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研究了OOK-DPSK、33%RZ-DPSK和CSRZ-DPSK在光纤布拉格光栅(FBG)对称补偿、后补偿和预补偿等色散补偿系统中的传输性能。结果表明非线性效应较低时33%RZ-DPSK在三种FBG色散补偿系统中皆具有最佳传输特性,且在不同色散补偿系统中三种码型各自存在一个“拐点”距离值,当传输距离小于该“拐点”值时,FBG色散对称补偿系统的传输性能最佳,当传输距离大于该“拐点”值时,则FBG色散后补偿系统的传输性能最优。而当非线性效应影响较大时,CSRZ-DPSK具有最好的传输特性。
The transmission performance of OOK-DPSK, 33% RZ-DPSK and CSRZ-DPSK in dispersion compensation systems such as FBG symmetric compensation, post-compensation and pre-compensation are studied. The results show that 33% RZ-DPSK has the best transmission characteristics in all three kinds of FBG dispersion compensation systems with low nonlinearity, and there is an “inflection point” distance value for each of the three types of dispersion in different dispersion compensation systems. When the transmission distance is less than the “inflection point ” value, the transmission performance of the FBG chromatic dispersion symmetric compensation system is the best. When the transmission distance is greater than the “inflection point ” value, the transmission performance of the FBG chromatic dispersion compensation system is optimal. CSRZ-DPSK has the best transmission characteristics when the nonlinear effect is more influential.