High speed tunable filter for wavelength-division multiplexing communication systems

In this paper, a high-speed tunable filter using optical polarization control module is proposed and experimentally demonstrated. The output spectrum of the filter and is obtained and high-speed tuning performance is demonstrated. The proposed filter is cost effective and simple; consisting of polarization controller (PC), polarizer(P) and polarization maintaining fiber (PMF). To testify the high speed tuning effect, the eye diagram and ON/OFF switching performance are measured. Experimental results revealed that the proposed filter is a good candidate to be applied in wavelength-division multiplexing (WDM) communication systems.