Abstract
The aim of this letter is to address the barrier imposed by the exponential-time complexity of current large-signal theory for calculating the chirp-induced distortions in short-range optical transmission systems using directly modulated lasers. This is a critical issue for modern optical orthogonal frequency division multiplexing signals with hundreds of subcarriers, especially for digital signal processing techniques intended to mitigate transmission impairments. A polynomial-time complexity model is proposed and its accuracy can be increased by including higher-order intermodulation products (IMPs). Signal-to-interference ratio differences between our analytical model and simulation results ~ 1 dB are achieved for taking into account IMPs up to fifth order.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
