针对分布式卫星网络中由于多跳转发导致光信号严重损伤的问题，提出了一种基于级联半导体光放大器(SOA)结合两级偏移滤波结构的波长保持型全光再生方案。该方案利用光脉冲经过不同载流子恢复时间的SOA 时频谱展宽方向不同的特点，通过在两个级联的SOA 之后分别进行红移滤波和蓝移滤波，不仅实现了对光信号的两级再生，而且两次偏移滤波产生的波长偏移相互抵消，使再生前后信号的波长保持不变。研究结果表明：再生方案能够有效地抑制信号幅度噪声和功率起伏，信号Q 因子改善最高可达到8 dB。

Aiming at solving the problem of signal injury caused by multi- retransmission in distributed satellite optical network, a wavelength- shift- free regenerative scheme based on cascading semiconductor optical amplifier (SOA) with two- stage offset filter is presented. Making use of the characteristic of optical pulse after the SOA with different recovery times of carrier can lead to different spectral shifts. The scheme imposes a red- shifted and a blue- shifted filter on signals respectively after two cascading SOAs, which not only gives the two times regeneration for optical pulse, but also compensates the wavelength shift caused by each regeneration. The results show that the amplitude noise and power jitter can be suppressed effectively, and the Q factor of signals can be improved 8 dB at most.