of the signal light. Take the signal flow of RAU1 as an example.
The pump source of the RAU1 board sends the pump light to the WDM side through the LINE optical interface. On the line, the signals that are amplified through the distributed amplification are input through the LINE interface. The splitter then splits them into two, among which the service optical signals are output through the SYS interface. A few supervisory signals are output to the multi-channel spectrum analyzer unit or test instrument through the MONS interface for online optical performance monitoring. The board sends the service signal to the EDFA module through the IN optical port. The EDFA optical module amplifies the optical power of the signal and locks the gain of the signal. Then the signal is sent to the DCM through the TDC interface for dispersion compensation and returns to the EDFA optical module through the RDC interface. At last, the amplified multiplexed signal is output through the OUT interface. Thanks! |
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