Electronic Dispersion Pre-Compensation in PM-QPSK Systems over Mixed-Fiber Links

TL;DR

This paper investigates the use of electronic dispersion pre-compensation in PM-QPSK optical systems over mixed-fiber links, highlighting potential non-linearity reduction benefits and the challenges posed by increased PAPR.

Contribution

It demonstrates the potential of dispersion pre-compensation to reduce non-linearities in mixed-fiber PM-QPSK systems and discusses the transmitter challenges due to higher PAPR.

Findings

Dispersion pre-compensation can significantly reduce non-linear effects.

Pre-compensation increases PAPR, requiring more robust transmitter design.

Potential trade-offs between non-linearity reduction and transmitter complexity.

Abstract

Dispersion pre-compensation is shown to potentially lead to a substantial non-linearity reduction in PM-QPSK links that use a mixture of high and low dispersion fibers. However, the much larger PAPR of the pre-compensated signal poses challenging requirements on the transmitter.