Broadband optical packet generation by multiplexing signals using a bias tee

Abstract

This paper presents a broadband optical packet generation method by multiplexing low- and high-frequency signals using a bias tee. The cut-off frequency of the bias tee, f_c is optimized in terms of the eye-opening ratio for optical packet trains with different guard times and intervals. As a result, the optimal condition is observed to be f_GT < f_c < f₁, and f_c should be closer to f_GT. (where f_GT is the guard frequency and f₁ is the high-pass cut-off frequency of a low-frequency amplifier). We implemented optical packet generation using a bias tee based on the simulation results and confirmed the effectiveness of this method.