光传输链路高速自动增益控制研究

Research on High-speed Auto-gain Control System for Optical Fiber Transmission Chain

摘要:

分析了光纤传输链路信号波动来源,得出引起信号波动的两种关键因素,针对该两种因素设计了一套高速自动增益控制系统(AGC)以及一套针对该系统的计算机软件效标方案,在光纤链路中通过引入该系统,使得光纤传输链路输出射频功率波动由以前的11 dB降低为0.5 dB以内。

Abstract:

By analyzing the source of signal fluctuation in optical fiber transmission chain,two key elements that will cause the fluctuation of the signal were obtained.A set of high-speed automatic gain control system(AGC system) and a scheme of calibration and a PC software based on this scheme for the AGC system were designed.By introducing the calibrated AGC system into the optical fiber chain,the flatness of the signal level has been greatly improved form about 11 dB to 0.5 dB.