Scuola Superiore Sant’Anna, via Moruzzi 1, Pisa 56124, Italy.
Opt Lett. 2013 Jun 1;38(11):1954-6. doi: 10.1364/OL.38.001954.
A compact device with a two-level transfer function (TF) implemented with two semiconductor optical amplifier (SOA)-based stages is proposed and characterized. Each stage exploits nonlinear polarization rotation and self-phase modulation. The obtained improved TF with very flat top and bottom levels makes the scheme suitable for working as a reshaper in all-optical regeneration. The effectiveness of the device is verified in regenerating both nonreturn-to-zero (NRZ) and return-to-zero (RZ) data signals up to 40 Gb/s. Bit error rate measurements demonstrate increased threshold margin and extinction ratio improvement.
提出并表征了一种采用两级基于半导体光放大器（SOA）的级联结构实现的具有两级传递函数（TF）的紧凑器件。每个级联结构利用非线性偏振旋转和自相位调制。所得到的具有非常平坦顶底电平的改进 TF 使得该方案适合作为全光再生中的整形器。该器件在再生非归零（NRZ）和归零（RZ）数据信号方面的有效性高达 40 Gb/s 得到了验证。误码率测量表明，该器件具有更高的阈值裕度和消光比改善。
