双波长全光自动增益箝制EDFA实验研究

Experimental Studies on dual-wavelength All-optical Gain-clamped Erbium-doped Fiber Amplifier

提出了结构新颖的光纤环镜(FLM)全光自动增益箝制(OAGC)方案,进行了相关实验。通过控制抽运功率,调节腔内损耗和FLM,在环路内实现了波长为1533.20nm和1559.05nm的双波长激光振荡。对工作在透射式和反射式2种状态下的FLM,进行了信号波长为1540nm和1550nm的增益钳制实验。对于1540nm信号,在输入功率小于-14.88dBm的范围内,增益波动ΔG<0.3dB;对于1550nm信号,在输入功率小于-16.51dBm的范围内,增益波动ΔG<0.1dB。实验结果显示,FLM采用透射和反射方式均能达到增益箝制目的,而且得到的信号输出特性几乎一致,表明了这两种方案的等效性。

We have proposed a novel scheme which uses the fiber loop mirror（FLM） in the feedback loop as a filter to realize the dual-clamping EDFA,and carried out the related experiments. A dual-oscillating laser with wavelengths of 1 533.2 nm and 1 559.05 nm is obtained by controlling the pump power and adjusting the cavity losses and the FLM. Gain-damping experiments with signals wavelengths of 12 nm and 13 nm are demonstrated when the FLM works under both reflective and transmissivestates. For the 1 540 nm signal , the gain ripple is no more than 0.3 dB when the input power is less than - 14.88 dBm ; For the 1 550 nm signal , the gain ripple is no more than 0. 1 dB when the input power is less than -16.51dBrm The experimental results have shown that all optical gain-damped mechanism could be realized by using both reflective FLM and transmissive FLM. Moreover,the characteristics of output pulse by these two schemes are almost uniform,which indicate they have equivalent effects on gain clamping.