Category Archives: XPolM

Grand Unified Theory

Bridging the worlds of OFDM (on which I spent the last year) and XPolM (on which I spent the three years before that), I thought it might be interesting to see what an OFDM channel does to an XPolM probe. This is an extension of all the stuff that was written in this post, in […]

XPolM Covariance Visualized

In this post we’ll take a closer look at the mysterious covariance function which can describe the accumulation of inter-channel fiber nonlinearities quite well. We’ll also illustrate how the dispersion map of a fiber link influences fiber nonlinearity impact via this function. Covariance Recap The particular inter-channel nonlinearity that we will talk about is cross-polarization […]

catching up on XPolM

Well, it’s been a few months since the OFC this year, but I had so many ideas on OFDM that I wanted to get online that I kinda completely missed the new papers on cross-polarization modulation that came out this year. A very interesting read (I wasn’t at OFC myself) was Nonlinear Polarization Effects and […]

Cross-Channel Fiber Nonlinearities

In a recent discussion with Curtis Menyuk, Alexei Pilipetskii, and Chongjin Xie I was made aware of a slightly inexact statement in the JLT published last year in which I was a co-author. It concerned the separation of XPM and XPolM in the nonlinear phase evolution equation. Since we were writing about XPolM at the […]