Finally, the importance of the AGC in WDM system is discussed.Due to its relatively low cost and high long term reliability, electrical AGC EDFA is popular in practical systems.

• 讨论了自动增益控制在WDM系统中的重要性,而电路自动增益控制由于性能稳定、性能良好,所以在实际运用中倍受青睐。