双波长全光自动增益箝制掺铒光纤放大器的实验研究

提出了结构简单的光纤布喇格光栅（FBG）双波长全光自动增益箝制方案，并进行了相关实验.结果表明，在三种不同的箝制波长组合1535.64nm+1562.68nm、1530.48nm+1562.68nm、1530.48 nm+1551.36 nm条件下，1540 nm信号的输出增益大小和输入信号功率动态范围几乎一致.对应此三种箝制波长组合，环路内的损耗分别为：14.7 dB、15 dB、15 dB.由此证明，在相同泵浦条件和环路损耗条件下，此三种不同箝制波长组合具有近似相同的箝制效果.而1551.36 nm+1562.68 nm箝制波长组合得到的结果相差甚远.此结果说明，在设计双波长全光自动增益箝制掺铒光纤放大器（OAGC-EDFA）时，为了取得足够大的信号增益，两箝制波长的波长间隔应尽量较大.

Experimental Studies on the Dual-wavelength Optical Auto Gain Clamping EDFA

A simple scheme using fiber Bragg gratings to realize dual-wavelength optical auto gain clamping erbium-doped fiber amplifier is proposed and demonstrated. It shows that in three kinds of different clamping wavelength combinations. 1535.64 nm and 1562.68 nm, 1530.48 nm and 1562.68 nm, 1530.48 nm and 1551.36 nm, the outputs gain and dynamic state scopes of 1540 nm signal are almost the same. For above three clamping wavelength combinations, loop loss is 14.7 dB, 15 dB and 15 dB, respectively. For the same pump conditions and loop loss, these three kinds of clamping wavelength combinations lead to almost the same results, which is proved by experimental results. However, the result is very different from above under the condition of 1551.36 nm and 1562.68 nm clamping wavelength combinations. It is revealed that when designing a dual-wavelength optical auto gain clamping EDFA, to get high gain, the separation of two clamping wavelengths should be as big as possible.