With the updating of wdm system and development of optical transition network , gain - clamped erbium - doped fiber amplifier ( gc - edfa ) fixes the problem of gain fluctuation and vibrating when input power and upload channel numbers are changing 隨著wdm系統(tǒng)的升級及光傳送網(wǎng)絡的發(fā)展,增益控制摻鉺光纖放大器( gc - edfa )在輸入功率和通道數(shù)目變化時維持放大器增益穩(wěn)定方面,發(fā)揮著日益重要的作用。