Novel optical pulse characterization technique using sinusoidal optical phase modulation with a broad usable modulation amplitude range

In this paper we propose a novel non-iterative optical pulse characterization technique using sinusoidal optical phase modulation, which can work with modulation amplitude up to 1.9 radians. The larger usable modulation amplitude would make the proposed method more tolerable to noise present in the recorded pulse spectrum after undergoing phase modulation. The method is then validated experimentally by characterizing a 2-ps pulse train repeating at 10 GHz, generated from a tunable mode locked laser.