The Performance Study Of Two Kinds Of Optical Duobinary Codes Optical Fiber Transmission

Introduced the principles of Optical Duobinary Return to Zero DRZ and Modified Duobinary Return to Zero MDRZ code pattern generated, produces these signals by optical communication simulation software, a 40Gb/s single-channel optical fiber transmission system is designed to simulate these code patterns, to study and compare with their nonlinear tolerance and transmission distance, study result shows that the MD-RZ in the capability of nonlinear torlance is better than DRZ in the condition of higher input fiber optical power.