双抽运光纤光参变放大的全光多波长变换与码型转换

利用强度调制的数据信号光作为一路抽运光,与另一路直流或者正弦强度调制抽运光组合可以在双抽运光纤光参变放大过程中实现全光多波长变换或者在全光多波长变换的同时实现码型转换.理论上,从信号增益的角度分析了波长转换与码型转换的原理.实验上演示了2.5Gb/s的非归零(NRZ)码信号的全光多波长转换与到归零(RZ)码信号的转换.多波长转换实验表明:双抽运条件下的光参变过程可以实现多波长转换并得到正、反码的输出,还同时对信号有一定的再生作用.码型转换后信号的占空比为30%,消光比也得到提高.

All Optical Multi-Wavelength Conversion and Data Format Conversion Based on Dual-Pumped Fiber Optical Parametric Amplifier

By the combination of data intensity modulated pump and continuous wave pump or sinusoidal intensity modulated pump, all optical multi-wavelength conversion and multi-wavelength conversion with data format conversion are presented by using a dual-pumped fiber optical parametric amplifier (FOPA). The operation principle is analyzed with respect to the gain. Experimentally, the multi-wavelength conversion and multi-wavelength conversion with data format conversion between non-return-to-zero (NRZ) and return-to-zero (RZ) are demonstrated under the bit rate of 2.5Gb/s. The experimental results indicate that the dual-pumped fiber optical parametric amplifier is able to implement multi-wavelength conversion to achieve normal and invert pattern with some degree of regeneration. The data format conversion gives the signal with duty ratio of 30% and improved extinction ratio.